Entries by Hannah Wangui

-What two groups of green algae that are most related to land plants? -What are five traits that separate land plants from green algae? -What are five traits that separate land plants from green algae?

August 19, 2019 in /by

-What two groups of green algae that are most related to land plants?-What are five traits that separate land plants from green algae?   Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

 

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1.1.Suppose that to become activated, an inactive protein in a cell must be phosphorylated. Explain how a chemical signal from outside the cell can trigger this internal change? 2.Describe each of the following receptors and choose which of the following receptors that could be trigger as well as the pathway to activation of the protein and explain your reasoning.. Explain how a chemical signal from outside the cell can trigger this internal change? 2.Describe each of the following receptors and choose which of the following receptors that could be trigger as well as the pathway to activation of the protein and explain your reasoning.

August 19, 2019 in /by

1.Suppose that to become activated, an inactive protein in a cell must be phosphorylated. Explain how a chemical signal from outside the cell can trigger this internal change? 2.Describe each of the following receptors and choose which of the following receptors that could be trigger as well as the pathway to activation of the protein […]

 

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13.13.Use the following information to answer the questions below: Research published in the journal Cough in 2012 examined the records of 241 children who visited a pediatrician with a severe cough. They found that coughing stopped in 47% of the 101 children who were treated with the non-opiate cough suppressant levodropropizine compared with 28% of the 60 children treated with cough suppressants containing opiates and 20% of the 80 children who were not prescribed anything for their coughs. The difference in cough relief was found to be statistically significant. However, in reviewing the study a critic pointed out that pediatricians are known to be hesitant to prescribe opiate based cough suppressants in very young children except in very specific medical circumstances. This study was: a. an observational study without any control group(s). b.an experiment with control group(s). c. an experiment without any control group(s). d.an observational study with control group(s). If the sample size in this study involved only 80 children instead of 241, but the percentage of children who’s cough stopped was the same in all groups, then a.the p-value would be smaller and results would definitely still be statistically significant. b. the p-value would be bigger and the results may or may not still be significant. c.the p-value would be smaller and the results may or may not still be significant. d.the p-value would be bigger and the results would definitely still be significant. In this situation: a. the treatment was the explanatory variable and whether the child stopped coughing is the response variable. b. the treatment was the response variable and whether the child stopped coughing is the explanatory variable c. the medical circumstances affecting what is prescribed was the response variable and whether the child stopped coughing was the explanatory variable. d.the medical circumstances affecting what is prescribed was the response variable and the treatment was the explanatory variable. The standard error for the proportion of children taking levodropropizine who’s cough stopped is about: a.0.00025 b.0.47 c.0.05 d.0.18 14.Use the following information to answer the questions below: Recently, the National Center for Education Statistics reported a study of a random sample of 1990 public school teachers whose first year teaching was in 2007-2008. The study found that 5 years later (in 2013) 17% of the teachers had left the profession. However, amongst the 1580 teachers who were assigned a mentor in their first year of teaching 14% had left the profession compared with 29% of the 410 teachers who did not have a mentor in their first year. The standard error for the proportion of mentored teachers who left the profession before 2013 is: a.14% (which equals .14 in decimal form) b.5.6% (which equals .056 in decimal form) c.2.5% (which equals .025 in decimal form) d. 0.9% (which equals .009 in decimal form) The standard error for the proportion of un-mentored teachers who left the profession before 2013 is: a. smaller than the previous answer b.the same as the previous answer c. larger than the previous answer If the standard error of the difference between the proportions is 2.5% (0.025), what would be the 95% confidence interval for the difference between the proportions of mentored and un-mentored teachers who left the profession before 2013: a.15% ± 1.3% b.15% ± 2.5% c.15% ± 8.3% d.15% ± 5.0% If the 95% confidence interval for the difference between the proportions of mentored and un-mentored teachers who left the profession before 2013 is (9%, 21%), what can be concluded? a.The difference between the mentored and un-mentored teachers is significant. b.The difference between the mentored and un-mentored teachers is not significant. c.The difference between the mentored and un-mentored teachers shows that mentoring programs cause teachers to stay involved in teaching longer. 15.Use the following information to answer the questions below: A paint manufacturer fills cans of paint using a machine that has been calibrated to fill the cans to contain an average of 1 gallon (128 ounces) each. To test whether their machine has come out of calibration and will tend to overfill the cans, the manufacturer takes a random sample of 100 cans and finds that they average 128.2 ounces with an standard deviation of 4 ounces. Is this strong evidence that the can-filling machine is set too high? We wish to carry out the appropriate hypothesis test. In this situation the null hypothesis is that: a. the long run average is greater than 128.2. b. the long run average equals 128.2. c. the long run average is greater than 128. d. the long run average equals 128. The p-value for the significance test is: a.16% b.2% c.31% d.68% Suppose the p-value for the test is 0.21. We can then conclude a. that the null hypothesis is a reasonable explanation of the data. b.that the null hypothesis is a poor explanation of the data. c. that the null hypothesis is true. d.that the alternative hypotheses is true. In this situation, the alternative hypothesis is a. one-tailed b. two-tailed c.more than two-tailed They found that coughing stopped in 47% of the 101 children who were treated with the non-opiate cough suppressant levodropropizine compared with 28% of the 60 children treated with cough suppressants containing opiates and 20% of the 80 children who were not prescribed anything for their coughs. The difference in cough relief was found to be statistically significant. However, in reviewing the study a critic pointed out that pediatricians are known to be hesitant to prescribe opiate based cough suppressants in very young children except in very specific medical circumstances. This study was: a. an observational study without any control group(s). b.an experiment with control group(s). c. an experiment without any control group(s). d.an observational study with control group(s). If the sample size in this study involved only 80 children instead of 241, but the percentage of children who’s cough stopped was the same in all groups, then a.the p-value would be smaller and results would definitely still be statistically significant. b. the p-value would be bigger and the results may or may not still be significant. c.the p-value would be smaller and the results may or may not still be significant. d.the p-value would be bigger and the results would definitely still be significant. In this situation: a. the treatment was the explanatory variable and whether the child stopped coughing is the response variable. b. the treatment was the response variable and whether the child stopped coughing is the explanatory variable c. the medical circumstances affecting what is prescribed was the response variable and whether the child stopped coughing was the explanatory variable. d.the medical circumstances affecting what is prescribed was the response variable and the treatment was the explanatory variable. The standard error for the proportion of children taking levodropropizine who’s cough stopped is about: a.0.00025 b.0.47 c.0.05 d.0.18 14.Use the following information to answer the questions below: Recently, the National Center for Education Statistics reported a study of a random sample of 1990 public school teachers whose first year teaching was in 2007-2008. The study found that 5 years later (in 2013) 17% of the teachers had left the profession. However, amongst the 1580 teachers who were assigned a mentor in their first year of teaching 14% had left the profession compared with 29% of the 410 teachers who did not have a mentor in their first year. The standard error for the proportion of mentored teachers who left the profession before 2013 is: a.14% (which equals .14 in decimal form) b.5.6% (which equals .056 in decimal form) c.2.5% (which equals .025 in decimal form) d. 0.9% (which equals .009 in decimal form) The standard error for the proportion of un-mentored teachers who left the profession before 2013 is: a. smaller than the previous answer b.the same as the previous answer c. larger than the previous answer If the standard error of the difference between the proportions is 2.5% (0.025), what would be the 95% confidence interval for the difference between the proportions of mentored and un-mentored teachers who left the profession before 2013: a.15% ± 1.3% b.15% ± 2.5% c.15% ± 8.3% d.15% ± 5.0% If the 95% confidence interval for the difference between the proportions of mentored and un-mentored teachers who left the profession before 2013 is (9%, 21%), what can be concluded? a.The difference between the mentored and un-mentored teachers is significant. b.The difference between the mentored and un-mentored teachers is not significant. c.The difference between the mentored and un-mentored teachers shows that mentoring programs cause teachers to stay involved in teaching longer. 15.Use the following information to answer the questions below: A paint manufacturer fills cans of paint using a machine that has been calibrated to fill the cans to contain an average of 1 gallon (128 ounces) each. To test whether their machine has come out of calibration and will tend to overfill the cans, the manufacturer takes a random sample of 100 cans and finds that they average 128.2 ounces with an standard deviation of 4 ounces. Is this strong evidence that the can-filling machine is set too high? We wish to carry out the appropriate hypothesis test. In this situation the null hypothesis is that: a. the long run average is greater than 128.2. b. the long run average equals 128.2. c. the long run average is greater than 128. d. the long run average equals 128. The p-value for the significance test is: a.16% b.2% c.31% d.68% Suppose the p-value for the test is 0.21. We can then conclude a. that the null hypothesis is a reasonable explanation of the data. b.that the null hypothesis is a poor explanation of the data. c. that the null hypothesis is true. d.that the alternative hypotheses is true. In this situation, the alternative hypothesis is a. one-tailed b. two-tailed c.more than two-tailed

August 19, 2019 in /by

13.Use the following information to answer the questions below:Research published in the journal Cough in 2012 examined the records of 241 children who visited a pediatrician with a severe cough. They found that coughing stopped in 47% of the 101 children who were treated with the non-opiate cough suppressant levodropropizine compared with 28% of the […]

 

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77.A random sample of 225 full time students at a large two-year college is taken to estimate the amount they spent on text books this semester. The sampled students spent an average of $200 with a standard deviation of $75. Thus, a 95% confidence interval for the average amount spent by all full time students at that school would be: a. $200 ± $0.33 b. $200 ± $5 c.$200 ± $10 d.$200 ± $75 8.A marketing researcher is studying ways to entice customers in line at a cash register to buy impulse items like candy near the register. He conducts an experiment in which a customers are randomly selected to either have the cashier ask “would you like to buy anything else?” before completing the transaction or instead have the cashier ask “would you like your receipt in the bag?” The customers will also be photographed in the parking lot to see whether they drive an inexpensive or expensive car and that information will be examined to see if the value of the car might partially explain spending more or less money on impulse items – in addition to the question the cashier asks. This situation would not follow ethical guidelines for experiments because a.It is a waste of time to look at the value of the person’s car. b.There was no opportunity for the customer to give informed consent. c.The researcher would not be blind to which treatment the subject received. d.Trying to find ways to entice people to do things is itself unethical. 9.33% of adult women in the State of Washington have a Bachelor’s degree. Which is more likely? a. At least 40% of a random sample of 100 adult women in Washington have a Bachelor’s degree b.At least 40% of a random sample of 1000 adult women in Washington have a Bachelor’s degree c.It doesn’t matter if there are 100 or 1000 adult women in the sample, the chances would be the same 10.The Gallup Poll recently conducted a survey of 1500 randomly selected American adults and found that 34% of them were “enthusiastic about and committed to their work and workplace.” They reported a 95% confidence interval of 34% ± 3%. If they had reported a confidence statement of 34% ± 1% for this same poll, then the confidence level a. would have been greater than 95% b. would have been less than 95% c.would still be 95% d. could be greater than 95% or less than 95% 11.The chance that a randomly selected two-year old child is a girl is 0.48. The chance that a randomly selected two-year old child has an ear infection is 0.04. This says the chance that a randomly selected two-year old child is a girl with an ear infection a. = 0.0096 (= 0.48 times 0.02) b.may be higher or lower than 0.0096 depending on whether gender and having an ear infection are mutually exclusive c.may be higher or lower than 0.0096 depending on whether gender and having an ear infection are independent 12.Suppose you want to judge if a Department store is doing more business than usual this month. Which method below would help to remove the seasonal effect seen in retail sales in December? a.Check whether December sales beat November sales. b.Check whether December sales beat November sales by more than you’d expect due to chance variability . c.Check whether December sales beat the average of November and January sales. d. Check whether December sales beat the sales from last December. . The sampled students spent an average of $200 with a standard deviation of $75. Thus, a 95% confidence interval for the average amount spent by all full time students at that school would be: a. $200 ± $0.33 b. $200 ± $5 c.$200 ± $10 d.$200 ± $75 8.A marketing researcher is studying ways to entice customers in line at a cash register to buy impulse items like candy near the register. He conducts an experiment in which a customers are randomly selected to either have the cashier ask “would you like to buy anything else?” before completing the transaction or instead have the cashier ask “would you like your receipt in the bag?” The customers will also be photographed in the parking lot to see whether they drive an inexpensive or expensive car and that information will be examined to see if the value of the car might partially explain spending more or less money on impulse items – in addition to the question the cashier asks. This situation would not follow ethical guidelines for experiments because a.It is a waste of time to look at the value of the person’s car. b.There was no opportunity for the customer to give informed consent. c.The researcher would not be blind to which treatment the subject received. d.Trying to find ways to entice people to do things is itself unethical. 9.33% of adult women in the State of Washington have a Bachelor’s degree. Which is more likely? a. At least 40% of a random sample of 100 adult women in Washington have a Bachelor’s degree b.At least 40% of a random sample of 1000 adult women in Washington have a Bachelor’s degree c.It doesn’t matter if there are 100 or 1000 adult women in the sample, the chances would be the same 10.The Gallup Poll recently conducted a survey of 1500 randomly selected American adults and found that 34% of them were “enthusiastic about and committed to their work and workplace.” They reported a 95% confidence interval of 34% ± 3%. If they had reported a confidence statement of 34% ± 1% for this same poll, then the confidence level a. would have been greater than 95% b. would have been less than 95% c.would still be 95% d. could be greater than 95% or less than 95% 11.The chance that a randomly selected two-year old child is a girl is 0.48. The chance that a randomly selected two-year old child has an ear infection is 0.04. This says the chance that a randomly selected two-year old child is a girl with an ear infection a. = 0.0096 (= 0.48 times 0.02) b.may be higher or lower than 0.0096 depending on whether gender and having an ear infection are mutually exclusive c.may be higher or lower than 0.0096 depending on whether gender and having an ear infection are independent 12.Suppose you want to judge if a Department store is doing more business than usual this month. Which method below would help to remove the seasonal effect seen in retail sales in December? a.Check whether December sales beat November sales. b.Check whether December sales beat November sales by more than you’d expect due to chance variability . c.Check whether December sales beat the average of November and January sales. d. Check whether December sales beat the sales from last December.

August 19, 2019 in /by

7.A random sample of 225 full time students at a large two-year college is taken to estimate the amount they spent on text books this semester. The sampled students spent an average of $200 with a standard deviation of $75. Thus, a 95% confidence interval for the average amount spent by all full time students […]

 

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