Entries by Grace Wahito

Find the indicated probabilities using the geometric​ distribution,

March 9, 2020 in /by

Find the indicated probabilities using the geometric​ distribution, the Poisson​ distribution, or the binomial distribution. Then determine if the events are unusual. If​ convenient, use the appropriate probability table or technology to find the probabilities. Assume the probability that you will make a sale on any given telephone call is 0.15. Find the probability that […]

 

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The table below shows the results of a survey

March 9, 2020 in /by

Question The table below shows the results of a survey that asked 2850 people whether they are involved in any type of charity work. A person is selected at random from the sample. Complete parts​ (a) through​ (e). Frequently Occasionally Not At All Total Male 225 455 795 1475 Female 202 430 743 1375 Total 427 885 […]

 

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college students say they use credit cards because of the rewards program.

March 9, 2020 in /by

39​% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is​ (a) exactly​ two, […]

 

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a random sample of style=

March 9, 2020 in /by

n a random sample of  style=”color:rgb(0,0,0);”>1919 ​people, the mean commute time to work was 34.434.4 minutes and the standard deviation was 7.37.3 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 9999​% confidence interval for the population mean muμ. What is the margin of error of muμ​? Interpret the results.   […]

 

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