Entries by Grace Wahito

The mean incubation time for a type of fertilized egg kept at 100.7

March 26, 2020 in /by

The mean incubation time for a type of fertilized egg kept at 100.7°F is 20 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 11 day. (a) What is the probability that a randomly selected fertilized egg hatches in less than 18 days? (b) What is the probability that a randomly selected […]

 

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The amounts a soft drink machine is designed to dispense for each drink

March 26, 2020 in /by

The amounts a soft drink machine is designed to dispense for each drink are normally distributed, with a mean of 11.9 fluid ounces and a standard deviation of 0.3 fluid ounce. A drink is randomly selected. (a) Find the probability that the drink is less than 11.7 fluid ounces. (b) Find the probability that the drink is […]

 

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Find the probability and interpret the results

March 26, 2020 in /by

Find the probability and interpret the results. If convenient, use technology to find the probability. The population mean annual salary for environmental compliance specialists is about $62,000. A random sample of 45 specialists is drawn from this population. What is the probability that the mean salary of the sample is less than $59,000? Assume sigma = $6,400. […]

 

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The mean height of women in a country (ages20-29) is 64.3 inches

March 26, 2020 in /by

The mean height of women in a country (ages20-29) is 64.3 inches. A random sample of 75 women in this age group is selected. What is the probability that the mean height for the sample is greater than 65 inches? Assume sigma =2.78. The probability that the mean height for the sample is greater than 65 inches is?   Looking […]

 

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