What is the probability that a randomly chosen freshman

Assignment Help Basic Statistics

Reference no: EM13614802

A study of college freshmen's study habits found that the time (in hours) that college freshmen use to study each week is approximately normally distributed with a mean of 7.2 hours and a standard deviation of 5.3 hours.

a.) What is the probability that a randomly chosen freshman studies more than twice the average number of hours? Include a sketch as part of your answer.

b.) Describe the sampling distribution of the mean x-bar of a sample of 55 randomly selected freshmen.

c.) What are the mean and standard deviation for the average number of hours x-bar spent studying by a SRS of 55 freshmen?

d.) What is the probability that the average number of hours spent studying of a SRS of 55 students is greater than 14.4 hours?

e.) Would your answers to parts a.) and d.) be affected if the distribution of numbers of hours freshmen study were distinctly non-normal? Explain briefly.

Reference no: EM13614802

Questions Cloud

Digital audio works inc warrants its products for 1year the : digital audio works inc. warrants its products for 1year. the estimated product warranty is 1frac12 of sales. assume

Dec 31 recorded the estimated income tax liabilityfor the : illustrate the effects on the accounts and financialstatements of recording the following selected transactions of

Perform linear regression analysis to obtain an equation to : perform linear regression analysis to obtain an equation to predict age at death given a specific cholesterol level.

A 300 kg mass is attached to this spring and released from : an unusual spring has a restoring force of magnitude f 2.0 nm x 1.0 nm2 x2 where x is the stretch of the spring from

What is the probability that a randomly chosen freshman : a study of college freshmens study habits found that the time in hours that college freshmen use to study each week is

A 100-kg mass is attached to a spring hanging vertically : a 1.00-kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. the spring

What is the mean of the sampling distribution of p-hat the : an opinion poll asks a sample of 500 adults a srs whether they favor giving parents of school-age children vouchers

Which of the following account balance is shown on : choose the correctbest option from given mcqs and put youranswer in tabular form as drawn above.1. which of the

The magnitude of the drag force on a 200-kg object is : the magnitude of the drag force on a 20.0-kg object is proportional to its speed. the object has a terminal velocity 80

User Account

All Pages