Teen drivers (those aged 15-19) spend an average of 25 minutes behind the wheel each day. Assume that the standard deviation is known to be 7.6 minutes. You randomly select 35 teenage drivers. a) Can you use the Normal model to describe the sampling distribution of sample means? Why or why not? b) What is the mean of the sampling distribution? (give number only) c) What is the standard deviation of the sampling distribution? (number only, to 4 decimal places)
Teen drivers (those aged 15-19) spend an average of 25 minutes behind the wheel each day. Assume that the standard deviation is known to be 7.6 minutes. You randomly select 35 teenage drivers. a) Can you use the Normal model to describe the sampling distribution of sample means? Why or why not? b) What is the mean of the sampling distribution? (give number only) c) What is the standard deviation of the sampling distribution? (number only, to 4 decimal places)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Problem 1P
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Transcribed Image Text:Teen drivers (those aged 15-19) spend an average of 25 minutes behind the wheel
each day. Assume that the standard deviation is known to be 7.6 minutes. You
randomly select 35 teenage drivers.
a) Can you use the Normal model to describe the sampling distribution of sample
means? Why or why not?
b) What is the mean of the sampling distribution? (give number only)
c) What is the standard deviation of the sampling distribution? (number only, to 4
decimal places)
d) You take a random sample of 35 teen drivers and want to find the probability that
the mean time they spend driving each day is less than 21.5 minutes. What z-score
should you use? (give your answer to 3 decimal places)
e) You take a random sample of 35 teen drivers. What is the probability that the
mean time they spend driving each day is less than 21.5 minutes? (give your answer to 4
decimal places)
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