Need Help with D E F Use the following information to answer the following exercises: Suppose that a recentarticle stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. Astudy was then done to see if the mean time has increased in the new century. A randomsample of 26 first-time convicted burglars in a recent year was picked. The mean length oftime in jail from the survey was three years with a standard deviation of 1.8 years. Supposethat it is somehow known that the population standard deviation is 1.5. Conduct ahypothesis test to determine if the mean length of jail time has increased.Assume the distribution of the jail times is approximately normal.a. Is this a test of means or proportions?_____________________________b. Is σ known and, if so, what is it?_____________________________c. Since both ? and ?? are given, which should be used? In a complete sentence, why.d. State the distribution to use for the hypothesis test.e. State the null and alternative hypotheses.?0: ____________________ ??: ____________________f. Find the ? − ?????, conduct the hypothesis test and state your conclusion.? − ????? = _________________

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Need Help with D E F

Use the following information to answer the following exercises: Suppose that a recent
article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A
study was then done to see if the mean time has increased in the new century. A random
sample of 26 first-time convicted burglars in a recent year was picked. The mean length of
time in jail from the survey was three years with a standard deviation of 1.8 years. Suppose
that it is somehow known that the population standard deviation is 1.5. Conduct a
hypothesis test to determine if the mean length of jail time has increased.
Assume the distribution of the jail times is approximately normal.
a. Is this a test of means or proportions?
_____________________________
b. Is σ known and, if so, what is it?
_____________________________
c. Since both ? and ?? are given, which should be used? In a complete sentence, why.
d. State the distribution to use for the hypothesis test.
e. State the null and alternative hypotheses.
?0: ____________________ ??: ____________________
f. Find the ? − ?????, conduct the hypothesis test and state your conclusion.
? − ????? = _________________

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