A navigation software reports the mean commuting time between two points as 79.2 minutes, with a standard deviation of 6.3 minutes. We'd like to analyze the average commuting time for different sample sizes and see how the variance of sample mean changes with the sample size. (a) If the sample size is changed from 324 to 49, s (Type integers or decimals. Do not round.) v from to (b) If the sample size is changed from 81 to 196, s? from to (Type integers or decimals. Do not round.)

A navigation software reports the mean commuting time between two points as 79.2 minutes, with a standard deviation of 6.3 minutes. We'd like to analyze the average commuting time for different sample sizes and see how the variance of sample mean changes with the sample size. (a) If the sample size is changed from 324 to 49, s (Type integers or decimals. Do not round.) v from to (b) If the sample size is changed from 81 to 196, s? from to (Type integers or decimals. Do not round.)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 5.5 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 24 engines and the mean pressure was 5.7 pounds/square inch with a variance of 0.49. A level of significance of 0.01 will be used. Assume the population distribution is approximately normal. Make the decision to reject or fail to reject the null hypothesis. Dain
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