Alex’s times for running a mile are Normally distributed with a mean time of 5.28 minutes and a standard deviation of 0.38 seconds. Chris’s times for running a mile are Normally distributed with a mean time of 5.45 seconds and a standard deviation of 0.2 seconds. Ten of Alex’s times and 15 of Chris’s times are randomly selected. Let represent the difference in the mean times for Alex and Chris. Which of the following represents the standard deviation of the sampling distribution for ?0.090.130.170.18 Alex's times for running a mile are Normally distributed with a mean time of 5.28 minutes and a standard deviationof 0.38 seconds. Chris's times for running a mile are Normally distributed with a mean time of 5.45 seconds and astandard deviation of 0.2 seconds. Ten of Alex's times and 15 of Chris's times are randomly selected. Let ī, -ī.represent the difference in the mean times for Alex and Chris. Which of the following represents the standarddeviation of the sampling distribution for -,?'A0.090.130.170.18

Let n1 be the sample size of alex n2 be the sample size of chris Given n1=10, n2=15 , standard…

Answered: Alex’s times for running a mile are…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Alex’s times for running a mile are Normally distributed with a mean time of 5.28 minutes and a standard deviation of 0.38 seconds. Chris’s times for running a mile are Normally distributed with a mean time of 5.45 seconds and a standard deviation of 0.2 seconds. Ten of Alex’s times and 15 of Chris’s times are randomly selected. Let represent the difference in the mean times for Alex and Chris. Which of the following represents the standard deviation of the sampling distribution for ?

0.09

0.13

0.17

0.18

Alex's times for running a mile are Normally distributed with a mean time of 5.28 minutes and a standard deviation
of 0.38 seconds. Chris's times for running a mile are Normally distributed with a mean time of 5.45 seconds and a
standard deviation of 0.2 seconds. Ten of Alex's times and 15 of Chris's times are randomly selected. Let ī, -ī.
represent the difference in the mean times for Alex and Chris. Which of the following represents the standard
deviation of the sampling distribution for -,?
'A
0.09
0.13
0.17
0.18

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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