Answered: What kind of tail is it? Is it one…

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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Question

Nike has produced new running shoes. nike made them run around a track. to analyze the shoes, they made the first test group wear new shoes and the second test group wear old shoes. They are eight people in the first group and 5 in the second. Of the 8 people in group one, the average was 95.7 sec and a standard deviation of 2.15 sec. of the 5 in the second group, the average was 104.98 sec. and a standard deviation of 1.82 sec.

Assume normal distribution. Do a hypothesis test of 0.05 significance level. Based on the hypothesis, does group 1 have more variability?

What kind of tail is it? Is it one sample or two sample?

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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