Answered: 34. Last year the average age of our…

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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34. Last year the average age of our clients was 30, and this year we believe it has decreased. We took a sample of 49 clients and found the average age of the sample was 25 and the standard deviation of the sample was 10. To find the p-value do we look up the test statistic on the t-table or the Z-table?

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Z-table

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t-table

35. Suppose we used StatCrunch to find the exact test statistic for a two-tailed (not equal to) hypothesis test for the mean, and it turned out to be 1.28. The population standard deviation is known and we have a normal distribution. What is the p-value?

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.2006

.3997

.1003

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(I NEED BOTH PLEASE, I BELIEVE 35 IS A BUT I AM NOT FULLY CERTAIN. THANK YOU)

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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