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Name: The average number of miles a person drives per day is 24. A researche
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Description: The average number of miles a person drives per day is 24. A researcher wishes to see if people over age 60 drive less than 24 miles per day. She selects a random sample of 28 drivers over the age of 60 and finds that the mean number of miles driven

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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The average number of miles a person drives per day is 24. A researcher wishes to see if people over age 60 drive less than 24 miles per day. She selects a random sample of 28 drivers over the age of 60 and finds that the mean number of miles driven is 23.2. The population standard deviation is 3.4 miles. At α=0.10, is there sufficient evidence that those drivers over 60 years old drive less than 24 miles per day on average? Assume that the variable is normally distributed. Use the critical value method with tables.

A.) State the hypotheses and identify the claim with the correct hypothesis.

H₀:

H₁:

B.) Find the critical value(s).

C.) Compute the test value.

D.) Make the decision.

________ the null hypothesis.

E.) Summarize the results.

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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