Answered: he Survey of Study Habits and Attitudes…

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 Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitude toward school. Scores range from 0 to 200. The mean score for college students is about 115, and the standard deviation is about 30. A teacher suspects that the mean μμ for older students is higher than 115. She gives the SSHA to an SRS of students who are at least 30 years old. Suppose we know that scores in the population of older students are Normally distributed with standard deviation σσ = 30.

State the null and alternative hypotheses for the study of older students' attitudes. Note: Type in "mu" as the substitute for μμ and "!=" for ≠≠.

H0H0:
HaHa:

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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