Purchase Solution

# Hypothesis Testing

Not what you're looking for?

The Problem Solving Inventory (PSI) has a normal distribution with mean = 90 and standard deviation = 15. A researcher suspects that the mean for female students is higher than 90. She takes an SRS of 25 female students and gives PSI. Suppose we know that scores in the population of female students are normally distributed with standard deviation = 15.

(a) State the null and alternative hypotheses for the study of female students. (1 pt)

(b) Suppose that the sample mean of 25 students is 91.5. What would be the test statistic Z?

##### Solution Summary

The expert examines hypothesis testing for normal distribution. The solution answers the question(s) below

##### Solution Preview

a.)
Null hypothesis:
Ho: The female students have >=90
(If it's greater than 90 then accept Ho)
H1: The female students have < ...

Solution provided by:
###### Education
• MSc , Pune University, India
• PhD (IP), Pune University, India
###### Recent Feedback
• " In question 2, you incorrectly add in the \$3.00 dividend that was just paid to determine the value of the stock price using the dividend discount model. In question 4 response, it should have also been recognized that dividend discount models are not useful if any of the parameters used in the model are inaccurate. "
• "feedback: fail to recognize the operating cash flow will not begin until the end of year 3."
• "Great thanks"
• "Perfect solution..thank you"

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.