Question
QUESTION 9 National Science Foundation is estimating the average total salary of full professors in the math department. Data were randomly collected from 20 professors
QUESTION 9
National Science Foundation is estimating the average total salary of full professors in the math department. Data were randomly collected from 20 professors and the 95% confidence interval for the mean was calculated to be ($95,201, $108,030). What additional assumption is necessary for this confidence interval to be valid?
A. None. The Central Limit Theorem applies.
B. The sample standard deviation is less than the degrees of freedom.
C. The population of total salaries of full professors in math is approximately normally distributed.
D. The distribution of the sample means is approximately normal.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access with AI-Powered Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started