A student wants to test her hypothesis she gives each of her students an IO test. She finds that the average IQ score is 115 and the standard deviation for the class is 30. There are 22 students in the class. She also knows that the population average IQ is 100 points.

Question

A student wants to test her hypothesis she gives each of her students an IO test. She finds that the average IQ score is 115 and the standard deviation for the class is 30. There are 22 students in the class. She also knows that the population average IQ is 100 points.
Ho:p=115
Ha=p>115.
What is the right formula and calculate the test statistics

MathGuru · Answer

How about a one-sample t-test? Your sample size is fairly small.

Fill in what you know into the formula to calculate the test statistic.

population mean = 100
sample mean = 115
standard deviation = 30
sample size = 22

I'll let you take it from here.