Problem 4

A college professor claims that the standard deviation for students taking a statistics test is less than 30.Twenty tests are randomly selected and the standard deviation is found to be 28.8.Test this professor's claim at the a = 0.05 level. Use the P-value

Step 1:

State your hypothesis

Type of Distribution:__________________ and type of Test:________________________

Step 2 - Find your critical value- Don't forget to draw, shade, and label

Step 3 - Find the test value. Please show your work.

Step 4 - Make your decision and explain why

Step 5 - Summarize using complete sentences.