Test Whether He Given Claim Is Supported or Not Supported

Multiple Choice

Test whether he given claim is supported or not supported using a 0.05 significance level. Assume that the sample has been randomly selected from a population with a normal distribution.
-A researcher wants to check the claim that convicted burglars spend an average of 18.7 months in jail. She takes a random sample of 11 such cases from court files and finds that x = 20.8 months and s = 7.4 months. Use a 0.05
Significance level to test whether the claim that that the average time is not 18.7 months is supported or not
Supported.

A) supported
B) not supported