A sample of 10 students at HVCC found the mean age is 23 standard deviation is 1.5. Historical data shows the mean age is 21. Is there an increase in the average age of a HVCC student at the .01 significance level

Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-responsequestion. there are 15 questions on the test and the students have been given 55 minutes to complete itwhich value could replace x in the table? 5507-m23-m8(15-m)8(15)-m