An education specialist was studying SAT math scores at a lo

An education specialist was studying SAT math scores at a local university. She found the following 95% confidence interval for the population mean score for SAT math: (450, 550). Suppose that a significance test at Ho:population mean = 475 versus Ha: population mean does not equal 475. The p-value for this test was 0.14. Which of the following statements accurately describes this situation?

Solution

Answer is D

The population mean score for SAT Math is practically (but not statistically) different from 475.

Since pvalue is very high we conclude that it is not statistically significant.

(550-450)/2 = 50

Which is very large hence it is practically significant.