Realtor elaine snyderman took a random sample of 12 homes in a prestigious suburb of chicago and found the average appraised market value to be $780000 and the standard deviation was $49000. test the...

Realtor elaine snyderman took a random sample of 12 homes in a prestigious suburb of chicago and found the average appraised market value to be $780000 and the standard deviation was $49000. test the hypothesis that for all homes in the area, the mean appraised value is $825000 against the alternative that it is less than $825000. use the 0.05 level of significance