3.In an elementary school, it was claimed that Mrs. Smith's students did substantially better than the rest of the school on a particular exam.The school had an average exam score of 79.23 while Mrs. Smith's 23 students had an average score of 82.6 with a sample standard deviation of 3.Was the higher average due to chance?

4.The same exam was given to all the students in the sixth grade, but they were divided into 4 classrooms.Each classroom had a different distraction taking place except for Room 1 that was the control group and free of noise.Using the scores ranging from 0 to 60 of the students below, state a conclusion about the nature of testing practices used.

Control- 31,16, 11, 19, 43, 49, 4, 11, 34, 39, 60, 40, 57, 59, 43

60 Degrees- 53, 39, 41, 39, 54, 41, 9, 17, 13, 8, 32, 29, 35, 45, 42

Classical Music- 27, 36, 32, 14, 40, 60, 47, 2 27, 5, 55, 53, 27, 4, 50

Next to Cafeteria- 29, 18, 16, 20, 7, 12, 20, 45, 33, 53, 23, 24, 18, 49, 29