Question

Twelve teachers attended a seminar on mathematical problem solving. Their attitudes were measured before and after the seminar. A positive number change attitude indicates that a teacher’s attitude toward math became more positive. The twelve change scores are as follows: 3, 8, -1, 2, 0, 5, -3, 1, -1, 6, 5, -2

a) The mean is: (Round to two decimal places).

b) The sample standard deviation is (Round to two decimal places).

c) The first quartile is:

d) The median is:

e) The third quartile is:

f) Find the change score that corresponds to 3 standard deviations above the mean. (Round to the nearest whole number).

g) If a teacher experiences a change score of 4, how many standard deviations above the mean is this score? (Round to two decimal places).

Answer 1