Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.

QUESTION

One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the teachers were measured...

One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The twelve change scores are as follows.

4; 8; −1; 2; 0; 5; −3; 1; −1; 6; 5; −2

  • Part (a)
  • What is the mean change score? (Round your answer to two decimal places.)
  • Part (b)
  • What is the standard deviation for this sample? (Round your answer to two decimal places.)
  • 3.54
Show more
LEARN MORE EFFECTIVELY AND GET BETTER GRADES!
Ask a Question