Question
Find the range and the variance (correct to one decimal place).
77, 92, 93, 93, 98
(a) Find the range.
(b) Find the variance.
77, 92, 93, 93, 98
(a) Find the range.
(b) Find the variance.
Answers
PsyDAG
A. Range = highest score - lowest
B. Find the mean first = sum of scores/number of scores
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
I'll let you do the calculations.
B. Find the mean first = sum of scores/number of scores
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
I'll let you do the calculations.