Ask a New Question
Menu

Consider the following test scores obtained by a class.

Test score

90

80

70

60

50

Frequency

1

4

11

6

2

Find the standard deviation (rounded to the nearest hundredth).

1 answer

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.

Standard deviation = square root of variance

I'll let you do the calculations.
Similar Questions
  1. A class obtained the following scores on a test.Test Score Frequency 90 2 80 5 70 10 60 3 50 3 40 2 Find the mean, the median,
    1. answers icon 2 answers
  2. Your test scores in one class are 78and 84 . What possible scores can you earn on your next test to have a test average between
    1. answers icon 1 answer
  3. Your test scores in one class are80 and 84. What possible scores can you earn on your next test to have a test average between
    1. answers icon 1 answer
  4. Consider the following test scores obtained by a class.Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard
    1. answers icon 1 answer
more similar questions