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Please math experts I am truly struggling. Please if you can show work thank you so much.

Please math experts I am truly struggling. Please if you can show work thank you so-example-1

1 Answer

8 votes

Answer:

1)

66 - 80
2)

59 - 87
3)
53 - 94

standard deviation is a measure of how many data points different from the mean each individual data point is.
if the standard deviation is 7, the range is +7 and -7 68% of the time
the data will be within 2 standard deviations +14 -14 95% of the time
the data will be within 3 standard deviations +21 -21 99.7% of the time

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