73 72 67 74 78 84 79 71 76 76

79 81 75 80 78 76 78
In terms of differences in heart rates, interpret these data using the following:the range, (b) the variance, and (c) the standard deviation

Range = highest score - lowest.

Find the mean = 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.