Question

Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 65.4 beats per minute. Four of the pulse rates are 57, 55, 62, and 83. Find the missing value.

Answer 1

Answer:

The missing value = 70

Explanations:

Let the missing value be represented by x

Number of pulse rates = 5

Total value of the pulse rates = 57 + 55 + 62 + 83 + x

Total value of the pulse rates = 257 + x

Mean = 65.4

Mean = (Total value of the pulse rates) / (Number of pulse rates)

65.4 = (257 + x) / 5

Cross multiply:

65.4(5) = 257 + x

327 = 257 + x

x = 327 - 257

x = 70

The missing value = 70