Five pulse rates are randomly selected from a set of measurements. The five puls

Question

Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 73.8 beats per minute. Four of the pulse rates are 64, 72, 75, and 80. a. Find the missing value b. Suppose that you need to create a list of n values that have a specific known mean. Some of the n values can be freely selected. How many of the n values can be freely assigned before the remaining values are determined? (The result is referred to as the number of degrees of freedom.) a. The missing value is beats per minute. (Type an integer or a decimal. Do not round.)

Explanation / Answer

a) Let missing value is x. Then,

(64 + 72 + 75 + 80 + x)/5 = 73.8

291 + x = 369

x = 369 - 291

x = 78

b) Values that can be freely assigned = n - 1

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