Five pulse rates are randomly selected from a set of measurements. The five puls
ID: 3199191 • Letter: F
Question
Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of
75.4 beats per minute. Four of the pulse rates are
66,
88,
90, and
56.
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.
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.)
Explanation / Answer
(a) Here as we know by definition of mean, if the missing value is x
(x + 66 + 88 + 90 + 56)/5 = 75.4
x = 75.4 * 5 - 66 - 88 - 90 - 65 = 68
(b) Here there are n -1 values can freely assigned before the raminaing values are determined.
Here Number of freedom = n-1
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