Question

Claim: The standard deviation of pulse rates of adults males is more than 12 bpm. For a random sample of 171 adult males, the pulse rates have a standard deviation of 13.4 bmp. .

1. what  is the original claim in symbolic form?

2. what is the null and alternative hypothesis?

Answer 1

Let X be a random variables representing pulse rates of adults males.

1.

Claim - The standard deviation of pulse rates of adults males is more than 12 bpm.

mathmatically , claim - Population standard deviation() > 12bpm

2.

Ho : Population standard deviation ( ) = 12

Ha : Population standard devaition ( ) > 12

we are trying to test above hypothesis based on random sample of size(n) 171 adult males the sample standard deviation(sx) is 13.4bpm.

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