Question

The standard Deviation of pulse rates of adult males is less than 12 Bpm. For a random sample of 126 adult males, the pulse rates have a standard deviation of 10.8 bpm. Find the value of test statistic

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Answer 1

solution :- Given :- r = n = S = 12 Bpm 126 10.8 Bpm r2 s2 = = 144 116.64 Hypothesis Ho: 02 = 144 Ha! O2 < 144 computed as follows: Test statistic The chi-squared stalishe is x² = (n-1) 5² 02 (126-1) 116.64 144 x² = 101.25 Jol.25