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A certain group of test subjects had pulse rates with a mean of 83.4 beats per...

A certain group of test subjects had pulse rates with a mean of 83.4 beats per minute and a standard deviation of 11.5 beats per minute. Use the range rule of thumb to identify the limits separating values that are significantly low or significantly high. Is a pulse rate of 56.4 beats per minute significantly low or significantly​ high?

Math   Statistics-And-Probability   
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Answer #1

Given that,

mean = 83.4 beats per minute and

standard deviation = 11.5 beats per minute

z-score for the score of x = 56.4 beats per minute

since, z-score = -2.35 is less than -2, we can say that, pulse rate of 56.4 beats per minute is significantly low.

Note: if the z-score of a value is less than -2 then this value is significantly low and if the z-score is greater than 2 then this value is significantly high.

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