A certain group of test subjects had pulse rates with a mean of 82.8 beats per m

Question

A certain group of test subjects had pulse rates with a mean of 82.8 beats per minute and a standard deviation of 12.2 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 87.2 beats per minute significantly low or significantly high? Significantly low values are beats per minute or lower. (Type an integer or a decimal. Do not round.) Significantly high values are beats per minute or higher. (Type an integer or a decimal. Do not round.) Is a pulse rate of 87.2 beats per minute significantly low or significantly high? A. Significantly low, because it is less than two standard deviations below the mean. B. Significantly high, because it is greater than two standard deviations above the mean. C. Neither, because it is within two standard deviations of the mean. D. It is impossible to determine with the information given.

Explanation / Answer

Mean = 82.8

SD = 12.2

A) significant low value = mean - 2*SD = 82.8 - 2*12.2 = 58.4

B) significant high value = mean + 2*SD = 82.8 + 2*12.2 = 107.2

C) Option-C) Neither because it is within two standard deviations of mean.

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