A certain group of test subjects had pulse rates with a mean of 70.7 beats per m

Question

A certain group of test subjects had pulse rates with a mean of 70.7 beats per minute and a standard deviation of 10.9 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 42.5 beats per minute significantly low or significantly high? Significantly low values are nothing beats per minute or lower. (Type an integer or a decimal. Do not round.) Significantly high values are nothing beats per minute or higher. (Type an integer or a decimal. Do not round.) Is a pulse rate of 42.5 beats per minute significantly low or significantly high?

Explanation / Answer

as signifcant values are 2 std deviation from mean

hence Significantly low values =mean-2*std deviation =70.7-2*10.9=48.9

Significantly high value=mean+2*std deviation =70.7+2*10.9=92.5

pulse rate of 42.5 beats per minute is significantly low

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