A certain group of test subjects had pulse rates with a mean of 81.681.6 beats p

Question

A certain group of test subjects had pulse rates with a mean of

81.681.6

beats per minute and a standard deviation of

11.411.4

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

84.484.4

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

84.484.4

beats per minute significantly low or significantly high?

A.

Significantly low comma because it is less than two standard deviations below the mean.Significantly low, because it is less than two standard deviations below the mean.

B.

Neither comma because it is within two standard deviations of the mean.Neither, because it is within two standard deviations of the mean.

C.

Significantly high comma because it is greater than two standard deviations above the mean.Significantly high, because it is greater than two standard deviations above the mean.

D.

It is impossible to determine with the information given.

Explanation / Answer

Significantly low values = 81.6 - 2(11.4) = 58.8

Significantly high values = 81.6 + 2(11.4) = 104.4

Option B is correct.

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