SOLUTION: A certain group of test subjects had pulse rates with a mean of
77.4
77.4 beats per minute and a standard deviation of
11.5
11.5 beats per minute. Use the range rule of thumb
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Question 1124939: A certain group of test subjects had pulse rates with a mean of
77.4
77.4 beats per minute and a standard deviation of
11.5
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
140.4
140.4 beats per minute significantly low or significantly high?
Answer by fcabanski(1391) (Show Source): You can put this solution on YOUR website!
Range Rule of Thumb - The standard deviation will be range/4. In other words, the range will be 4 * SD.
Significantly low is below the "usual" range, while sig high is above the "usual" range. The "usual" range is 2 SD above and 2 SD below the mean.
The "usual" range for this situation is 77.4 - 2(11.5) to 77.4 + 2 (11.5) = 54.4 to 100.4.
Significantly low will be less than 54.4.
Sig high will be greater than 100.4.
140.4 is significantly high.
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