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Section 3.2 Homework
8.
A certain group of test subjects had pulse rates with a mean of 84.2 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 77.2 beats per minute significantly low or significantly high?
Significantly low values are _____beats per minute or higher.
Significantly high values are ____ beats per minute or higher.
Is a pulse rate of 77.2 beats per minute significantly low or significantly high?
- Significantly high, because it is more than two standard deviations above the mean.
- Significantly low, because it is more than two standard deviations below the mean.
- Neither, because it is within two standard deviations of the mean.
- It is impossible to determine with the information given.