Question

1) Mean pulse rate of

a population is believed to be 70 beats per minute with a standard deviation of 8 beats. Calculate the minimum size of the sample to verify this, if allowable error L = + 1 beat at 5 % risk and with 95% CL.​

Answer 1

Answer:

research study measured the pulse rates of 57 college men and found a mean pulse rate of 70.4211 beats per minute with a standard deviation of 9.9480 beats per minute. Researchers want to know if the mean pulse rate for all college men is different from the current standard of 72 beats per minute.

1. Check assumptions and write hypotheses

Pulse rates are quantitative. The sampling distribution will be approximately normally distributed because .

This is a two-tailed test because we want to know if the mean pulse rate is different from 72.

2. Calculate the test statistic

Explanation:

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Answer 2

Answer:

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