The pulse rates of 180 randomly selected adult males vary from a low o 40 bpm to a high of 120 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 90% confidence that the sample mean is within 3 bpm of the population mean. Complete parts (a) through (c) below.

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A: Here we have to explain How can we know that the sample size of A is less than B

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A: Given, n = 10 N = 1500 Number of sample size = 3

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A: Given that   The sample covariance Sxy measures

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A: Increase power

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Q: rationale for using n – 1 to compute the sample variance

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Q: QUESTION 1 Degree of freedom relates to the sample size (n) in what way? df= 2n df=n df=n-1 df= 10

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Q: What test can we use to determine the sample size needed?

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A:

Q: When does random sampling occur?

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Q: What are the practical Reasons for learning how to use the formula in determining sample size?

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Q: Obtain the standard error of difference of sample proportions.

A: ANSWER: For the given data,

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