Question: 1.The population proportion is 0.40. What is the probability that a sample proportion will be exceed 0.44 for n = 200? 2. A population has

1.The population proportion is 0.40. What is the probability that a sample proportion will be exceed 0.44 for n = 200?

2. A population has a mean of 180 and a standard deviation of 50. Suppose a sample of size 36 is selected and x is used to estimate .

(A). What is the probability that the sample mean will be within 7 of the population mean?

(B). What is the probability that the sample mean will exceed 185?

3. Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 49 weekly reports showed a sample mean of 16.5 customer contacts per week. The sample standard deviation was 5.2.

(A). Provide 80% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.

(B). Provide 99% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.

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