1 What is the population proportion 2 What is the best approximate for the

1 what is the population proportion 2 what is the

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1. What is the population proportion ? 2. What is the best approximate for the population proportion? 3.Compute a 90% confidence interval for the proportion of all PhD graduates who fail to find a job.
Question8 : random sample of size 36 working mothers revealed that they watch TV in a mean of 40 minutes per day with standard deviation of 9 minutes? 1. What is the population mean of watching time? 2. What is the point estimate for the population mean ? 3. Construct a 95% confidence interval for the population mean?
Question9: A simple random sample of 10 people from a certain population has a mean age of 27. Can we conclude that the mean age of the population is not 30? The variance is known to be 20. Let α = .05
Question10: A simple random sample of 10 people from a certain population has a mean age of 27. Can we conclude that the mean age of the population is less than 30? The variance is known to be 20. Let α = .05.
Qustion11: A national magazine claims that the average college student watches more TV than the general public. The national average is 29.4 hours per week, with a standard deviation of 2 hours. A sample of 30 college students has a mean of 27 hours. Is there enough evidence to support the claim at α = 0.01?

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