Question

1). The Fox TV network is considering replacing one of its prime-time crime investigation shows with a new family-oriented comedy show. Before a final decision is made, network executives commission a sample of 500 viewers. After viewing the shows, 150 indicated they would watch the new show and suggested it replace the crime investigation show.

1. Estimate the value of the population proportion. (Round your answers to 3 decimal places.)
2. Develop a 90% confidence interval for the population proportion. (Round your answers to 3 decimal places.)

2). A population is estimated to have a standard deviation of 7. We want to estimate the population mean within 1, with a 98% level of confidence.

How large a sample is required? (Round up your answer to the next whole number.)

3). A large on-demand, video streaming company is designing a large-scale survey to determine the mean amount of time corporate executives watch on-demand television. A small pilot survey of 10 executives indicated that the mean time per week is 20 hours, with a standard deviation of 6.0 hours. The estimate of the mean viewing time should be within one-quarter hour. The 99% level of confidence is to be used.

How many executives should be surveyed? (Round the z-score to 2 decimal places and final answer to the next whole number.)

Answer 1

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