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Shtirlitz [24]
2 years ago
6

A television network wanted to estimate the proportion of a one-hour time slot that is made up of commercials. The network took

random samples of
10
10 one-hour time slots. The following are the sample proportions the network found in
12
12 samples.

​

Part A

​

​What is the estimated proportion of commercials in all one-hour time slots? Round your answer to the nearest thousandth.
Mathematics
1 answer:
polet [3.4K]2 years ago
5 0

Answer:

120

Step-by-step explanation:

Remember, always round sample size up, regardless of the decimal part. Answer: To find a 95% CI with a margin of error no more than ±3.5 percentage points, where the true population proportion is around 42%, you must survey at least 764 people. 10×764 = 7640; presumably the electorate is larger than that. So, then 10 × 12 = 120

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