market research organization takes a simple random sample of 200 households in a town with 25,000 households. Of the 200 sampled households, 120 report having a video on-demand service like Netflix, Amazon Video, or Hulu. (a) To answer parts (b) and (c), you need a box model. The box representing the population has a standard deviation that is (circle one) known OR estimated to be (fill in the value) ____. (b) The percentage of households in the town with a video on-demand service is estimated as ___%, and this estimate is likely to be off by about ___%. (c) A 90%-confidence interval for the percentage of households in the town with a video on- demand service goes from ___% to ___%. (d) Explain in one sentence why it's ok to use the normal table in calculating part (c).
A market research organization takes a simple random sample of 200 households in a town with 25,000 households. Of the 200 sampled households, 120 report having a video on-demand service like Netflix, Amazon Video, or Hulu.
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(a) To answer parts (b) and (c), you need a box model. The box representing the population has a standard deviation that is
(circle one) known OR estimated to be (fill in the value) ____.
-
(b) The percentage of households in the town with a video on-demand service is estimated as ___%, and this estimate is likely to be off by about ___%.
-
(c) A 90%-confidence interval for the percentage of households in the town with a video on- demand service goes from ___% to ___%.
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(d) Explain in one sentence why it's ok to use the normal table in calculating part (c).
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