Suppose you have a sample of 400 people. You asked each of the 400 people whether they like or dislike a particular product. 320 people said that they like the product. a) What is a 95% confidence interval for the population proportion! W b) Test the claim that the proportion is below 90%. You may use the fact that the p-value is 0.00042

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Part B
Suppose you have a sample of 400 people. You asked each of the 400 people whether they like or dislike a
particular product. 320 people said that they like the product.
a) What is a 95% confidence interval for the population proportion!
2
b) Test the claim that the proportion is below 90%. You may use the fact that the p-value is 0.00042.
Transcribed Image Text:Part B Suppose you have a sample of 400 people. You asked each of the 400 people whether they like or dislike a particular product. 320 people said that they like the product. a) What is a 95% confidence interval for the population proportion! 2 b) Test the claim that the proportion is below 90%. You may use the fact that the p-value is 0.00042.
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