Webster library wants to know how many green books it has., Ask an Expert

Programming

1. Webster Library wants to know how many green books it has. Out of the 500 shelves of books, 3 shelves were selected. These shelves hold 150 books each. 54 of the books sampled were green.

a. What percentage of the books is green?

b. What is the 90% confidence interval for the percentage of green books

c. How many books need to be sampled to be within 4% with 95% confidence?

2. 35 books were sampled at the bookstore. They had an average price of $160 with a standard deviation of $43.

a. What is the 95% confidence interval for the average price of a book?

b. How may books need to be checked to be 90% confident that the average price was within $10?

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DBMS, Programming

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Reference No.:- M9458446

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