Problem 1

10.62 For a simple random sample, n = 700 and p = 0.63. At the 0.025 level, test H0:pi 0.60 versus H1:pi> 0.60 by answering the following questions:

Please round your answer to 2 decimal places

a. The test statistic is.

b. The critical value is.

Problem 2

10.60 For a simple random sample, n = 200 p = 0.34. At the 0.01 level, test H0: pi= 0.40 versus H1:pi 0.40 by answering the following questions:

Please round your answer to 2 decimal places

a. The test statistic is.

b. The critical values are +/-

Problem 3

7.26 The Canada Urban Transit Association has reported that the average revenue per passenger trip during a given year was $1.55. Assuming a normal distribution and a standard deviation of= $0.20.

Please round your answers to 4 decimal places.

a. The probability that a randomly selected passenger trip produced between $1.55 and $1.80 of revenue is

b. The probability that a randomly selected passenger trip produced over $1.90 of revenue is

c. The probability that a randomly selected passenger trip produced under $1.25 of revenue

Problem 4

7.28 In 2009, the average charge for tax preparation by H&R Block, Inc. was $187. Assuming a normal distribution and a standard deviation of= $20.

Please round your answers to 4 decimal places.

a. The probability that a randomly selected tax preparation customer would have paid a fee between $150 and $180 is.

b. The probability that a randomly selected tax preparation customer would have paid a fee under $140 is.

c. The probability that a randomly selected tax preparation customer would have paid a fee over $220 is.