Problem 9-47 [LO 9-7] You are the auditor of Jexel, an auto air-conditioner service and repair company, and you have decided to use the mean-per-unit method to test the existence and gross valuation of recorded accounts receivable. The client's records include 11,000 accounts with a total book value of $1,300,000. You decide to use tolerable misstatement of $172,000, an incorrect acceptance risk of 15 percent, and an incorrect rejection risk of 10.0 percent. Using Excel, you estimated the standard deviation of the population as $25. Use Figure 9-8 to obtain the incorrect acceptance and rejection coefficients. Required: a. Determine the sample size. b. Assume you tested the sample and got the following results: The mean audited value of the accounts sampled was $118. Assuming that the standard deviation of the sample's audited value is also $25, what is the projected misstatement for the population? c. Assuming that the standard deviation of the sample's audited value is $20, what is the projected misstatement for the population? Required a Required B Required C Determine the sample size. (Roundup to the next whole number.) Sample size Problem 9-47 [LO 9-7] You are the auditor of Jexel, an auto air-conditioner service and repair company, and you have decided to use the mean-per-unit method to test the existence and gross valuation of recorded accounts receivable. The client's records include 11,000 accounts with a total book value of $1,300,000. You decide to use tolerable misstatement of $172,000, an incorrect acceptance risk of 15 percent, and an incorrect rejection risk of 10.0 percent. Using Excel, you estimated the standard deviation of the population as $25. Use Figure 9-8 to obtain the incorrect acceptance and rejection coefficients. Required: a. Determine the sample size. b. Assume you tested the sample and got the following results. The mean audited value of the accounts sampled was $118. Assuming that the standard deviation of the sample's audited value is also $25, what is the projected misstatement for the population? c. Assuming that the standard deviation of the sample's audited value is $20, what is the projected misstatement for the population? Required A Required B Required C Assume you tested the sample and got the following results: The mean audited value of the accounts sampled was $122. Assuming that the standard deviation of the sample's audited value is also $25, what is the projected misstatement for the population? What is the confidence interval? Is the account materially misstated? Projected miststatement Confidence Interval Materially misstated? Will you accept the account? Problem 9-47 [LO 9-7] You are the auditor of Jexel, an auto air-conditioner service and repair company, and you have decided to use the mean-per-unit method to test the existence and gross valuation of recorded accounts receivable. The client's records include 11,000 accounts with a total book value of $1,300,000. You decide to use tolerable misstatement of $172,000, an incorrect acceptance risk of 15 percent, and an incorrect rejection risk of 10.0 percent. Using Excel, you estimated the standard deviation of the population as $25. Use Figure 9-8 to obtain the incorrect acceptance and rejection coefficients. Required: a. Determine the sample size. b. Assume you tested the sample and got the following results. The mean audited value of the accounts sampled was $118. Assuming that the standard deviation of the sample's audited value is also $25, what is the projected misstatement for the population? c. Assuming that the standard deviation of the sample's audited value is $20, what is the projected misstatement for the population? Required A Required B Required a Assuming that the standard deviation of the sample's audited value is $20, what is the projected misstatement for the population? Projected miststatement Confidence interval Materially misstated? Will you accept the account?
