Score: 0 of 1 pt 14 of 18 (12 completo) HW Score: 40.27%, 7 25 of 18 pts 13.1.47 Question Help Police recorded the average speed of cars driving on a busy street by a school. For a sample of 25 speeds, it was determined that the average amount over the spood limit for the 25 speeds was 113 mph with a standard deviation of 8 mph. The 90% confidence interval estimate for this sample is 8.56 mph to 14:04 mph a) What is the margin of error for this problem? b) What sie sample is needed to reduce the margin of error to no more than 1? a) The margin of error in mph Score: 0 of 1 pt 15 of 18 (12 complete HW Score: 40.27%, 7 25 of 18 pts 13.1.49-T Question Help Some accounting firms give the client an option to pay a fee when the tax return is completed that guarantees tax advices and support from the accountant if the client were audited. A large accounting firm is trying to determine what fee to charge for next year's retums. In previous years, the actual mean cost to the firm for attending a client audition was $630 To determine if the cost has changed the firm randomly samples 37 client audit feet. The sample mean audit cost was 5050 with a standard deviation of $75. Complete parts a through below a) Develop a 99% confidence trvalentiate for the mean audit com The 99% confidence interval for the mean mucit costla ( (Round to the nearest dollar as needed) Score: 0 of 1 pt 14 of 18 (12 completo) HW Score: 40.27%, 7 25 of 18 pts 13.1.47 Question Help Police recorded the average speed of cars driving on a busy street by a school. For a sample of 25 speeds, it was determined that the average amount over the spood limit for the 25 speeds was 113 mph with a standard deviation of 8 mph. The 90% confidence interval estimate for this sample is 8.56 mph to 14:04 mph a) What is the margin of error for this problem? b) What sie sample is needed to reduce the margin of error to no more than 1? a) The margin of error in mph Score: 0 of 1 pt 15 of 18 (12 complete HW Score: 40.27%, 7 25 of 18 pts 13.1.49-T Question Help Some accounting firms give the client an option to pay a fee when the tax return is completed that guarantees tax advices and support from the accountant if the client were audited. A large accounting firm is trying to determine what fee to charge for next year's retums. In previous years, the actual mean cost to the firm for attending a client audition was $630 To determine if the cost has changed the firm randomly samples 37 client audit feet. The sample mean audit cost was 5050 with a standard deviation of $75. Complete parts a through below a) Develop a 99% confidence trvalentiate for the mean audit com The 99% confidence interval for the mean mucit costla ( (Round to the nearest dollar as needed)
