The mean amount of money spent on lunch per week for a sample of 95 students...
The mean amount of money spent on lunch per week for a sample of 75 students is $42. If the margin of error for the population mean with a 99% confidence interval is 2.10, construct a 99% confidence interval for the mean amount of money spent on lunch per week for all students.
The mean number of hours of study time per week for a sample of 524 high-school students is 27. If the margin of error for the population mean with a 98% confidence interval is 1.7, construct a 98% confidence interval for the mean number of hours of study time per week for all high-school students. Lower endpoint? upper endpoint?
The mean amount of money spent per week on gas by a sample of 25 drivers was found to be $57.00 with a standard deviation of $2.36. Calculate the margin of error for a 90% confidence interval. *Assume that the population is approximately normal. Possible Answers: A: $0.81 B: $0.71 C: $1.19 D: $1.23
The mean number of hours of study time per week for a sample of 559 students is 23. If the margin of error for the population mean with a 99% confidence interval is 1.7, construct a 99% confidence interval for the mean number of hours of study time per week for all students
The table below contains the amount that a sample of nine customers spent for lunch ($) at a fast-food restaurant. Complete parts a and b below. 4.32 5.06 5.69 6.44 7.18 7.78 8.41 8.67 9.67 a. Construct a 95% confidence interval estimate for the population mean amount spent for lunch at a fast-food restaurant, assuming a normal distribution.The % confidence interval estimate is from $ to $ b. Interpret the interval constructed in (a)
The amount that a sample of eight customers spent for lunch ($) at a fast-food restaurant is shown below: 67, 52, 86, 52, 88, 32, 28, 43 a. Find the sample mean ??? b. Find the sample standard deviation S c. Construct a 95% confidence interval estimate for the population mean ?
Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based upon past studies the population standard deviation is known with ơ $5. Click on the datafile logo to reference the data. DATA file Round your answers to two decimal places. Use the critical value with three decimal places. a. At 99% confidence, what is the margin of error? . Develop a 99% confidence...
A marketing research company desires to know the mean consumption of milk per week among males over age 25. A sample of 4145 males over age 25 was drawn and the mean milk consumption was 5.1 liters. Assume that the population standard deviation is known to be 1.4 liters. Construct the 99 % confidence interval for the mean consumption of milk among males over age 25. Round your answers to one decimal place. Answer (How to Enter) 2 Points Keypad...
The mean number of hours of part-time work per week for a sample of 526 college students is 28. if the margin of error for the population mean with a 99 % confidence interval is 2.2, construct a 99 % confidence interval for the mean number of hours of part-time work per week for all college students.
The following data are the amounts that a sample of 15 customers spent for lunch ($) at a fast-food restaurant. Complete parts (a) through (d) below. a. Construct a 95% confidence interval estimate for the population mean amount spent for lunch ($) at a fast-food restaurant. b. Interpret the interval constructed in (a). c. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)? d. Do you think that the assumption...