The mean amount of money spent per week on gas by a sample of 25 drivers...
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
Homework Answers
Add Answer to:
The mean amount of money spent per week on gas by a sample of 25
drivers...
The mean amount of money spent on lunch per week for a sample of 75 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 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 95 students is $19. Ifthe margin of error for the population mean with a 95 % confidence interval is 1 0, construct a 95 % confidence interval for the mean amount of money spent on lunch per week for all students Answer How to Enter) 2 Points m Tables Keypad Lowee endpoint Upper endpoint
1. A random sample of 82 customers, who visited a department store, spent an average of...
1. A random sample of 82 customers, who visited a department store, spent an average of $71 at this store. Suppose the standard deviation of expenditures at this store is O = $19. What is the e 98% confidence interval for the population mean? 2. A sample of 25 elements produced a mean of 123.4 and a standard deviation of 18.32 Assuming that the population has a normal distribution, what is the 90% confidence interval for the population mean? 3....
3. A research firm found that the amount of money smokers spent on cigarettes follows a...
3. A research firm found that the amount of money smokers spent on cigarettes follows a normal distribution. The population standard deviation is $5. The research firm took a sample of 49 smokers and found that the sample mean is S20 Develop the 98% confidence interval for the population mean. IIO points] 6. A study of attendance at University of Alabama's basketball games revealed that the distribution of games is normally distributed with a mean of 10,000 and a standard...
3. In a recent study of 100 eighth graders, the mean number of hours per week...
3. In a recent study of 100 eighth graders, the mean number of hours per week that they watched television was 22.6. Assume the population standard deviation, o, is 5.2 hours. (Section 6.1) Construct a 90% confidence interval for the population mean number of hours that eighth graders watch television • Margin of error, E..8554 Confidence interval:al: 74<us 23.46 If the population standard deviation was reduced by 50% to 2.6 and the level of confidence remained at 90%, what would...
1. To determine the average number of hours spent studying by college students per week, a...
1. To determine the average number of hours spent studying by college students per week, a sample of 39 students was randomly selected, and found to spend an average of 17.1 hours per week, with a standard deviation of 4.3 hours. Find the 90% confidence interval for the mean number of hours spent studying per week by all college students. What is the upper and lower bound? 2. If I asked a random student how many hours they study per...
A random sample of 40 adults aged 25 to 34 years spent an average of $216...
A random sample of 40 adults aged 25 to 34 years spent an average of $216 annually on movies The sample standard deviation is $60. a) Develop a 95% confidence interval for the average annual amount spent on movies. b) Verbally interpret the meaning of the confidence interval that you found for part a c) If the desired margin of error for the above confidence interval is $10, what size sample is necessary? using the sample standard deviation given above...
The owner of a coffee shop has found that the average amount spent by a sample of 25 customers is $8.60 with a sample s...
The owner of a coffee shop has found that the average amount spent by a sample of 25 customers is $8.60 with a sample standard deviation of $1.4. What are the lower and upper bounds of a 90% confidence interval for the population mean amount spent (in dollars) by customers? (6.32, 7.28) (6.34, 7.26) (8.12, 9.08) (9.50, 9.70)
in a random sample of 8 people, the mean commute time to work was 36.5 minutes...
in a random sample of 8 people, the mean commute time to work was 36.5 minutes and the standard deviation was 7.4 minutes. A 90% confidence interval using the t-distribution was calculated to be (31.5,41.5). After researching commute times to work, it was found that the population standard deviation is 9.3 minutes. find the margin of error and construct a 90% confidence interval using normal distribution with the appropriate calculations for a standard deviation that is known. compare the results....
In a random sample of 8 people, the mean commute time to work was 34.5 minutes...
In a random sample of 8 people, the mean commute time to work was 34.5 minutes and the standard deviation was 7.4 minutes. A 90% confidence interval using the t-distribution was calculated to be left parenthesis 29.5 comma 39.5 right parenthesis(29.5,39.5). After researching commute times to work, it was found that the population standard deviation is 9.3minutes. Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard...
The mean amount of money spent on lunch per week for a sample of 95 students is $19. Ifthe margin of error for the population mean with a 95 % confidence interval is 1 0, construct a 95 % confidence interval for the mean amount of money spent on lunch per week for all students Answer How to Enter) 2 Points m Tables Keypad Lowee endpoint Upper endpoint
1. A random sample of 82 customers, who visited a department store, spent an average of $71 at this store. Suppose the standard deviation of expenditures at this store is O = $19. What is the e 98% confidence interval for the population mean? 2. A sample of 25 elements produced a mean of 123.4 and a standard deviation of 18.32 Assuming that the population has a normal distribution, what is the 90% confidence interval for the population mean? 3....
3. A research firm found that the amount of money smokers spent on cigarettes follows a normal distribution. The population standard deviation is $5. The research firm took a sample of 49 smokers and found that the sample mean is S20 Develop the 98% confidence interval for the population mean. IIO points] 6. A study of attendance at University of Alabama's basketball games revealed that the distribution of games is normally distributed with a mean of 10,000 and a standard...
3. In a recent study of 100 eighth graders, the mean number of hours per week that they watched television was 22.6. Assume the population standard deviation, o, is 5.2 hours. (Section 6.1) Construct a 90% confidence interval for the population mean number of hours that eighth graders watch television • Margin of error, E..8554 Confidence interval:al: 74<us 23.46 If the population standard deviation was reduced by 50% to 2.6 and the level of confidence remained at 90%, what would...
Most questions answered within 3 hours.
-
SQL help:
Design a database diagram for a database that stores information
about the Downloads that...
asked 16 minutes ago -
In 1970s and 1980s, molecular biologists discovered that the
hormone testosterone, binds a receptor protein that...
asked 2 hours ago -
january 1 2010 road catering service purchase a piece of
equipment for 58000 which is expected...
asked 2 hours ago -
Explain Mertons concept of anomie is and what the
modes of adaptation to it are?
asked 3 hours ago -
Jamie is doing a survey at her school about whether the students
feel the cafeteria food...
asked 5 hours ago -
How many liters of 0.669 M KOH will be needed to raise the pH of
0.339...
asked 7 hours ago -
A liquid of density 1270 kg/m 3 flows steadily through a pipe of
varying diameter and...
asked 7 hours ago -
Questions: What should the American executive do?
'A visiting American executive finds that a foreign subsidiary...
asked 7 hours ago -
Activity based costing was introduced as an alternative to
absorption costing.
1. Discuss using illustration the...
asked 7 hours ago -
1. You own shares of Crane DVD Company and are interested in
selling them. With so...
asked 7 hours ago -
How many grams of He are necessary to fill a balloon having a
volume of 4.5E3...
asked 7 hours ago -
The 2 patients, still in the hospital, were interviewed by a
MoH epidemiologist. The interviews revealed...
asked 7 hours ago