Question

The values listed below are waiting times​ (in minutes) of customers at two different banks. At...

The values listed below are waiting times​ (in minutes) of customers at two different banks. At Bank​ A, customers enter a single waiting line that feeds three teller windows. At Bank​ B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions.

Bank A

6.4

6.6

6.7

6.8

7.1

7.3

7.6

7.9

7.9

7.9

Bank Upper BBank B

4.3

5.4

5.8

6.2

6.7

7.7

7.7

8.4

9.4

10.0

Construct a 99​% confidence interval for the population standard deviation

sigma at Bank A.

_min < σ Bank A < _min

Construct a 99​% confidence interval for the population standard deviation

sigma at Bank B.

_min < σ Bank B < _min

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The values listed below are waiting times​ (in minutes) of customers at two different banks. At...
The values listed below are waiting times​ (in minutes) of customers at two different banks. At Bank​ A, customers enter a single waiting line that feeds three teller windows. At Bank​ B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.3 6.6 6.7 6.8 7.1 7.3 7.5 7.9 7.9 7.9 Bank Upper B 4.1 5.4 5.7 6.2 6.7 7.8 7.8 8.4 9.3 10.0 Using Chi-Square critical...
The values listed below are waiting times (in minutes) of customers at two different banks. At...
The values listed below are waiting times (in minutes) of customers at two different banks. At bank A, customers enter a single waiting line that feeds three teller windows. At bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. a) Bank A: 6.5, 6.6, 6.7, 6.8, 7.1, 7.3, 7.4, 7.7, 7.7, 7.7 Construct a 95% confidence interval for the population standard deviation σ at bank A. ____...
The values listed below are waiting times​ (in minutes) of customers at two different banks. At...
The values listed below are waiting times​ (in minutes) of customers at two different banks. At Bank​ A, customers enter a single waiting line that feeds three teller windows. At Bank​ B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.46.4 6.66.6 6.76.7 6.86.8 7.17.1 7.27.2 7.57.5 7.77.7 7.77.7 7.77.7 Bank Upper BBank B 4.24.2 5.55.5 5.95.9 6.16.1 6.86.8 7.77.7 7.77.7 8.68.6 9.39.3 10.010.0 LOADING... Click...
Waiting times​ (in minutes) of customers in a bank where all customers enter a single waiting...
Waiting times​ (in minutes) of customers in a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the mean and median for each of the two​ samples, then compare the two sets of results. Single Line 6.3 6.6 6.7 6.8 7.0 7.2 7.6 7.8 7.8 7.8 Individual Lines 4.0 5.3 5.8 6.2 6.4 7.8 7.8 8.7 9.5 10.1 The mean waiting time...
Banks once had a separate customer waiting line for each teller window. Numerous banks have now...
Banks once had a separate customer waiting line for each teller window. Numerous banks have now gone to a single waiting line that feeds the teller windows as vacancies occur. For one bank a simple random sample of wait time (in minutes) using the single waiting line was taken and the results are below: 6.5 6.6 6.7 6.8 7.1 7.3 7.4 7.7 7.7 7.7 The mean wait time for multiple lines was 7.5 minutes and the known standard deviation was...
An important statistical measurement in service facilities (such as restaurants and banks) is the variability in...
An important statistical measurement in service facilities (such as restaurants and banks) is the variability in service times. As an experiment, two bank tellers were observed, and the service times for each of 100 customers were recorded. Do these data allow us to infer at the 5% significance level that the variance in service times differs between the two tellers? Estimate with 95% confidence the ratio of variances of the two bank tellers. Teller 1 Teller 2 7.2 10.9 5.4...
The waiting times​ (in minutes) of a random sample of 21 people at a bank have...
The waiting times​ (in minutes) of a random sample of 21 people at a bank have a sample standard deviation of 4.7 minutes. Construct a confidence interval for the population variance σ2 and the population standard deviation σ  Use a 99% level of confidence. Assume the sample is from a normally distributed population. What is the confidence interval for the population variance σ2​? (__,__)  ​(Round to one decimal place as​ needed.) What is the confidence interval for the population standard deviation σ​?...
1. Data show that men between the ages of 20 and 29 in a general population...
1. Data show that men between the ages of 20 and 29 in a general population have a mean height of 69.3​ inches, with a standard deviation of 2.9 inches. A baseball analyst wonders whether the standard deviation of heights of​ major-league baseball players is less than 2.9 inches. The heights​ (in inches) of 20 randomly selected players are shown in the table. 72 74 71 72 76 70 77 76 72 72 77 73 75 70 73 74 75...
The waiting times​ (in minutes) of a random sample of 22 people at a bank have...
The waiting times​ (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 4.2 minutes. Construct a confidence interval for the population variance sigma squaredσ2 and the population standard deviation sigmaσ. Use a 90% level of confidence. Assume the sample is from a normally distributed population.
The waiting times (in minutes) of a random sample of 22 people at a bank have...
The waiting times (in minutes) of a random sample of 22 people at a bank have a mean of 8.2 minutes and a standard deviation of 3.6 minutes. Assume the population has a normal distribution. a. Construct, by hand, a 99% confidence interval for the standard deviation of all wait times at this bank. b. Interpret your confidence interval in context of the data.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT