Homework Help is Here – Start Your Trial Now!
Math
Statistics
Your answer is partially correct. Try again. The customers at a bank complained about long lines and the time they had to spend waiting for service. It is known that the customers at this bank had to wait 9 minutes, on average, before being served. The management made some changes to reduce the waiting time for its customers. A sample of 59 customers taken after these changes were made produced a mean waiting time of 8.1 minutes with a standard deviation of 2.5 minutes. Using this sample mean, the bank manager displayed a huge banner inside the bank mentioning that the mean waiting time for customers has been reduced by new changes. Do you think the bank manager's claim is justifiable? Use a 2.5% significance level to answer this question. Use both approaches. Use the p-value approach. Use the t distribution table to find a range for the p-value. Enter the exact values for the range. 0.8895 0.8895 < p-value Use the critical-value approach. Round your answers to three decimal places. -2.765 Observed value 0.8895 Critical value = true Conclusion: The manager's claim is

Your answer is partially correct. Try again. The customers at a bank complained about long lines and the time they had to spend waiting for service. It is known that the customers at this bank had to wait 9 minutes, on average, before being served. The management made some changes to reduce the waiting time for its customers. A sample of 59 customers taken after these changes were made produced a mean waiting time of 8.1 minutes with a standard deviation of 2.5 minutes. Using this sample mean, the bank manager displayed a huge banner inside the bank mentioning that the mean waiting time for customers has been reduced by new changes. Do you think the bank manager's claim is justifiable? Use a 2.5% significance level to answer this question. Use both approaches. Use the p-value approach. Use the t distribution table to find a range for the p-value. Enter the exact values for the range. 0.8895 0.8895 < p-value Use the critical-value approach. Round your answers to three decimal places. -2.765 Observed value 0.8895 Critical value = true Conclusion: The manager's claim is

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
See similar textbooks
icon
Related questions
Topic Video
Question

can i have the answers marked in red

Your answer is partially correct. Try again. The customers at a bank complained about long lines and the time they had to spend waiting for service. It is known that the customers at this bank had to wait 9 minutes, on average, before being served. The management made some changes to reduce the waiting time for its customers. A sample of 59 customers taken after these changes were made produced a mean waiting time of 8.1 minutes with a standard deviation of 2.5 minutes. Using this sample mean, the bank manager displayed a huge banner inside the bank mentioning that the mean waiting time for customers has been reduced by new changes. Do you think the bank manager's claim is justifiable? Use a 2.5% significance level to answer this question. Use both approaches. Use the p-value approach. Use the t distribution table to find a range for the p-value. Enter the exact values for the range. 0.8895 0.8895 < p-value Use the critical-value approach. Round your answers to three decimal places. -2.765 Observed value 0.8895 Critical value = true Conclusion: The manager's claim is
Transcribed Image Text:Your answer is partially correct. Try again. The customers at a bank complained about long lines and the time they had to spend waiting for service. It is known that the customers at this bank had to wait 9 minutes, on average, before being served. The management made some changes to reduce the waiting time for its customers. A sample of 59 customers taken after these changes were made produced a mean waiting time of 8.1 minutes with a standard deviation of 2.5 minutes. Using this sample mean, the bank manager displayed a huge banner inside the bank mentioning that the mean waiting time for customers has been reduced by new changes. Do you think the bank manager's claim is justifiable? Use a 2.5% significance level to answer this question. Use both approaches. Use the p-value approach. Use the t distribution table to find a range for the p-value. Enter the exact values for the range. 0.8895 0.8895 < p-value Use the critical-value approach. Round your answers to three decimal places. -2.765 Observed value 0.8895 Critical value = true Conclusion: The manager's claim is
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Discrete Probability Distributions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
SEE MORE TEXTBOOKS