Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Comparing means of three or more groups.

There are 4 auto body shops in a community and all claim to promptly serve customers. To check if there is any difference in service, customers are at random selected from each repair shop and their waiting times in days are recorded. The output from a statistical software package is:

 

Summary

Groups

Count

Sum

Average

Variance

Body Shop A

3

15.4

5.133333

0.323333

Body Shop B

4

32

8

1.433333

Body Shop C

5

25.2

5.04

0.748

Body Shop D

4

25.9

6.475

0.595833

 

ANOVA

Source of Variation

SS

df

MS

F

p-value

Between Groups

23.37321

3

7.791069

9.612506

0.001632

Within Groups

9.726167

12

0.810514

 

 

Total

33.09938

15

 

 

 

Is there proof to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920937

Have any Question? 


Related Questions in Statistics and Probability

In a certain lottery six numbers are randomly chosen from

In a certain lottery, six numbers are randomly chosen from the set   (without replacement). To win the lottery, a player must guess correctly all six numbers but it is not necessary to specify in which order the numbers ...

A study was conducted of pleas made by 10261 criminals

A study was conducted of pleas made by 1,0261 criminals. Among those criminals,953 pled guilty, and 396 of them were sentenced to prison. Among the 73 other criminals, who pled not guilty,52 were sent to prison. a. What ...

Letnbsp xknbspbe a sequence of iid exponential random

Let  X k  be a sequence of IID exponential random variables with mean of 1. We wish to  (a) Find a bound to the probability using Markov's inequality. (b) Find a bound to the probability using Chebyshev's inequality. (c) ...

The amount of time university professors devote to their

The amount of time university professors devote to their jobs per week is normally distributed with a mean of 52 hours and a standard deviation of 6 hours. 1. What is the probability that a professor selected at random w ...

Letnbspnbspbe a sequence of independent poisson counting

Let   be a sequence of independent Poisson counting processes with arrival rates, Show that the sum of all of these Poisson processes, is itself a Poisson process. What is the arrival rate of the sum process?

Suppose two events and are independenta is it true that is

Suppose two events and are independent. (a) Is it true that is independent of A ? If yes, give a convincing proof, otherwise, give a counter example. (b) Is it true that is independent ofA? If yes, give a convincing proo ...

After the civil war women were denied any real political

After the Civil War, women were denied any real political voice. And by that I mean they were still denied the right to vote. How did women express their political voice in the Gilded Age and the era in which Populism em ...

A stationary random process xt has a mean of mux and

A stationary random process, X(t), has a mean of μ X and correlation function, .  A new process is formed according to Y(t) = aX(t) + b or constants a  and Find the correlation function

Suppose a process can be considered to be in one of two

Suppose a process can be considered to be in one of two states (let's call them state A and state B), but the next state of the process depends not only on the current state but also on the previous state as well. We can ...

A raffle has a grand prize of a european cruise valued at

A raffle has a grand prize of a European cruise valued at $6500 with a second prize of a Las Vegas getaway valued at $700. If each ticket costs $3 and 8600 tickets are sold, what are the expected winnings far a ticket bu ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate