Read the case study titled "Losses to Robbery" and answer the corresponding questions:
Losses to Robbery: The Federal Bureau of Investigation conducts surveys to obtain information on the value of losses from various types of robberies. The results of the surveys are published in Population - at - Risk Rates and Selected Crime Indicators. Independent simple random samples of reports for three types of robberies - highway, gas station, and convenience store - gave the following data, in dollars, on the value of losses
|
Highway
|
Gas Station
|
Convenience Store
|
|
952
|
1298
|
844
|
|
996
|
1195
|
921
|
|
839
|
1174
|
880
|
|
1088
|
1113
|
706
|
|
1024
|
953
|
602
|
|
1280
|
614
|
- What does mean square treatment (MSTR) measure?
- What does mean square error (MSE) measure?
- Suppose that you want to perform a one - way ANOVA to compare the mean losses among the three types of robberies. What conditions are necessary? How crucial are those conditions?