with 95% confidence, you can conc eoand McDonald\'s and betw service time for We
ID: 3361823 • Letter: W
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with 95% confidence, you can conc eoand McDonald's and betw service time for Wendy's and for Taco Bell is faster than -A. In addition, the service time is faster for wco that the and Chick-fil-A. Also, the population mean drive-throu slower than for McDonald's and for Chick-Fil-A for Wendy's than for Taco B blems for Section LEARNING THE BASICSon 11 11.1 An seven values in each grou experiment has a single factor with five many degrees of freedom are there in determining theamong-group van many degrees of freedom are there in determining the 114 Consider an e p. groups and es in each a. How many degre among-group variation? within-group variation? tal variation? 2 You are working with the same experiment as in Problem 11.1. in each. For the .How many deg b. within-group va .How many deg 11.5 Consider a rees of freedom are there in determining the to- tal variation? If SSA 60 and SST 210, what is SSW? ing results a. b. What is MSA? c. What is MSW? d. What is the value of FSTAT? 11.3 You are working with the same experiment as in Problems Source a. Construct the ANOVA summary table and fl linall values inAndme b. At the 0.05 level of significance, what is the upper-tail critical Within c. State the decision rule for testing the null hypothesis that all Tota Among 11.1 and 11.2. groups the table. value from the F distribution? five groups have equal population means group d. What is your statistical decision?Explanation / Answer
Solution- 11.1-
There are five groups and 7 values in each group, then
(a) There are 5 samples involved with one data value for each sample (the sample mean), so there are 5-1 = 4 degrees of freedom.
(b) Since each sample has degrees of freedom equal to one less than their sample sizes, and there are 5 samples, the total degrees of freedom is 5 less than the total sample size ( 7*5 = 35)
So, df = 35 - 5
= 30
(c) Total degree of freedom = 30 +4
= 34
Answers
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