Question

7. Chapter 13, Question 2: Use the attached data file “Chapter 13 Data Set 1” to answer this question in the book. Do you agree with the author’s conclusion about whether practice time makes a difference?

<15 Hours Practice	15-25 Hours Practice	More than 25 Hours Practice
58.7	64.4	68
55.3	55.8	65.9
61.8	58.7	54.7
49.5	54.7	53.6
64.5	52.7	58.7
61	67.8	58.7
65.7	61.6	65.7
51.4	58.7	66.5
53.6	54.6	56.7
59	51.5	55.4
	54.7	51.5
	61.4	54.8
	56.9	57.2

Answer 1

For the given data using Anova: Single Factor in Excel we get output as

Anova: Single Factor
SUMMARY
Groups	Count	Sum	Average	Variance
<15 Hours Practice	10	580.5	58.05	29.87833
15-25 Hours Practice	13	753.5	57.96154	22.68423
More than 25 Hours Practice	13	767.4	59.03077	31.07897
ANOVA
Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	8.868761	2	4.43438	0.160092	0.852723	3.284918
Within Groups	914.0635	33	27.69889
Total	922.9322	35

So from the above output