Question

Data #1: Do caloric recommendation labels reduce the # of calories consumed in one meal at McDonalds? Please complete all empty boxes in the tables below. x

	No handout (control) (Group A)	Handout of daily recommended caloric intake (Group B)	Handout of per-meal recommended caloric intake (Group C)
	505	1454	924
	1390	1151	520
	1908	2152	1823
	1808	926	1032
	569	2207	2399
	2078	1249	658
	965	1534	2360
	2301	1600	2147
	1564	2456	624
	1452	2320	565
	552	596	2409
Mean	1372	1604.18	1405.54
St. Dev	641.64	611.30	816.13
n
N

One-way ANOVA (please show your work!)

Source of variability	df	SS	MS	F	h2
Between-groups		346176.545
Within-groups (error)		14514521.636
Total		14860698.182
Critical F-value (obtain from F table)
Is the ANOVA significant? Y or N

Fisher’s LSD post-hoc results

Comparison	p-value	Significant? Y or N
Group A versus Group B	0.3954
Group A versus Group C	0.9157
Group B versus Group C	0.5258

Full interpretation of the results

1. Describe ANOVA results.

2. Describe post-hoc results (if applicable).

3. Describe differences between groups.

4. Interpret effect size.

Answer 1

One Way ANOVA

SOURCE	D.F	S.S	M.S	F CAL
BETWEEN GROUPS	3-1=2	346176.545	=346176.545/2= 173088.27	=173088.27/483817.39= 0.357755	=346176.545/14860698.182=0.0232
WITHIN GROUPS	30	14514521.636	=14514521.636/30= 483817.39
TOTAL	N-1=33-1=32	14860698.182
CRITICAL F VALUE	3.31583
IS ANOVA SIGNIFICANT	Since Critical value greater than Cal F therefore NOT significant

Group A versus Group B	0.3954	Not significant since P value >0.05
Group A versus Group C	0.9157	Not significant
Group B versus Group C	0.5258	Not significant

ANOVA results.: Since Fcal is SMALLER than F critical therefore FAILED TO REJECT NULL HYPOTHESIS H0.

Since all means are equal therefore post hoc analysis not applicable.

Effect Size is too small.