Question

In a study on the effect of diet on blood glucose levels, 26 subjects were assigned, at random, to one of four diets. The recorded blood glucose levels are in mmol per liter.

Diet
A	B	C	D
6.0	6.5	7.5	7.5
4.5	5.3	8.0	7.0
6.3	5.8	7.3	6.8
5.8	6.3	6.3	5.8
5.5	5.0	7.8	7.8
	6.0	8.3	6.3
	5.0	7.3
	7.0

A-How many groups? Calculate the df_{b and} df_w?

                              

B-The H₀ there are no difference in mean blood glucose levels between the four diets. The H₁ the alternative hypothesis suggested that there is a difference in mean blood glucose levels.

Tests of Between-subjects Effects
Dependent variable: Blood glucose level (mmol/litre)
Source	Type III sum of squares	Df	Mean Square	F	Sig
Diet	16.186	3	5.395	12.339	.000
Error	9.620	22	0.437
Corrected total	25.807	25

a.R Squared=0.627 (Adjusted R squared=.576)

1-What this statistics outcome is suggesting?

2- Write the statistical statement about ANOVA

Answer 1