A psychologist investigates the hypothesis that birth order

A psychologist investigates the hypothesis that birth order affects assertiveness. Her subjects are 20 young adults between 20 and 25 years of age. There are 7 first-born, 7 second-bom and 6 third-bom subjects. Each subject is given an assertiveness test, with the following results. High scores indicate greater assertiveness. The data are not normally distributed. What is your conclusion? First-bom Second-bom Third-bom

Solution

Sol)

Null hypothesis: Null hypothesis assumes that the samples are from identical populations.

Alternative hypothesis: Alternative hypothesis assumes that the samples come from different populations.

Test Statistics:

We use kruskall\'s wallis Test. Here we need to test the k independent samples.

From SPSS

Conclusion: From above analysis

chi square=0.695

and p value=0.707

Hence P>0.05, we accept the Null hypothesis.

Descriptive Statistics
	N	Mean	Std. Deviation	Minimum	Maximum
scores	20	14.8000	9.64965	1.00	32.00
group	20	1.9500	.82558	1.00	3.00