Researchers want to investigate the effect of media depictio

Researchers want to investigate the effect of media depiction of female beauty on teenage girls aged 15-19 by comparing self-image after viewing photographs of

Solution

A.This is a between subjects design.

B.The null hypothesis is: here is no significant difference between the two population means.

The alternative hypothesis is: there is a significant difference between the two population means.

C.The degrees of freedom is df=34+37-2=69

The pooled variance is: ((34-1)*5.5^2+(37-1)*5.4^2)/69=29.68

The estimated standard error is root over(29.68/34+29.68/37)=1.29

The test statistic is:((18.7-18.0)-0)/1.29=0.54

The critical value is: 2.000

Since, the test statistic does not fall in the critical thus fail to reject the null hypothesis. So, the test is not significant at 0.05 level of significance.