Question

Based on the APA formatted statements below, give the type of research design (between subjects/within subjects), the sample size, and the decision (reject the null hypothesis/fail to reject the null hypothesis) in this study? NOTE: I need the three pieces of information with steps.

A researcher develops an advertisement aimed at increasing how much the public trusts a particular federal agency. She asks participants to rate their level of trust for the organization before and after viewing an advertisement. Higher ratings indicate greater trust.

Participants rated the federal agency as significantly more trustworthy (M_D = 4 points) after viewing the advertisement, t(119), = 4.021, p < .05, r² = 0.22.  

Answer 1