An experimental study examined whether method of daily announcement affect worker productivity. A factory with two facilities with similar worker productivity percentages participated in the study. One facility delievered daily announcements using a speaker system whereas the other facility displayed announcements all day on a screen located in the back room. Worker productivity percentages were compared between the two facilities.

what is the null hypothesis?

what is the alternative/research hypothesis?

if they reported t (120)= 2.0 and it is two-tailed, using the critical value table in your e-book, what is tcv?

what should the researcher conclude about the null hypothesis? (Reject/fail to reject?)