Question

Scenario A: An experimental study examined whether method of daily announcement affects worker productivity. A factory with two facilities with similar worker productivity percentages participated in the study. One facility delivered daily announcements using a speaker system whereas the other facility displayed announcements all day on a screen located in the break room. Worker productivity percentages were compared between the two facilities. Use this scenario to answer the following question.
9)	What is the independent variable?	Answer:
10)	What is the dependent variable?	Answer:
11)	What is the null hypothesis?	Answer:
12)	What is the alternative/research hypothesis?	Answer:
13)	If they reported t (25) = 1.95 and it is two-tailed, using the critical value table in your e-book, what is tcv?	Answer:
14)	What should the researcher conclude about the null hypothesis? (Reject / fail to reject?)	Answer:

Answer 1

Question 9

The independent variable for the given scenario is given as method of daily announcement.

Question 10

The dependent variable for the given scenario is given as the worker productivity.

Question 11

Null hypothesis: H₀: The method of daily announcement does not affect worker productivity.

Question 12

Alternative/Research hypothesis: H_a: The method of daily announcement affect worker productivity.

Question 13

We are given

Test statistic = t = 1.95

df = 25

Test is two tailed.

We assume level of significance = α = 0.05

So critical value by using t-table is given as below:

Critical value = t_cv = - 2.0595 and 2.0595

Question 14

Test statistic value 1.95 is lies between critical values - 2.0595 and 2.0595, so we fail to reject the null hypothesis.

There is not sufficient evidence to conclude that the method of daily announcement affect worker productivity.