Exhibit 10-2
The following information was obtained from matched samples.
The daily production rates for a sample of workers before and after a training program are shown below.
$$\begin{array} { c c c }
\text { Worker } & \text { Before } & \text { After } \
1 & 20 & 22 \
2 & 25 & 23 \
3 & 27 & 27 \
4 & 23 & 20 \
5 & 22 & 25 \
6 & 20 & 19 \
7 & 17 & 18
\end{array}$$
-Refer to Exhibit 10-2. The null hypothesis to be tested is H0: ?d = 0. The test statistic is
A) -1.96
B) 1.96
C) 0
D) 1.645

Question

Exhibit 10-2
The following information was obtained from matched samples.
The daily production rates for a sample of workers before and after a training program are shown below.
 $$\begin{array} { c c c } 
\text { Worker } & \text { Before } & \text { After } \
1 & 20 & 22 \
2 & 25 & 23 \
3 & 27 & 27 \
4 & 23 & 20 \
5 & 22 & 25 \
6 & 20 & 19 \
7 & 17 & 18
\end{array}$$
-Refer to Exhibit 10-2. The null hypothesis to be tested is H0: ?d = 0. The test statistic is
A) -1.96
B) 1.96
C) 0
D) 1.645

Quizplus · Accepted Answer

The null hypothesis H0: ?d = 0 implies that the mean difference in production rates before and after the training program is zero. The test statistic is calculated based on the differences, and in this case, it is 0, indicating no significant difference.

Exhibit 10-2 the Following Information Was Obtained from Matched Samples

Exhibit 10-2
the Following Information Was Obtained from Matched Samples