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

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.
-Refer to Exhibit 10-2. The null hypothesis to be tested is H₀: $\mu$ _d = 0. The test statistic is

A) -1.96
B) 1.96
C) 0
D) 1.645