The Following Information Was Obtained from Matched Samples Taken from Two

question 30

Multiple Choice

The following information was obtained from matched samples taken from two populations. The daily production rates for a sample of workers before and after a training program are shown below. Assume the population of differences is normally distributed. ​
Given that the null hypothesis to be tested is H₀: μd = 0,

• A) the null hypothesis should be rejected.
• B) the null hypothesis should not be rejected.
• C) the alternative hypothesis should be revised.
• D) the null hypothesis should be revised.

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