Question

For the dataset Production Count.xlsx.   Is there evidence at a 5% significance level that the mean production count for factory workers is greater after attending a seminar than before? Highlight the P-value and interpret your result.

Worker	Before Count	After Count
1	20	22
2	25	28
3	27	27
4	23	26
5	22	25
6	20	19
7	17	18
8	27	29
9	20	22
10	26	24
11	26	23
12	20	31
13	18	24
14	23	19
15	17	21
16	23	35
17	20	28
18	23	29
19	18	20

Answer 1

This Problem is solved by using Minitab Software .

Step 1 : Data Entering

Step 2 : Paired t- test

Minitab Path : stat >> Basic statistics >>paired t test

Output is

Answer :

D = After count - Before count

H0 :

Ha :

P-value = 0.004

Decision Rule : If P-value less than 0.05 ,Reject H0

Interpretation : Reject H0 , that mean there is statistically significant difference .Therefore the mean production count for factory workers is greater after attending a seminar than before.

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