Question: 1. The following table provides data for 20 samples each of size 4. Sample x 1 x 2 x 3 x 4 2 50 48
1.The following table provides data for 20 samples each of size 4.
Sample
x1
x2
x3
x4
2
50
48
51
43
3
32
28
26
22
4
52
55
56
44
5
16
16
21
26
6
36
36
35
31
7
21
22
18
21
8
29
21
23
22
9
26
46
44
14
10
24
22
22
44
11
18
24
24
49
12
24
20
26
23
13
19
21
27
28
14
8
11
12
12
15
24
18
27
28
16
56
52
56
50
17
32
22
18
25
18
8
12
11
17
19
51
54
52
49
20
30
28
35
22
a)Using all the data, find control limits for and R charts, construct the control chart, and plot the data. (10 pts)
b)Does this process appear in statistical control? Briefly explain why or why not. (5 pts)
c)Identify out-of-control points. If necessary, recompute the control limits after removing the outliers. What do you conclude? (10 pts)
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