Question

Number of days	Probabilities
1	0.2488
2	0.1076
3	0.091
4	0.123
5	0.1336
6	0.1142
7	0.0701
8	0.0455
9	0.0195
10	0.0133
11	0.0105
12	0.008
13	0.0055
14	0.0039
15	0.0024
16	0.0017
17	0.0009
18	0.0005

A company manufactures eyeglasses for different retailers. The number of days it takes to fix defects in an eyeglass and the probability that it will take that number of days are in the table.

Find the mean number of days to fix defects. Round to the nearest tenth.

Find the variance for the number of days to fix defects. Round to the nearest tenth.

Find the standard deviation for the number of days to fix defects. Round to the nearest tenth.

Find probability that a lens will take at exactly 12 days to make a fix the defect.

2) A company manufactures eyeglasses for different retailers. The number of days it takes to fix defects in an eyeglass and the probability that it will take that number of days are in the table.

Number of days	Probabilities
1	0.2488
2	0.1082
3	0.0912
4	0.1228
5	0.1327
6	0.1144
7	0.0695
8	0.0458
9	0.0187
10	0.0129
11	0.0103
12	0.0082
13	0.0061
14	0.0045
15	0.0018
16	0.0025
17	0.0008
18	0.0008

Find the mean number of days to fix defects. Round to the nearest tenth.

Find the variance for the number of days to fix defects. Round to the nearest tenth.

Find the standard deviation for the number of days to fix defects. Round to the nearest tenth.

Find probability that a lens will take at exactly 2 days to make a fix the defect.

Answer 1

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