After a number of complaints about its directory assistance, a telephone company examined sam- ples of calls to determine the frequency of wrong numbers given to callers. Each sample consisted of 100 calls. Determine 95 percent limits. Is the process stable (i. e., in control)? Explain.

Explanation:

SAMPLE

1       2     3     4     5   6   7     8   9     10   11   12  13   14     15     16

Number of Errors         5     3     5     7     4   6     8     4   5     9     3   4     5       8       6     7

Average Defectives calculated by

This generates 87/ 16 (100) = 0.54.   In order to obtain control limits, we apply the formula

Implying that

= 0.54 ± 0.044, this indicates that

The upper control limit = 0.54 + 0.044 = 0.10 (following conversion into fraction forms)

The lower control limit = 0.54 – 0.044 = 0.01 (following conversion into fraction forms)

From the calculation and table above, it is ideal to conclude that the process is out of control. This is because ¾ of the values appear to be above 0.04 despite all values falling within the limits.

you can lose ranking 2 ways.

1) you don't have enough points due to you expending them by asking questions/your answers are deleted.

2) your brainliest's expired. this means that brainliests, once they exceed the 30 day limit, expires. this is to ensure that you continue to contribute into the community at a constant rank if you want to continue to have/exceed the rank you have right now.

if you go to profile, and click "show more information" located on the bottom left of the box with your information (on top of the questions answered, questions asked, and friends), you will be given the following information (example):

member since : 02/13/2017, 18: 11

questions answered: 9741

questions asked: 162

no. of brainliest answers: 1575

brainliest answers in last 30 days: 10

warnings: 0 view

questions/answers reported: 2637

questions/answers incorrectly reported: 64

look at the "brainliest answers in the last 30 days". this is the one that will affect your rank other than your points. again, once your brainliest expires (was earned 31+ days ago), it will not be counted.

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