Question

Call centers typically have high turnover. The director of human resources for a large bank has compiled data on about 70 former employees at one of the bank�s call centers in the Excel file Call Center Data . In writing an article about call center working conditions, a reporter has claimed that the average tenure is no more than two years. Formulate and test a hypothesis using these data to determine if this claim can be disputed.

Call Center Data | ||||

Male = 1 Female = 0 |
Yes = 1 No = 0 |
Yes = 1 No = 0 |
||

Gender | Starting Age | Prior Call Center Experience | College Degree | Length of Service (years) |

0 | 18 | 0 | 0 | 7.02 |

1 | 18 | 1 | 0 | 3.47 |

0 | 19 | 0 | 0 | 2.07 |

0 | 19 | 0 | 0 | 1.78 |

0 | 19 | 0 | 0 | 4.42 |

0 | 19 | 0 | 0 | 3.29 |

0 | 19 | 1 | 0 | 3.05 |

1 | 19 | 1 | 0 | 0.49 |

1 | 19 | 1 | 0 | 0.61 |

1 | 19 | 0 | 0 | 3.12 |

0 | 20 | 0 | 0 | 2.95 |

0 | 20 | 1 | 0 | 2.15 |

0 | 20 | 0 | 0 | 4.03 |

1 | 20 | 0 | 0 | 3.53 |

1 | 20 | 0 | 0 | 2.47 |

0 | 21 | 0 | 0 | 2.15 |

1 | 21 | 0 | 0 | 3.27 |

1 | 21 | 0 | 0 | 1.10 |

1 | 21 | 0 | 0 | 1.78 |

0 | 22 | 0 | 0 | 1.94 |

0 | 22 | 1 | 0 | 2.91 |

0 | 23 | 1 | 0 | 3.02 |

0 | 23 | 1 | 0 | 2.53 |

0 | 23 | 0 | 1 | 1.84 |

1 | 23 | 1 | 0 | 2.88 |

1 | 23 | 0 | 0 | 2.20 |

1 | 23 | 0 | 1 | 1.44 |

1 | 24 | 0 | 0 | 2.53 |

1 | 24 | 0 | 1 | 1.41 |

1 | 24 | 0 | 1 | 1.08 |

0 | 25 | 1 | 1 | 0.98 |

1 | 25 | 1 | 0 | 0.63 |

1 | 25 | 0 | 1 | 1.30 |

1 | 25 | 1 | 1 | 2.13 |

0 | 26 | 1 | 0 | 2.30 |

0 | 26 | 1 | 1 | 2.05 |

0 | 26 | 1 | 1 | 2.13 |

1 | 26 | 1 | 1 | 2.12 |

1 | 26 | 0 | 1 | 2.16 |

1 | 27 | 0 | 0 | 2.04 |

0 | 28 | 0 | 0 | 1.70 |

0 | 28 | 0 | 1 | 2.11 |

1 | 29 | 0 | 1 | 1.75 |

0 | 30 | 0 | 1 | 2.15 |

1 | 30 | 1 | 0 | 2.12 |

1 | 30 | 0 | 1 | 0.37 |

0 | 31 | 0 | 0 | 1.95 |

0 | 31 | 0 | 0 | 1.02 |

0 | 31 | 0 | 1 | 1.26 |

1 | 31 | 0 | 0 | 1.04 |

0 | 32 | 0 | 1 | 1.64 |

1 | 32 | 1 | 0 | 1.75 |

1 | 32 | 1 | 1 | 1.71 |

1 | 33 | 0 | 0 | 1.29 |

0 | 34 | 1 | 0 | 1.48 |

0 | 34 | 0 | 1 | 1.31 |

1 | 34 | 0 | 0 | 1.46 |

1 | 34 | 1 | 0 | 1.88 |

1 | 36 | 0 | 1 | 1.16 |

0 | 39 | 0 | 0 | 1.16 |

0 | 39 | 0 | 1 | 1.05 |

1 | 39 | 0 | 0 | 0.96 |

0 | 40 | 1 | 0 | 1.24 |

0 | 40 | 0 | 0 | 0.81 |

1 | 41 | 1 | 0 | 0.87 |

0 | 43 | 1 | 0 | 0.99 |

0 | 43 | 1 | 0 | 0.76 |

0 | 45 | 0 | 0 | 0.32 |

0 | 47 | 1 | 1 | 0.35 |

0 | 50 | 1 | 0 | 0.57 |

Answer #1

We have to test weather average tenure is no more than two years.

Let us suppose the hypothesis

Average Tenure (length of service) is more than 2 years

years

Average Tenure (length of service) is no more than 2 years

years (Left hand Tail)

Total number of observations n=70

mean length of service years

Standard deviation of length of service=s=1.098

The test stastic to test the hypothesis is given as

P value of test will be

P(T<-0.81)=0.211

**Because p value
is very high >0.05**

**We will fail to
reject null hypothesis**

**We conclude
that there is not sufficient evidence to support the claim that
average tenure is no more than 2 years**

Dataset:
Husband Wife
53 50
38 34
46 44
30 36
31 23
26 31
29 25
48 51
65 46
29 26
28 23
29 32
25 22
22 21
21 24
43 50
24 27
38 33
33 26
35 29
40 29
27 25
27 24
49 38
48 39
27 27
26 24
40 34
35 37
21 26
32 39
30 28
60 52
36 40
25 23
66 55
52 34
41 40
43 ...

Using the data from question 1, create a frequency table and a
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QUESTION 1 DATA- enter the following data from the 40
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reading scores:
31
32
43
42
24
34
25
44
23
43
24
36
25
41
23
28
14
21
24
17
25
23
44
21
13
26
23
32
12
26
14...

descriptive statistics
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4 8 18 20 21 22 23 24 25 26 27 28 29 30 31 31 32 32 33 33 34 35 36
37 38 39 47 53

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1) Data Set 1:
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48, 57, 27, 37
2) Data Set 2:
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14, 32, 24, 39, 30

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Greene and Touchstone conducted a study to relate birth weight
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i
Estriol (mg/24 hr) xi
Birth weight(g/100) yi
i
Estriol (mg/24 hr) xi
Birth weight(g/100) yi
1
7
25
17
17
32
2
9
25
18
25
32
3
9
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27
34
4
12
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____________________________________________
The results of a sample of 372 subscribers to Wired
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Previous surveys have revealed that the population standard
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What is the probability that another sample of 372 subscribers
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____________________________________________
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