Question

Call centers typically have high turnover. The director of human resources for a large bank has...

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
Math   Statistics-And-Probability   
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Homework Answers

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

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