Frequency Distribution and Sampling NB- Essay

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5. No. No. (i.e. this is neither a random sample nor simple random sample), because the females who attended the meeting were not selected and not all females in the company had an equal chance of talking to the personnel manager.

Reference

1. George W. Snedecor, & Cochran, William G. (1989). Statistical Methods (8th ed.): Blackwell Publishing Professional.

2. William G. Zikmund, & Babin, Barry J. (2007). Exploring Market Research 9th.

3. Graham Upton, & Cook, Ian (1996). Understanding Statistics: Oxford University Press.

Sheet1

Restaurant A Restaurant B

Range 44 46

Variance 260.79-285.64

Std 16.15-16.90

Ttest 0.72

Sheet2

Sheet3

Sheet1

Salary Mid interval salary, x x2 Employees, f f.x f. x2

5001-10000 7500.5 56257500.25-14 105007 787605003.50

10001-15000 12500.5 156262500.25-13 162506.5 2031412503.25

15001-20000 17500.5 306267500.25-18 315009 5512815004.50

20001-25000 22500.5 506272500.25-18 405009 9112905004.50

25001-30000 27500.5 756277500.25-17 467508.5 12856717504.25

Sum ?f ?fx ?fx2

80 1455040 30301455020.00

Mean 18188

Variance 47964843.75

Sheet2

Sheet3

Sheet1

Stores Cost of CD Restaurant A Restaurant B. Salary Mid interval salary, x x 2 Employees, f f.x f. x 2

1 298-120-115 5001-10000 7500.

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5 56257500.25-14 105007 787605003.50

2 125-123-126 10001-15000 12500.5 156262500.25-13 162506.5 2031412503.25

3 411-153-147 15001-20000 17500.5 306267500.25-18 315009 5512815004.50

4 157-128-156 20001-25000 22500.5 506272500.25-18 405009 9112905004.50

5 231-124-118 25001-30000 27500.5 756277500.25-17 467508.5 12856717504.25

6 213-118-110 Sum ?f ?fx ?fx 2

7 304-154-145 80 1455040 30301455020.00

8 272-110-137 Mean 18188

Std 90.72 Max 154-156 Variance 47964843.75

Min 110-110 Std 6925.6655817329

Range 44 46

Variance 260.79-285.64

Std 16.15-16.90

Waiting time Mid interval time, x x 2 Customers, f f.x f. x 2 Height Mid interval height, x x 2 Customers, f f.x f. x 2

0-3-1.5-2.25-13-19.5-29.25 70-71-70.5 4970.25 3 211.5 14910.75

4-7-5.5-30.25-16 88-484 72-73-72.5 5256.25 7 507.5 36793.75

8-11 9.5-90.25 8-76-722 74-75-74.5 5550.25-16 1192 88804

12-15-13.5 182.25-11-148.5 2004.75 76-77-76.5 5852.25-12-918 70227

16-19-17.5 306.25 0-0-0 78-79-78.5 6162.25-10-785 61622.5

20-23-21.5 462.25 2-43-924.5 80-81-80.5 6480.25 4 322 25921

Sum ?f ?fx ?fx 2 82-83-82.5 6806.25 1-82.5 6806.25

50 375-4164.5 Sum ?f ?fx ?fx 2

Mean 7.5-53 4018.5 305085.25

Variance 27.04 Mean 75.82

Std 5.2 Variance 7.54

Std 2.75.....

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