Question

Test, at the 1% level of significance, whether the average business has more than 15 employees.

Answer using excel.

Employees |

14 |

17 |

17 |

6 |

8 |

17 |

21 |

16 |

6 |

17 |

11 |

17 |

15 |

16 |

20 |

19 |

6 |

12 |

17 |

22 |

20 |

17 |

11 |

11 |

9 |

22 |

17 |

18 |

21 |

20 |

26 |

7 |

16 |

19 |

18 |

11 |

21 |

17 |

25 |

16 |

22 |

14 |

14 |

16 |

18 |

20 |

21 |

11 |

19 |

13 |

6 |

11 |

19 |

14 |

18 |

31 |

13 |

15 |

17 |

21 |

10 |

20 |

21 |

16 |

14 |

20 |

8 |

26 |

10 |

15 |

Answer #1

For given sample averager value is and standard deviation is

Now here claim is that the average business has more than 15 employees.

So hypothesis here is vs

Sample size is n=70>30

So we will use z statistics

So P value is

As P value is greater than alpha, we fail to reject the null hypothesis

Hence there is no sufficient evidence to support the claim that mean is greater than 15

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a population mean value of μ = 13 and a population standard
deviation of σ = 6.26. Using the given data, test whether this mean
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hypothesis. The significance level alpha is set at 0.05 . The
original data of time taken is given below. Show the process by
using excel (Formulas).
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Assuming that the population standard deviation is
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population mean.
The following is the data. Calculating Process should be shown
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7
21
23
24
18
16
2
19
11
6
3
13
17
9
5
12
13
17
4
14
15
25
12
24
22
14
14
20
15
11
26
17
21
11
4
13
16
14
13
14
25
23
9
15...

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____________________________________________
The results of a sample of 372 subscribers to Wired
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spends less than 19.00 hours per week using the Internet?
____________________________________________
Develop a 95% confidence interval for the population mean
____________________________________________
If the editors...

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14 16 7 10 12 19 15 16 14 9 12 21 13 10 16 12 16 13 17 17 13 14 18
11 12 15 16 13 18 16 17 12 12 14 9 11 14 19 13 11 17 11 13 15 14 18
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32
8
14
20
28
19
37
31
16
16
16
29
11
34
31
18
22
17
27
16
24
49
25
18
25
21
15
16
20
11
21
29
14
25
10
15
8
12
12
19
21
28
27
26
12
24
18
19
24
16...

A company has the following returns over the past 30 months:
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Is there enough evidence that the average number of PURPLE
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Package
Red
Orange
Yellow
Green
Purple
Total
Dominant Color
1
15
15
16
12
14
72
Y
2
13
6
11
16
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61
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9
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