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Category: Math Homework
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Experience:  B.S. in Civil Engineering
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# QUESTION 26 Independent random samples were taken from

### Customer Question

QUESTION 26
Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under (a) a fixed-position layout (n = 7) and (b) a project layout (n = 8). The company wants to know if the variances in the yearly production of ships for the 2 layouts are equal. The sample variances (s2) are: fixed-position layout = 9, project layout = 4. Use .10 for the level of significance.
QUESTION 27
An advertising firm is trying to determine the demographics for a new product. They have randomly selected 75 people in each of 5 different age groups and introduced the product to them. The results of the survey are given below. At a = 0.01, test whether there is any difference in projected buying patterns among the different age groups.
FUTURE ACTIVITY
AGE GROUP
18-29
30-39
40-49
50-59
60+
12
18
17
22
32
18
25
29
24
30
45
32
29
29
13
The manager of the Neuse River Bridge is concerned about the number of cars “running” the toll gates and is considering altering the toll-collection procedure if such alteration would be cost-effective. She randomly sampled 16 hours to determine the rate of violation. The resulting numbers of violations per hour were: 7, 6, 5, 8, 9, 7, 10, 4, 5, 7, 6, 8, 6, 9, 8, 7. Determine the 95% confidence interval for the population mean (µ).
Submitted: 6 months ago.
Category: Math Homework
Expert:  Ryan replied 6 months ago.

Hi,

Thank you for using the site. I'll be happy to help you with these problems. I'll have the solutions posted for you as soon as possible.

Thanks,

Ryan

Customer: replied 6 months ago.
Thanks. I need it in 2 hours. Is that ok?
Expert:  Ryan replied 6 months ago.

That shouldn't be any problem.

Customer: replied 6 months ago.
it would be so great if you could answer is faster,
Expert:  Ryan replied 6 months ago.

I'm working on them right now.

Expert:  Ryan replied 6 months ago.

Hi again,

Here are the solutions:

Statistics

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