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Test the significant difference between two sample Standard deviation.
Consider the following situation describing layoffs at a manufacturing plant of the Monsanto Company. Does there appear to be a case of age discrimination between those laid off and those non-laid off?
Employee
age
layoff status
1
51
no
2
58
3
48
4
53
yes
5
45
6
43
7
49
8
59
9
56
10
11
54
12
55
13
14
15
39
16
47
17
18
19
20
57
21
22
Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level.
Given that P (A) = 0.7, P (B) = 0.5, and P (A B) = 0.8. Find the following probabilities:
Which of the following statements regarding the coefficient of correlation is true. A value of 0.00 indicates two variables are not related.
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
Using multiple linear regression, compute the regression equation for the following data in Excel.
In optimal solution, determinethe critical path?
The Type 1 error states the probability of being wrong whenever:
Research question : At α = . 01, is degree of certainty independent of credits earned?
A pair of dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.)
A local group claims that the police issue more than 60 speeding tickets a day in their area.
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
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