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Five workers are available to perform four jobs. The time it takes each worker to perform each job is given in Table.
Time (Hours)
Worker
Job 1
Job 2
Job 3
Job 4
1
10
15
2
12
8
20
16
3
9
18
4
6
5
The goal is to assign workers to jobs so as to minimize the total time required to perform the four jobs. Use the Hungarian method to solve the problem.
Using Coefficient of Variation determine in which year do the ages show a more dispersed distribution? Show your complete work and support your answer.
With a sample standard deviation of 33 miles. At the 0.05 level of significance is there a difference in the mean number of miles traveled between the two groups?
What is the range of correlation coefficient? Give a real world example of positive and negative correlation. Do you want stocks which are highly correlated with each other or less correlated? Why?
At the 5% level of significance, test whether the proportion of internet users paying bills online is now more than 50%.
What sample size would be needed to estimate he population mean to within one-half standard deviation with 95% confidence?
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group, (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class.
Do men and women have different beliefs on the ideal number of children in a family? Based on the following GSS2008 Data and the obtained t statistics, what would you conclude?
Tweleve cases of leukemia are reported in people living in a particular census tract over a 5 year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer incidence rates?
Determining the strength of a correlation is very important to determine how well one variable can predict another. To determine the strength of a correlation, we have to calculate the correlation coefficient, r.
If we add the absolute values of -3 and -5, we get 8. Using the distributive property to remove the parentheses.
1 does correlation equal causation? does the strength of correlation depend on the direction of the relationship? what
Help with showing how do detrime the standard deviation of a problem when the standard deviation is 5. An example would help me to work out a problem for the normal probability distribution.
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