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To test whether there is significant mean difference between two groups using independent sample t test.
The managers in a company's East and West region were rated on the basis of the company's evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform the calculation.
Region
Manager
Rating
West
1
74
East
81
2
88
63
3
78
56
4
85
68
5
100
80
6
114
79
7
98
69
Solve different inventory control problems using an appropriate OR method.
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Assuming the population is large, which sample size will give the smallest standard deviation to the statistic and select the numbers for the first five to be interviewed.
Determine the probability that sample mean is between 7.5 and 8 minutes?
A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
The researcher computes the sum of squares for groups as SSG = 40030 and the sum of squares for error as SSE = 414780. The numerical value of the ANOVA F statistic is
To select a _________ sample, an intact group of subjects that represent the population is selected.
Why might driver be tempted not to use seat belt "just on this trip"?
Find the critical F value for the Following,
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
Suppose it costs $25 per student for the administrators to provide the course materials.
Find the value for the correlation coefficient r.
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