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Question: Living on campus. A February 2, 2008, article in the Columbus Dispatch reported a study on the distances students lived from campus and average GPA. Here is a summary of the results:
Residence Avg. GPA
Residence hall 3.33
Walking distance 3.16
Near campus, long walk or short drive 3.12
Within the country, not near campus 2.97
Outside the country 2.94
Based on these data, is the association between the distance a student lives from campus and GPA positive, negative, or near 0?
The personnel director of a large firm has summarized a random sample of last year's absentee reports in the accompanying contingency table. At the 0.01 level of significance, test the independence of age versus length of absence.
Similar to the previous week's Discussion, this Discussion assists in solidifying your understanding of statistical testing by engaging in some data analysis. This week, you will once again work with a real, secondary dataset to construct a resear..
Calculate the safety stock for PVBs for each quarter. (σQ1 = 1877, σQ2 = 3361, σQ3 = 3851, σQ1 = 1877 and σQ4 = 8154). Assume the formula SS = z σtL1/2. Create a APP that minimises costs.
Use an alpha level of .01 and test the hypothesis that the two methods are producing the same mean.
Calculate the probability that fewer than 320 out of the n=750 adults over 65 in the study suffer from one or more of the conditions under consideration.
The sampled results show that sample mean and standard deviation were $52.00 and $17.50, respectively. Use this information to create a 95% confidence interval for the mean.
Determine the least-squares regression line and interpret its slope. Estimate the net income if the operating revenue figure is $2500 million.
Are there any cities that appear to be outliers because they don't fit the pattern of the rest of the data? If so, which city or cities are they?
as a person who understands and uses statistics to solve problems in business you know that you must use the right
An urn contains four red balls and four white balls. An experiment consists of selecting at random a sample of four balls and recording the number of red balls in the sample. Set up the probability distribution and compute its mean and variance.
Thus, the first question he examines is as follows: Is there a difference in the number of points students earned on their educational statistics pretests and posttests?
the pulse rates for 13 adult women were as follows. construct a 0.95 confidence interval for the mean pulse rate. give
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