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A state law enforcement agency has come up with three different methods for publicizing burglaryprevention measures during vacation periods. Recognizing that there are more burglaries in larger communities than in smaller communities, three communities have been randomly selected from each size category, then assigned to a treatment group.
The accompanying results are the number of home burglaries during the test month for communities in which the respective publicity methods were employed. Use the 0.05 level in comparing the publicity techniques.
Historically, 70% of your customers at Rodale Emporium pay for their purchases using credit cars. In a sample of 20 customers, find the probability that
They have recorded the steady increase of the sales of these walking slippers every month. They want to figure out the upward trend in sales so they create a trend line and use linear analysis to use the slope of the line to predict sales in futur..
Determine the sample size necessary under the following conditions. To estimate with = 44, E = 3, and 95% confidence. To estimate with a range of values from 20 to 88 with E = 2 and 90% confidence.
Do you agree or disagree? Discuss briefly. Notes. "Baseline characteristics" are characteristics of subjects measured at the beginning of the study, i.e., just before randomization. The quote, slightly edited, is from Victora et al (2004).
A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard dev..
Construct a frequency distribution of grouped scores with approximately 10 intervals.- Construct a histogram of the frequency distribution constructed in part a.
When considering the comfort and safety of the passenger which result is more relevant . the result from (a) or the probability from part (B) ? Pls explain why
The company investigating the golf balls is not satisfied with the limited analysis that it has done. The managers have collected a good deal of data, but they are not sure how to look at them and interpret the output.
For the period from 1918 to the present, in a random sample of 9 wolves spotted in the region, what is the probability that 6 or more were male.
State the null and alternative hypothesis for this test. What is the t-statistic? Show how this t-statistic was calculated. What is the result of the hypothesis test
Estimate a multiple regression model that answers your research question. Post your response to the following:
What is the correlation between Age Difference and Year?- Interpret the slope of this line.- Predict the average age difference in 2015.
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