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An AP Statisctics group asked an SRS of 20 boys at their school how many shoes they have. A 95% confidence interval for the difference in the population means (girls - boys) is 10.9 to 26.5.
1) Interpret the confidence interval.
2) Interpret the confidence level.
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Carpet City wants to develops a means to forecast it carpet sale. The store manager believes that the store's sale are directly related to the number of new housing starts in town.
Find the upper and lower control limits for x and r charts for the width of a chair seat when the sample grand mean (based on 30 samples of 6 observations each) is 27.0 inches, and the average range is 0.35 inches.
a soft drink dispenser is set to automatically dispense drinks and ice in 8 oz. cups. the machine is set to fill the
medical tests were conducted to learn about drug-resistant tuberculosis. of 142 cases testedin new jersey 9 were found
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
If the standard deviation of the process is unknown, another approach is to use the sample range as a measure of process variability. Calculate the control limits for the above process using the sample range.
Conduct the appropriate analysis to determine if there was an effect of the music on completing problems. Construct the appropriate graph to show the differences in the scores of the two groups.
In how many ways can a committee of 6 members be selected from out of these 12? Find the probability that a random committee contains all males?
a mens clothing store has ordered 36 shirts with various patterns. inventory records show 20 different styles of ties
What is the probability that all 3 would iPods from best buy? Or at least one would have iPod from best buy?
1. what are the assumptions of the simple linear model?2. name three assumptions of the anova
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