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Question: A local school introduces a new academic program designed to improve students; grade point average (GPA) scores. To test the program, they select a sample of 10 students and measure the difference in their GPA scores before and after this program. Test whether or not scores improved following this program using the related-samples sign test at a .05 level of significance and state whether to retain or reject the null hypothesis.
Test appropriate hypotheses and state your conclusion.- The boxplots of the two distributions show an outlier among the data north of Derby. What effect might that have had on your test?
It is believed that the number of kilometers driven by a tourist in the program is normally distributed with mean 4,500 and standard deviation 1,800. If a country wants to set the mileage limit at a point such that 80% of the tourists in the progr..
In a large department store a customer-complaints office handles an average of six complaints per hour about the quality of service.
derive expression of slope at support and deflection at centre of simply supported beam with centre load
a random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. assuming that the
Survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
Which of the following tests analyzes the difference between the means of two independent samples?
A. Verify the regression model assumptions. B. Perform the hypotheses test for the linear relationship between x and y, using level of significance =0.05. The accompanying table shows the teams winning percentage (x) and power rating (y) for the 2011..
Find a 95% confidence interval for the difference in their free throw percentages.- Based on your confidence interval, is it certain that Korver is better than Carroll at making free throws?
In 1851 there were 25,466 nurses in Great Britain. Find the probability that a British nurse selected at random in 1851 would be 60 years or older. (My guess is The sum of the percent of nurses 60 years are older are added equaling 36% or 1967.76/2..
a television sports commentator wants to estimate the proportion of citizens who follow professional football. complete
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 93 percent confident that the true proportion is estimated to within 0.014?
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