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Use the data in the table to answer Questions 26 through 28.
x 3 1 4 4 5y 2 -2 5 4 8
Determine SSxx, SSxy, and SSyy.Find the equation of the regression line. What is the predicted value when x = 4?Is the correlation significant at 5% significance level (95% confidence level)? Why or why not?
A rental agent claims that the mean monthly rent, , for apartments on the east side of town is less than $675 . A random sample of 18 monthly rents for apartments on the east side has a mean of $661, with a standard deviation of $24.
A machine is set to produce tennis balls so the mean bounce is 36 inches when the ball is dropped from a platform of a certain height. The supervisor suspects that the mean bounce has changed and is less than 36 inches.
Is there sufficient evidence to indicate that the mean annual percentage turnover for U.S. plants exceeds the corresponding mean percentage for Japanese plants?
Over the past decade, there has been a strong positive correlation between teachers salaries and prescription drug cost.
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
The following are average weekly inventory costs in thousands of dollars for two proposed inventory control policies. The values were obtained from independent replications of a simulation model of the system.
Assume a factory manager wishes to buy machines to perform a certain task in a production process. Certain key parts are produced by these machines.
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
Same survey showed that average length of time each store was in business in 6 years, with standard deviation of 2.5 years. Which is more variable, number of magazines or number of years?
Using goodness-of-fit test and.01 level of significance, find out whether accidents are evenly distributed all through the day. Write a short description of your conclusion.
Department store accepts three types of credit cards, MasterCard, Visa, and their own store card. Charges are normally distributed. A random sample of 18 credit card purchases included 6 MasterCard
Find the minimum sample size needed using a prior study that found that 36% of the respondents said they support abolishing the penny.
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