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Does the data appear the strength of the relationship between variables is sufficient to warrant using linear regression forecasting?Carpet City wants to develop a means to forecast its carpet sales. The store manager believes that the store's are directly related to the number of new housing starts in town. The manager has gathered data from county records on monthly house construction permits and from store records on monthly sales. These data are as follows:Monthly Carpet Sales (1,000 yd.) Monthly Construction Permits5 2110 354 103 128 162 912 4111 159 1814 26a. Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.b. Determine the strength of the causal relationship between monthly sales and new home construction by using correlation.
The probability of the patient being chosen at random as having meningitis as only site of infection is?
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
Regression equation to predict the dependent variable using multiple regression analysis:
See if there is a difference in their means and variances.
Perform a hypothesis test by using.04 level of significance to find out if there is a difference between the population means.
Make up a scatter diagram with 10 dots for each of the following situations:
Write a one-page report to Ms. Gupta presenting your conclusions regarding the market performance of Brand 1.
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
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