Land's Bend sells a wide variety of outdoor equipment and clothing. The company sells both through mail order and via the internet. Random samples of sales receipts were studied for mail order sales and internet sales, with the total purchase being recorded for each sale. A random sample of 12 sales receipts for mail order sales results in a mean sale amount of $94.50 with a standard deviation of $19.25. A random sample of 17 sales receipts for internet sales results in a mean sale amount of $81.80 with a standard deviation of $20.75. Using this data, find the 80 % confidence interval for the true mean difference between the mean amount of mail order purchases and the mean amount of internet purchases. Assume that the population variances are not equal and that the two populations are normally distributed. Step 1 of 3: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Exercise D21 What are some reasons that the economy might be in a recession, and what is the appropriate government action to alleviate the recession?

Exercise A5 How does the appearance of positive slope differ from negative slope and from zero slope?

Metropolitan Hospital has estimated its average monthly bed needs as N=1,000+9X where X=timeperiod(months);January2002=0 N=monthlybedneeds Assume that no new hospital additions are expected in the area in the foreseeable future. The following monthly seasonal adjustment factors have been estimated, using data from the past five years: Forecast Metropolitans bed demand for January, April, July, November, and December 2007. If the following actual and forecast values for June bed demands have been recorded, what seasonal adjustment factor would you recommend be used in making future June forecasts?

Exercise B6 What is a substitution effect?

Exercise D11 Why does the import function slope down? What is the marginal propensity to import?

Exercise D17 Will an economy with a high multiplier be more stable or less stable than an economy with a low multiplier in response to changes in the economy or in government policy?

The Questor Corporation has experienced the following sales pattern over a 10-year period: Compute the equation of a trend line (similar to Equation 5.4) for these sales data to forecast sales for the next year. (Let 2004=0,2005=1, etc., for the time variable.) What does this equation forecast for sales in the year 2014? Use a first-order exponential smoothing model with a w of 0.9 to forecast sales for the year 2014.

Exercise B4 How many indifference curves does a person have?

Exercise B3 Why are indifference curves sleep on the left and flatter on the right?