A study of the role of spreadsheets in planning in 55 small firms de fined Y = "satisfaction with sales growth" and X = "executive commitment to planning." Analysis yielded an overall correlation of r = .3043. Do a two-tailed test for zero correlation at α = .025.
Answer to relevant QuestionsIn a study of stock prices from 1970 to 1994, the correlation between Nasdaq closing prices on successive days (i.e., with a 1-day lag) was r = .13 with a t statistic of 5.47. Interpret this result. In the following regression, X = total assets ($ billions), Y = total revenue ($ billions), and n = 64 large banks. (a) Write the fitted regression equation. (b) State the degrees of freedom for a two-tailed test for zero ...Below are recent financial ratios for a random sample of 20 integrated health care systems. Operating Margin is total revenue minus total expenses divided by total revenue plus net operating profits. Equity Financing is fund ...(a) Interpret the slope of the fitted regression Sales = 842 – 37.5 Price. (b) If Price = 20, what is the prediction for Sales? (c) Would the intercept be meaningful if this regression represents DVD sales at Blockbuster? A regression model to predict the price of diamonds included the following predictor variables: the weight of the stone (in carats where 1 carat = 0.2 gram), the color rating (D, E, F, G, H, or I), and the clarity rating ...
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