homework in pearson

6 easy question about Inferences Based on a Two sample,

some thing like this:

Researchers compared earnings forecasts of buy-side and sell-side financial analysts. Data were collected on 4 comma 9254,925

forecasts made by buy-side analysts and

42 comma 98742,987

forecasts made by sell-side analysts, and the relative absolute forecast error was determined for each. The mean and standard deviation of forecasts errors for both types of analysts are given in the accompanying table. Complete parts a through c below.


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