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A company sells bumper stickers through two channels: online and via retail locations (gas stations, car washes, etc.) across the country. Each month, online sales average 15k units with a standard deviation of 2k units. Total monthly retail sales (across all distributors) average 40k units with a standard deviation of 8k units.
The correlation between online and retail sales is 0.30. What is the standard deviation for total monthly sales (in units) across both channels?
a study is conducted to compare mean cholesterol levels for individuals following a low carbohydrate diet for at least
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as an occupational health epidemiologist you are required to measure the effect of stress on the workers in your
The questions below are based on the following "Determining ASA Mass Activity." Step 1: crush 1 ASA tablet using a clean dry mortar and pestle. Weigh crushed tablet and determine mass is actually 0.500g
a car enthusiast hypothesized that the average horsepower of 8 cylinder cars was less than 475. a random sample of 15
a study of the time spent shopping in a supermarket for a market basket of 20 specific items showed an approximately
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If the scores of 10 students in an examination are 87, 74, 66, 95, 83, 80, 90, 70, 56, and 75, find the standard deviation of these scores.
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the following estimated regression equation relates sales to inventory investment and advertising expenditure.
The International Council of Shopping Centers reports that the average teenager spends $39 during a shopping trip to the mall.- Identify and interpret the p-value for the test. Using the 0.025 level of significance, what conclusion do you reach?
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