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3. Calculation practice: Confidence interval for the difference between two means. Return to the data about the percentage of dreams in color as a function

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3. Calculation practice: Confidence interval for the difference between two means. Return to the data about the percentage of dreams in color as a function of age from Practice Problem 2. Determine a 95% confidence interval for the difference in mean percent of color dreams between the older and younger groups. a. If you have not done so already from the previous problem, calculate the standard

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