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How Much More Effective is it to Test Yourself in Studying? We have found that students who study by giving themselves quizzes recall a greater proportion of words than students who study by reading

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How Much More Effective is it to Test Yourself in Studying? We have found that students who study by giving themselves quizzes recall a greater proportion of words than students who study by reading. Also, we see that there is an effect, but often the question of interest is not "Is there an effect?" but instead "How big Is the effect ?" To address the second quest on, use the information given below to find  a 90  % confidence into a for the difference in proportions P1-P2. where P1 represents proportions  of items correctly recalled by all students who study using a self quiz method and P2 represents the proportion of items correctly recalled by all students who study using a reading only approach. Assume that the standard error for a bootstrap distribution of chorines is also about 0.07 The proportion of items correctly recalled was 0.15 or the reading-study group and 0.42 for the self-quiz group. Round your answers to two decimal places. The 95% confidence intervals to ?