Question: QUESTION 9 An educational psychologist wants to test whether a new teaching method negatively affects reading comprehension scores using a significance level of 0.10A sample

QUESTION 9 An educational psychologist wants to test whether a new teaching method negatively affects reading comprehension scores using a significance level of 0.10A sample of 301 students taught with the new method has a mean reading comprehension score of 78.6 . The population of all students taught using the old method has a mean reading comprehension score of 78.1 and a standard deviation of 10.3 . Assume scores are distributed normally . What is the value of Cohen's d Enter value with three decimals .

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