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Scores on the Wechsler Intelligence Scales for Children are standardized to have a mean of 100 and a standard deviation of 15. A sample of

Scores on the Wechsler Intelligence Scales for Children are standardized to have a mean of 100 and a standard deviation of 15. A sample of 44 students participated in an intervention meant to boost their scores on the test. The sample is found to have a mean of 108.

Calculate the effect size (round to the nearest 2 decimal places):

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