Help!!!!!!!! I’m taking a test!
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Answer:
The Cohen's d effect size is 0.05.
Step-by-step explanation:
The Cohen's d effect size is a numerical value that indicates the standardized difference between two means.
It is provided that the mean time to complete an experimental task reported by the researcher is,
Since the standard deviation of the population is not provided we will use a one-sample <em>t</em> - test to perform the analysis.
The formula of Cohen's d effect size in case of one-sample <em>t</em> - test is:
Compute the value of Cohen's d effect size as follows:
Thus, the Cohen's d effect size is 0.05.