Do teenagers in various states differ in terms of how much time they spend on electronic devices? Twenty-five teenagers

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Do teenagers in various states differ in terms of how much time
they spend on electronic devices? Twenty-five teenagers were
randomly selected from each of three different states (25
from State A, 25 from State B, and 25 from State C) and
were asked to report the number of hours per day they spent on
electronic devices. The results for State A were a mean of 6
hours and an estimated population variance of 2.5 hours; for
State B, the mean was 5 hours with S2 = 1.75 hours; and for
State C, the mean was 4 hours, S2 = 1.5 hours.
What should you conclude? Use the .05 significance level.
a. Use the five steps of hypothesis testing.
b. Calculate the effect size.