A researcher believes that college students spend less time participating in extra-curricular activites than they did ten years ago. An SRS of 100 college students found that in the past year the average number of hours spent per semester in extracurricular activities was x = 107 hours, with standard deviation s = 45 hours. Assume the distribution of the number of hours spent by college students per semester participating in extracurricular activities is approximately normal, with mean μ. Are these data evidence that μ has lowered from the value of 120 hours of ten years ago? To determine this

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