Question

# 10. The paper "Facebook Use and Academic Performance Among College Students: A Mixed-Methods Study with a...

H0: μ1 − μ2 = 0 Ha: μ1 − μ2 < 0 H0: μ1 − μ2 ≠ 0

 male Female sample mean x = 102.310 159.610 std deviation s= 115.000 115.000 sample size n= 66 195 std error se=s/√n= 14.156 8.235 degree freedom=(se12+se22)2/(se12/(n1-1)+se22/(n2-1))= 112
 Point estimate =x1-x2= -57.300 standard error of difference Se=√(S21/n1+S22/n2)= 16.3768 test statistic t =(x1-x2-Δo)/Se= -3.5

p value = 0.001

We reject H0. There is convincing evidence that the mean time spent on Facebook is not the same for males and for females.
b)

No, since the sample has been collected from Southern California and does not represent the population ,it is not reasonable to generalize the conclusion from the hypothesis test in part (a) to the populations of all male college students in the United States and all female college students in the United States

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