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The presence of student-owned information and communication technologies (smartphones, laptops, tablets, etc.
Question 1. Do texting and Facebook use during class have a negative affect on GPA? To answer this question calculate a 95% confidence interval for μ1−μ2 where μ1 is the mean semester GPA of all students who text and use Facebook frequently during class and μ2 is the mean semester GPA of all students who do not text or use Facebook during class (do NOT use the approximation formula minimum(n1-1, n2-1) for the degrees of freedom).
lower limit of confidence interval (use 2 decimal places)
upper limit of confidence interval (use 2 decimal places).
Pooled-Variance t Test for the Difference Between Two Means(assumes equal population variances)DataHypothesized Difference0Level of Significance0.05Population 1 SampleSample Size65Sample...