Grades and Social Media ~ A college student
wants to find out whether there is a relationship between time
spent in minutes on social media platforms per day throughout the
semester and the end of term percentage grade. The student collects
a random sample of 20 students and records the time spent in
minutes and the end of term percentage grades.
Minutes spent on social media is the X variable and End of term
percentage grade is the Y variable in this scenario.
R output Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 103.884 2.8426 36.545 < 2e-16 *** Minutesspent -0.1683 0.0213 -7.635 4.73e-07 *** --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Residual standard error: 4.89 on 18 degrees of freedom Multiple R-squared: 0.7641, Adjusted R-squared: 0.751 F-statistic: 58.3 on 1 and 18 DF, p-value: 4.732e-07 |
What is the lower bound for a 90% confidence interval for the true slope β1β1 of the regression line? Give your answer to 4 decimal places.
Given that ,
df = 18
Critical value = 1.330
Lower bound = -0.1683 - 1.330 * 0.0213 = -0.1966
Grades and Social Media ~ A college student wants to find out whether there is a...
Because of the popularity of social media among college students, there is a great deal of interest in the relation between Facebook use and academic performance. To investigate this relation, an extensive study of over 1700 students was conducted at a public university in the northeast. For one semester the time (in minutes) spent each day on Facebook was recorded for each student. The students also agreed to allow their GPA for that semester to be used in the study....
Because of the popularity of social media among college students, there is a great deal of interest in the relation between Facebook use and academic performance. To investigate this relation, an extensive study of over 1700 students was conducted at a public university in the northeast. For one semester the time (in minutes) spent each day on Facebook was recorded for each student. The students also agreed to allow their GPA for that semester to be used in the study....
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