Question

Because of the popularity of social media among college students, there is a great deal of...

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.

The daily mean time spent on Facebook by the students was x = 80 minutes with standard deviation sx = 15 minutes. The semester GPA of the participating students had mean y = 2.95 and standard deviation sy = 0.8. The correlation between time spent on Facebook and GPA was r = -0.35.
Question 1. Calculate the slope b1 and intercept b0 of the least squares prediction line  = b0 + b1x where the x-variable is time spent on Facebook and the y-variable is GPA.

slope (use 4 decimal places in your answer)
intercept (use 4 decimal places in your answer)
Question 2. What is the predicted GPA of a student that spends 70 minutes a day on Facebook?

(use 2 decimal places in your answer)

Question 3. What is the change in GPA for each additional 10 minutes per day spent on Facebook?

A decrease of 0.187An increase of 1.87    A decrease of 0.0187A decrease of 1.87An increase of 0.187An increase of 0.0187

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1


0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The presence of student-owned information and communication technologies (smartphones, laptops, tablets, etc.) in today's college classroom...
The presence of student-owned information and communication technologies (smartphones, laptops, tablets, etc.) in today's college classroom creates learning problems when students distract themselves during lectures by texting and using social media. Research on multitasking presents clear evidence that human information processing is insufficient for attending to multiple stimuli and for performing simultaneous tasks. To collect data on how multitasking with these technologies interferes with the learning process, a carefully-designed study was conducted at a mostly residential large public university in...
10. The paper "Facebook Use and Academic Performance Among College Students: A Mixed-Methods Study with a...
10. The paper "Facebook Use and Academic Performance Among College Students: A Mixed-Methods Study with a Multi-Ethnic Sample"† describes a survey of a sample of 66 male students and a sample of 195 female students at a large university in Southern California. The authors of the paper believed that these samples were representative of male and female college students in Southern California. For the sample of males, the mean time spent per day on Facebook was 102.31 minutes. For the...
Do male college students spend more time than female college students using a computer? This was...
Do male college students spend more time than female college students using a computer? This was one of the questions investigated by the authors of an article. Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent...
Do male college students spend more time than female college students using a computer? This was...
Do male college students spend more time than female college students using a computer? This was one of the questions investigated by the authors of an article. Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent...
Do male college students spend more time than female college students using a computer? This was...
Do male college students spend more time than female college students using a computer? This was one of the questions investigated by the authors of an article. Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent...
The table below gives the number of hours spent unsupervised each day as well as the...
The table below gives the number of hours spent unsupervised each day as well as the overall grade averages for seven randomly selected middle school students. Using this data, consider the equation of the regression line, yˆ=b0+b1xy^=b0+b1x, for predicting the overall grade average for a middle school student based on the number of hours spent unsupervised each day. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would...
Do female college students spend more time than male college students watching TV? This was one...
Do female college students spend more time than male college students watching TV? This was one of the questions investigated by the authors of an article. Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent watching...
Do female college students spend more time than male college students watching TV? This was one...
Do female college students spend more time than male college students watching TV? This was one of the questions investigated by the authors of an article. Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent watching...
The table below gives the number of hours five randomly selected students spent studying and their...
The table below gives the number of hours five randomly selected students spent studying and their corresponding grades. Using this data, consider the equation of the regression line, yˆ=b0+b1x, for predicting the grade that a student will earn based on the number of hours spent studying. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression line to make a prediction...
For a sample of 116 college students, the relationship between the reported hours of sleep during...
For a sample of 116 college students, the relationship between the reported hours of sleep during the previous 24 hours and the reported hours of study during the same period was studied. Data for y = hours of sleep the previous day and x = hours of studying the previous day for n = 116 college students were computed. Some regression results for those data are shown in the following table. Regression output Predictor Coef SE Coef T P Constant...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT