The correlation between gpa and number of facebook friends

Assignment Help Basic Statistics

Reference no: EM13621023

Data were collected on GPA and number of Facebook friends for students in a small statistics class. Some summary statistics, partial output from the regression analysis are provided. Assume that the students in this class are typical of all students at a university.

Variable	Mean	St Dev	Minimum	Maximum
GPA	3.2067	0.4118	2.4000	3.9500
Facebook Friends	677.9	307.2	185.0	1500.0

The regression equation is GPA = 3.830 - 0.000919 Facebook Friends

Source	DF	SS	MS	F	P
Regression	1	2.31193	2.31193	24.85	0.000
Error	28	2.60534	0.09305
Total	29	4.91727

a) Determine whether we should have any strong concerns about the conditions being met for using a linear model with these data. Explain.

b) Write down the equation of the least squares line and use it to predict the GPA for someone with 800 Facebook friends.

c) The correlation between GPA and number of Facebook friends is -0.686. Use the correlation and signficance level of 5% to test for a negative linear association between GPA and number of Facebook friends. Include all details of the test.

Reference no: EM13621023

Questions Cloud

Is there sufficient evidence to indicate that customers are : green line a major discount stock brokerage in canada claims that customers calling in to make trades on the stock

Heat transfer from a certain stationary system occurs at a : heat transfer from a certain stationary system occurs at a rate of 10 kw. if the system performs work at a rate of 27

Suppose that the inductance is zero l 0 h in a series rcl : suppose that the inductance is zero l 0 h in a series rcl circuit. the rms voltages across the generator and the

A biologist has found that 40 of all brown bears are : a biologist has found that 40 of all brown bears are infected with trichinosis. 10 brown bears are tested for

The correlation between gpa and number of facebook friends : data were collected on gpa and number of facebook friends for students in a small statistics class. some summary

Dtermine a compression ratio b pv and t at four corners c : a two stroke four cylinder ideal otto engine operates at 4800rpm. air is taken in at 101 kpa and 20 centigrade. the

A sledge loaded with bricks has a total mass of 177 kg and : a sledge loaded with bricks has a total mass of 17.7 kg and is pulled at constant speed by a rope inclined at 19.5deg

A university dean wishes to estimate the average number of : a university dean wishes to estimate the average number of hours that freshmen study each week. the standard deviation

The cylinder volume is 2000 cm3 before compression and the : a four stroke eight cylinder otto engine operates at 2500 rpm and the compression ratio is 61. the cylinder volume is

User Account

All Pages