Linear regression, Basic Statistics

Assignment Help:

Question:

Students in a science class have just received their grades on the first test.  The instructor has provided information about the first test grades in some previous classes as well as the final average for the same students.  Some of these grades have been sampled and are as follows:

Student

1

2

3

4

5

6

7

8

9

1st Test Grade

98

77

88

80

96

61

66

95

69

Final Average

93

78

84

73

84

64

64

95

76

a) Develop a linear regression model that can be used to predict the final course average based on the first test grade for these nine students.  Provide the correct independent and dependent variables and provide the linear regression relationship in terms of these independent and dependent variables.

b)  Predict the final average of a student who made an 83 on the first test. 

c) Would you recommend using this relationship for forecasting the final averages?  Why?  Base your recommendation on analytical reasons. 

d)  Suppose a student scored a 41 on the first test.  Predict the final average of a student who had this score?  What cautions would you recommend about using this linear regression relationship for predicting a final average?


Related Discussions:- Linear regression

Inquiry, factors considered when carrying out an inquiry

factors considered when carrying out an inquiry

Probability, A survey was done where a random sample of people 18 and over ...

A survey was done where a random sample of people 18 and over were asked if they preferred comedies, dramas, or neither. The information gathered was broken down by age group and t

Compute the outlier diagnostics, Use the following four data sets for probl...

Use the following four data sets for problem 1.  Be aware that this is a very interesting series of data sets with some special properties. I do not have data files for these data,

Research, tools and techniques used in quantitative research

tools and techniques used in quantitative research

Rolling Dice, I roll a fair die n times and don’t see the face 1 in the fir...

I roll a fair die n times and don’t see the face 1 in the first r rolls (r

Definition of Capital Market, Definition of capital market is termed as a m...

Definition of capital market is termed as a market where shares are traded after an initial issue. Capital market is the market where corporations, companies, and government debt

Operation research, A paper mill produces two grades of paper viz., X and Y...

A paper mill produces two grades of paper viz., X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y paper i

Generally accepted accounting principles-gaap, Generally Accepted Accountin...

Generally Accepted Accounting Principles-GAAP:  GAAP is an Americanized term for the accounting standards and procedures that need to be followed by companies while compiling their

Fertility-define the annual crude birth rate, Fertility:  In order to study...

Fertility:  In order to study at which speed, at which the population is increasing, fertility rates are used which are of various types? Important among these are: Crude birth rat

What is the probability, Suppose the entire cola industry produces only two...

Suppose the entire cola industry produces only two colas viz., Pepsi and Coke.  Given that a person last purchased Pepsi, there is 90% that his next purchase will be Pepsi.  Given

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd