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

Find the correlation coefficient, We find the correlation coefficient and p...

We find the correlation coefficient and plot the scatter plot using excel as follows:   Time in Waiting Room      Heart Rate

Estimate the variables-statistically significant, The dataset also contains...

The dataset also contains a variable y , which is the dependent variable of interest, as well as x1 , x2 , x3 , x4 , x5 , and x6 , all explanatory variables that are potentially

Galvanometer to voltameter, a millemeter ammeter of resistance 5m amp is to...

a millemeter ammeter of resistance 5m amp is to be used to measure a potential difference of 50volt.calculate the multiplier resistance

Total stockholders equity, To determine the amount at which inventory shoul...

To determine the amount at which inventory should be reported on the December 31 Year 1 balance sheet, Monroe Company compiles the following information for its inventory of Produc

research problem , The abstract is a one-paragraph [200-300 words] summary...

The abstract is a one-paragraph [200-300 words] summary of what will be presented in the paper. The content that is required for the abstract includes [1-2 sentences each component

Find karl pearson''s correlation coefficient, Find Karl Pearson's correlati...

Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below:

Sampling Error, Use the concepts of sampling error and z scores to explain ...

Use the concepts of sampling error and z scores to explain the concept of distribution of sample means.

Demographic characteristics , Data   If you look at the Variable vie...

Data   If you look at the Variable view (at top of screen - select View and select variables), you will see the names of variables and information about each one.  The lab

T-distribution, How does the t-distribution changes its shape with the chan...

How does the t-distribution changes its shape with the change of the size of the sample?

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