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

Statistic for business, Present the survey methodology which is going to be...

Present the survey methodology which is going to be used by describing primary and secondary data collection methods, population, sampling frame and sampling method/s, sample size

Inventory, An audit of the accounting records of Loch Ness Ltd. for the ye...

An audit of the accounting records of Loch Ness Ltd. for the year ending 30 June 2012 discovered that the ending inventory balance was over-valued by $35,000

Create a spreadsheet model and determine linear regression, 1. MMC's CEO, D...

1. MMC's CEO, Dr. Warren A. Beatty (Not the actor) believes that the demand trend for MMC is essentially linear. Thus, he wishes to determine if linear regression would be an effec

Normal distribution, For a normal distribution why do we calculate the prob...

For a normal distribution why do we calculate the probability of a range of numbers instead of the probability of a single number?

Co-efficient of covariance., solution of problems based on coefficient of c...

solution of problems based on coefficient of covariance

The value of its common stock, The Washington Corp stock has a β of 1.15 an...

The Washington Corp stock has a β of 1.15 and it will pay a dividend of $2.50 next year. The expected rate of return of the market is 17% and the current riskless rate is 9%. The e

Metaphor, writing a Introduction on Metaphor

writing a Introduction on Metaphor

Stability Criterion, Stability Criterion A survey of periodic table caref...

Stability Criterion A survey of periodic table carefully reveals that those elements in which N / Z = 1 or 1.6 are stable. Amongst these, the elements having even N and even Z ar

Explain the effects of the transactions, Explain the effects of the transac...

Explain the effects of the transactions on Accounting Equation under a Financial Accounting System. Ans. Under the Double Entry System each of the financial transaction bring the

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