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

Chi Square and Z tests, What is it that created the numerical relationship ...

What is it that created the numerical relationship between a chi square test and a z test?

Material & labour variances, standard material qty per unit- 2 kg standard ...

standard material qty per unit- 2 kg standard price per kg - 4 rs actual value of material purchased- 4000 rs closing stock- 200 kg actual usage- 2.5 kg finished stock sold- 200 u

Quantitative techniques and decision making, Let the national income model ...

Let the national income model be: Y= c+1+G C=20+0.6y I=0.2y G=20 Where y= income, C= consumption, I= investment and G=government expenditure find y, C and I from the model. By quan

What is univariate and bivariate data, Q. What is Univariate and Bivariate ...

Q. What is Univariate and Bivariate Data? Ans. Univariate data is data gathered about a single variable. Univariate studies could include a study of the amount paid by Am

Standard price, Stock at hand 1000 unit at #0.80 each, received 2000 units ...

Stock at hand 1000 unit at #0.80 each, received 2000 units at #1.10 each,

Card custodian, Card custodian An person who is assigned responsibility of...

Card custodian An person who is assigned responsibility of purchase card security & issuance of cards to authorized users,

Momentum and energy, Momentum and Energy Statement 1: If there is a defin...

Momentum and Energy Statement 1: If there is a definite force there is a definite displacement, which means that work is done definitely by the force. And Statement 2: The wor

Cost behavior/classificationq, Shipping costs on Merchandise sold--it is a ...

Shipping costs on Merchandise sold--it is a variable cost, but is it a selling/adminstrative cost or product cost? Is it direct or indirect?

Opertions research, meaning and definition of operations rsearch

meaning and definition of operations rsearch

Answer, Would like to know answer to gametes problem

Would like to know answer to gametes problem

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