MA3110: Module 6 Correlation and Regression
Exercise 6.1
Linear Correlation
In this exercise, you will solve three questions, where you will be asked to calculate a linear correlation
coefficient and determine whether there is a linear correlation between
MA3110: Module 5 Chi Square and Anova
Exercise 5.1
Inferences from Two Samples
This exercise has the following two tasks:
Task 1: Consider the three samples listed in the table:
A
B
C
1
0
3
3
6
12
5
2
6
5
3
2
Obtain the sample mean and the sample standard
MA3110: Module 5 Chi Square and Anova
Exercise 5.2
Chi Square Procedures
Read the following information and answer the corresponding questions:
The following table contains data of region of birth and political party of the rst 44 U.S. presidents. The
tab
MA3110: Module 4 Hypothesis Testing
Task 1: Solve the following problems:
A student of the author surveyed her friends and found that among 20 males, 4 smoke
and among 30 female friends, 6 smoke. Give two reasons why these results should not
be used for
MA3110: Module 4 Hypothesis Testing
Solve the following problems:
Examine the given statement:
1.
The proportion of people aged 1825 who currently use illicit drugs is equal to 0.20
(or 20%). Express the null hypothesis H0 and the alternative hypothesis H
Module 5: Exercise 5.2 Chi Square Procedures
What is the population under consideration?
The Presidents of the US.
What are the two variables under consideration?
Region of birth and political party of US Presidents.
Group the bivariate data for the varia
MA3110: Module 5 Chi Square and Anova
What does treatment mean square (MSTR) measure?
The mean squared error of an estimator of a parameter is the expected value of the square of
the difference between the estimator and the parameter.
What does error mean
QUIZ 1
1. Find the sample standard deviation of the ages of a sample of ages of five U.S residents. 21 54 9 45 51
Answer
19.9 years
2. Data Set A had more variation than Data Set B. Decide which of the following statement is necessarily
true.
Answer
Data