STAT1201 - Semester One 2022
Lecture 7.1 - Comparing two populations - Part 1
Dr. Wasanthi Thenuwara
05/04/2022
,Comparing two population (group) means
I In lectures 5.1 and 5.2 we discussed how to perform hypothesis
test and develop confidence intervals for a single population
I In scientific research, it is important, in many occassions to
compare two populations or two groups
I Examples
I Comparing effectiveness of two drugs.
I Comparing the effect of caffeinated and decaffeinated drinks on
pulse rate.
I Comparing the nitrogen content of two lakes.
I Comparing the tomato yields for two types of fertiliser.
, Comparing two population (group) means - Learning
objectives
In this lecture, you will learn how to
I Perform hypothesis test to compare means of the two
independent populations using t-distribution (i.e: two sample
t-test).
Lecture 7.1 - Comparing two populations - Part 1
Dr. Wasanthi Thenuwara
05/04/2022
,Comparing two population (group) means
I In lectures 5.1 and 5.2 we discussed how to perform hypothesis
test and develop confidence intervals for a single population
I In scientific research, it is important, in many occassions to
compare two populations or two groups
I Examples
I Comparing effectiveness of two drugs.
I Comparing the effect of caffeinated and decaffeinated drinks on
pulse rate.
I Comparing the nitrogen content of two lakes.
I Comparing the tomato yields for two types of fertiliser.
, Comparing two population (group) means - Learning
objectives
In this lecture, you will learn how to
I Perform hypothesis test to compare means of the two
independent populations using t-distribution (i.e: two sample
t-test).
