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Math 203_Lecture 13

# Math 203_Lecture 13 - Principles of Statistics 1 Lecture 13...

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Principles of Statistics 1 Lecture 13: Math 203 Abbas Khalili Department of Mathematics and Statistics McGill University May 24, 2011 Principles of Statistics 1 Lecture 13: Math 203 – p. 1/5

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Chapter 9 Inferences based on two samples Principles of Statistics 1 Lecture 13: Math 203 – p. 2/5
Introduction There are situations where a researchers is interested in comparison of two populations: Principles of Statistics 1 Lecture 13: Math 203 – p. 3/5

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Introduction There are situations where a researchers is interested in comparison of two populations: A sociologist may want to estimate the differences in mean life expectancy between inner-city and suburban residents. Principles of Statistics 1 Lecture 13: Math 203 – p. 3/5
Introduction There are situations where a researchers is interested in comparison of two populations: A sociologist may want to estimate the differences in mean life expectancy between inner-city and suburban residents. A consumer group wants to test whether two major brands of food freezers differ in the average amount of electricity they use. Principles of Statistics 1 Lecture 13: Math 203 – p. 3/5

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Introduction There are situations where a researchers is interested in comparison of two populations: A sociologist may want to estimate the differences in mean life expectancy between inner-city and suburban residents. A consumer group wants to test whether two major brands of food freezers differ in the average amount of electricity they use. The school board wants to test whether a new method of teaching math. to first year elementary students is better than the current method. Principles of Statistics 1 Lecture 13: Math 203 – p. 3/5
Introduction There are situations where a researchers is interested in comparison of two populations: A sociologist may want to estimate the differences in mean life expectancy between inner-city and suburban residents. A consumer group wants to test whether two major brands of food freezers differ in the average amount of electricity they use. The school board wants to test whether a new method of teaching math. to first year elementary students is better than the current method. Studying the effect of a new treatment on the growth of prostate cancer compared to an existing treatment. Principles of Statistics 1 Lecture 13: Math 203 – p. 3/5

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Introduction As it is seen in the examples, here two: populations, methods, treatments and so on are to be compared. Principles of Statistics 1 Lecture 13: Math 203 – p. 4/5
Introduction As it is seen in the examples, here two: populations, methods, treatments and so on are to be compared. These type of comparison are called two-sample problems, where we are interested in making statistical inference about: Principles of Statistics 1 Lecture 13: Math 203 – p. 4/5

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Introduction As it is seen in the examples, here two: populations, methods, treatments and so on are to be compared.
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