ECON 2B03 Lecture Notes - Lecture 15: Test Statistic, Decision Rule, Gregor Mendel
25 Apr 2016
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Lecture 14 example (difference between two sample means (known variances)) We want to determine whether first year females are more intelligent that first year males. We need to take samples of first year male and female iq scores. Suppose that we have the following data n1=40, n2=30. Suppose (this is not always the case) that variance are known from past data to be. A random sample of 50 canadian small businesses revealed that the average number of employees was 15. 4. The variance of the number of employees is known from past data to be. Construct a 90% confidence interval for the population mean number of employees. We know that we simply need to calculate. Example (confidence intervals for the population proportion ) In a random sample of 900 students attending canadian universities at 9:30pm on sunday evenings, 300 students had their televisions turned to modern family.
