Question

After reviewing data from a sample, an inference can be made about the population. For example, Find a data set on the internet. Some suggested search terms: Free Data Sets, Medical Data Sets, Education Data Sets. Introduce your Data Set and Cite the Source. What trends do you notice in your data set? Based on the trends and the history of your data set, make a claim. What kind of test (left, right, two tailed) would you have to complete? Explain the steps needed to complete the Hypothesis Test. What is needed?

Answer 1

Suppose we are studying the waiting time for a bus at a bus stop. If we want to rest the claim that mean waiting time is less than 5 minutes

Then following test is used

We have observed a sample of 20 observations ( waiting time ) with sample mean 3.7 and sample standard deviation 2.1

We will use t test to compare mean ( not z test because number of observations are less than 30 )

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