23.1 How Hypothesis Tests Are Reported in the News 1. Determine the null hypothesis and the alternative hypothesis. 2. Collect and summarize the data into a test statistic. 3. Use the test …

HYPOTHESIS TESTING STEP 2: SET CRITERIA FOR DECISION Alpha Level/Level of Significance probability value used to define the (unlikely) sample outcomes if the null …

Example 7.2.1 Page 223 Researchers are interested in the mean age of a certain population. A random sample of 10 individuals drawn from the population of interest has a mean of 27. …

The test statistic is a one-number summary of all the information in the sample regarding the correctness of the alternative hypothesis. Different kinds of hypothesis tests (e.g., about …

Hypothesis Testing • Is also called significance testing • Tests a claim about a parameter using evidence (data in a sample ... Another example: IQ testing • Let X represent Weschler Adult …

hypothesis if the computed test statistic is less than -1.96 or more than 1.96 P(Z # a) = α, i.e., F(a) = α for a one-tailed alternative that involves a < sign. Note that a is a negative number. H0: p = …

Hypothesis Testing Steps Objectives In this chapter, you learn: (Slide 9) The basic principles of hypothesis testing How to use hypothesis testing to test a mean or proportion The …

no reason to doubt that the null hypothesis is true. Similarly, if the observed data is “inconsistent” with the null hypothesis (in our example, this means that the sam-ple mean falls outside the …

I Understanding a pdf is all we need to understand hypothesis testing I Pdfs are more intuitive with continuous random variables instead of discrete ones (as from example 1 and 2 above). Let’s …

Example 4.2 A coin is tossed and we hypothesise that it is fair. Hence 1 0 is the set 2 containing just one element of the parameter space = [0 ;1]: As a convention we shall denote the …