Section 4.1: Introducing Hypothesis Tests

To do at home:

1)  Go to the book, section 4.1 (p. 221) or the power point presentation for section 4.1, and complete the following:

  1. A statistical test uses
  1. What is the null hypothesis?
  1. What is the alternative hypothesis?
  1. Circle the correct choice - Hypotheses are written using the symbols of

Population parameters sample statistics symbols

2)  There are three videos in the WILEY PLUS HOMEWORK – In one of them they tell you about

“What you need to remember when you are asked to specify hypothesis?”

Take notes here of that portion of the video – give a “bulleted” list of what you need to remember:

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3)  Circle the correct choice of hypotheses in each of the problems below:

4)  Statistical Significance - Go to the book section 4.1 (p. 226) or the power point presentation for section 4.1, and complete the following: What does it mean statistically significant? Circle all the correct choices below:

  1. We have convincing evidence in favor or Ho and against Ha
  2. We have convincing evidence against Ho and in favor of Ha
  3. When results as extreme as the ones observed are unlikely to happen by random chance alone (assuming Ho is true)
  4. When results as extreme as the ones observed are likely to happen by random chance alone (assuming Ho is true)

5)  Statistical Significance for Sleep vs Caffeine for Memory

If the results of the test comparing sleep and caffeine for memory recall are statistically significant, what does that mean in terms of sleep, caffeine, and memory? Select one of the following:

a)  We can’t tell whether there is a difference in the mean number of words recalled by each group

b)  There is evidence to say that there is a difference in the mean number of words recalled by each group

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