11:25 4 Search Hypothesis Test HW PSVZSIO, Statistical Methods of Psychology, Fall 2021 Homework. Chapter 8, Introduction to Hypothesis Testing Note: This homework is worth 10 points! Take your time. be careful. and follow all of the instructions. Don't forget to start with the formula for each calculation. Plug values into the formula, then solve for those values. I]. A standardized reading comprehension test has scores that are normally distributed with ,u = 20 and cr = 6. A researcher wants to nd out whether a new training method for reading comprehension will result in a change of scores for individuals in a population She selects 16 participants who participate in the new training method. They are given the standardized reading comprehension test, and the mean score for the sample is 23. Can the researcher oonclude that the training has had any effect? Use an a = 0.05. 'I'hecorred answer I: that she can conclude there Is an effect. You w'll need toexplain wiry using the values you have looked In and the values you have calculated. Note: The question is about whether the training has had meect. This could mean W W scores. This should tell you which type of test to perform {one or two-tailed]. l2 IQ tests are standardized to have a u = 100 and a = 15. A researcher wants to test whether a new drug will make people more intelligent. He selects a sample of 9 participants and administers the drug. He then gives the participants and IQ test. and finds a mean for the sample ol103. Can the researcher conclude the dug had any effect? Use an a = 0.05. 'l'hecorred answer isthat he motoondudethere Ban elfecl. You wll mdtoeaplaln wiry usingttle valuesypullaue lpokedwandthe nllresynuhauecalcula'ted. Note: The question is about whether the dnJginueasedthe scores. This should tell you which type of test to perform. its usual, start all calculations with the appropriate equation. and solve from there by substituting the values. In case you are wondering, the solutions do not require a table of any kind. Take a look at the demonstration [8.1] at the end of the chapter lor an example of a step by step solution to problems of this type