# What would the design look like example 4 men and

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that differences in memorization capacity due to age will mask (confound) the differences in the two methods. What would the design look like? Example 4: Men and women experience different physiological differences among diseases. In a study of blood pressure three different methods (a drug, yoga, and meditation) will be tried on both men and women randomly selected from a large company to see which is most effective in reducing high blood pressure. Construct an appropriate design diagram. Would a control group be necessary? Explain. Can this experiment be blinded? What is the parameter of interest in this experiment? What is the population of interest in this problem? Homework: Day 2: pg 371-377 problems 5.45, 48, 50, 52, 54, 56-58

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Chapter 5: Producing Data Chapter 5: Review Objectives: Students will be able to: Summarize the chapter Define the vocabulary used Know and be able to discuss all sectional knowledge objectives Complete all sectional construction objectives Successfully answer any of the review exercises Vocabulary: None new Review Questions: What is one reason for using random allocation to assign units to treatments in an experiment? a. to produce the placebo effect b. to produce experimental groups that are similar c. to eliminate lack of realism. d. to produce the blocks in a block design. 2. What is a specific experimental condition applied to the subjects or units in an experiment called? a. an observation b. the placebo effect c. a treatment d. the control Control groups are used in experiments in order to - - - a. control the effects of extraneous variables on the response b. control the subjects of a study so as to insure all participate equally c. guarantee that someone other than the investigators, who have a vested interest in the outcome, control how the experiment is conducted d. achieve a proper and uniform level of randomization 4. A study was conducted to determine whether a football filled with helium would travel farther when kicked than one filled with air. Though there was a slight difference, it was not statistically significant. What are the treatments? a. the gas (air or helium) with which the football is filled. b. the kickers. c. whether or not the football was kicked. d. the distance that the football traveled. 5. (a) _______________________________ bias occurs when a representative sample is chosen for a survey, but a subset cannot be contacted or does not respond. (b) ________________________________ bias occurs when participants respond differently from how they feel, perhaps because of the way questions are worded or the way the interviewer behaves. 6. A large medical organization with membership consisting of doctors, nurses, and other medical employees wants to know how its members feel about health maintenance organizations (HMOs). Name the type of sampling plan they would use in each of the following scenarios. (a) They randomly sample 500 members from each of the lists of all doctors, all nurses, and all other employees and survey these 1500 members. ________________________________________ (b) They randomly choose a starting point from the first 50 names in an alphabetical list of members, then choose every 50 th member in the list, starting at that point. __________________________________ (c) They select a random sample of hospitals where their members work and survey all members of the organization who work in each hospital. ________________________________________ 7.

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