5. Decide which method of data collection you would use to gather data for each

Question

5. Decide which method of data collection you would use to gather data for each study. Explain your reasoning. (a) A study on the effect of low dictary intake of vitamin C and iron on lcad levels in adults (b) The ages of people living within 500 miles of your home 6. An experiment is being performed to test the effects of a new drug on high blood pressure. The experimenter identifies 320 people ages 35-50 years old with high blood pressure for participation in the experiment. The subjects arc divided into equal groups according to age. Within cach group, subjects arc then randomly selccted to be in cither the treatment group or the control group. What type of cxperimental design is being used for this experiment? 7. Identify the sampling technique used in each study. Explain your reasoning. (a) A journalist goes to a campground to ask people how they feel about air (b) For quality assurance, every tenth machine part is selected from an (c) A study on attitudes about smoking is conducted at a college. The students pollution assembly line and measured for accuracy are divided by class (freshman, sophomore, junior, and senior). Then a random sample is selected from each class and interviewed. 8. Which sampling technique used in Exercise 7 could lead to a biased study?

Explanation / Answer

a) Observation study: Observation method is a method under which data from the field is collected with the help of observation by the observer or by personally going to the field.

So, the given is observation study

b) Interview study : This method of collecting data involves presentation or oral-verbal stimuli and reply in terms of oral-verbal responses

So, given is interview study

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