29. Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequentlyused to measure motivations and attitudes. A Likert scale is a:A. Discrete variableB. Ordinal variable.C. Categorical variableD. All of the options30. A randomized experiment was done by randomly assigning each participant either to walk for halfan hour three times a week or to sit quietly reading a book for half an hour three times a week. At theend of a year the change in participants' blood pressure over the year was measured, and the changewas compared for the two groups. "This is a randomized experiment rather than an observationalstudy because: *A. Blood pressure was measured at the beginning and end of the study.B. A random sample of participants was used.C. The participants were randomly assigned to either walk or rea, rather than choosing their ownactivity.D. The two groups were compared at the end of the study.E. Other31. A researcher is interested in the travel time of Utrecht University students to college. A group of50 students is interviewed. Their mean travel time in 16.7 minutes. For this study the mean of 16.7minutes is an example of a(n) *A. parameterB. statisticC. populationD. sample32. A population has a mu = 50 and sigma = 10 If these scores are transformed into z scores, thepopulation of z-scores will have a mean and standard deviation of:A. µ = 50 and sigma = 1.96B. µ = 1 and sigma = 0C.H = 50 and sigma = 10D. µ = 0 and sigma = 133. A study was done to compare the lung capacity of coal miners to the lung capacity of farmworkers. The researcher studied 200 workers of each type. Other factors that might affect lungcapacity are smoking habits and exercise habits. The smoking habits of the two worker types aresimilar, but the coal miners generally exercise less than the farm workers. Which of the following is aconfounding variable in this study? *A. ExerciseB. Smoking or notC. Lung capacityD. Occupation

Question

29. Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequentlyused to measure motivations and attitudes. A Likert scale is a:A. Discrete variableB. Ordinal variable.C. Categorical variableD. All of the options30. A randomized experiment was done by randomly assigning each participant either to walk for halfan hour three times a week or to sit quietly reading a book for half an hour three times a week. At theend of a year the change in participants' blood pressure over the year was measured, and the changewas compared for the two groups. &#34;This is a randomized experiment rather than an observationalstudy because: *A. Blood pressure was measured at the beginning and end of the study.B. A random sample of participants was used.C. The participants were randomly assigned to either walk or rea, rather than choosing their ownactivity.D. The two groups were compared at the end of the study.E. Other31. A researcher is interested in the travel time of Utrecht University students to college. A group of50 students is interviewed. Their mean travel time in 16.7 minutes. For this study the mean of 16.7minutes is an example of a(n) *A. parameterB. statisticC. populationD. sample32. A population has a mu = 50 and sigma = 10 If these scores are transformed into z scores, thepopulation of z-scores will have a mean and standard deviation of:A. µ = 50 and sigma = 1.96B. µ = 1 and sigma = 0C.H = 50 and sigma = 10D. µ = 0 and sigma = 133. A study was done to compare the lung capacity of coal miners to the lung capacity of farmworkers. The researcher studied 200 workers of each type. Other factors that might affect lungcapacity are smoking habits and exercise habits. The smoking habits of the two worker types aresimilar, but the coal miners generally exercise less than the farm workers. Which of the following is aconfounding variable in this study? *A. ExerciseB. Smoking or notC. Lung capacityD. Occupation

Accepted Answer

We have given five  Points ( strongly disagree, disagree, neutral, agree, strongly agree) are…

29. Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequently used to measure motivations and attitudes. A Likert scale is a: A. Discrete variable B. Ordinal variable. C. Categorical variable D. All of the options