1) Recent budget cuts forced the city school district to increase class size in the elementary schools. To determine student reaction to the change, the district administered a survey to students asking whether the larger classes were “better, worse, or not different” from the classes the previous year. The results from the survey will be used to describe the students’ attitude. 2) To examine the relationship between alcohol consumption and birth weight, a researcher selects a sample of n = 20 pregnant rats and mixes alcohol with their food for 2 weeks before the pups are born. One newborn pup is randomly selected from each subject’s litter and the average birth weight for the n = 20 pups is recorded. It is known that the average birth weight for regular rats (without exposure to alcohol) is m = 5.6 grams.
Each problem describes a research situation and the data it produces. Identify the statistical procedure or test that is appropriate for the data.
Choose whether the problem requires one of the following: Descriptive statistics (Mean, Standard Deviations, Percentiles), one-sample t-test, Independent-measures t-test, Independent-measures ANOVAs (One-factor or Two-factor), Repeated-measures ANOVA, Linear Regression, Chi-Square Goodness-of-fit, Chi-Square Test of independence.
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1) Recent budget cuts forced the city school district to increase class size in the elementary schools. To determine student reaction to the change, the district administered a survey to students asking whether the larger classes were “better, worse, or not different” from the classes the previous year. The results from the survey will be used to describe the students’ attitude. |
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2) To examine the relationship between alcohol consumption and birth weight, a researcher selects a sample of n = 20 pregnant rats and mixes alcohol with their food for 2 weeks before the pups are born. One newborn pup is randomly selected from each subject’s litter and the average birth weight for the n = 20 pups is recorded. It is known that the average birth weight for regular rats (without exposure to alcohol) is m = 5.6 grams. |
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