E. For each study below, indicate if you should use paired t-procedures or 2-Sample t-procedures The following table gives the percent of fat found in 5 randomly selected containers of each of two...

Extracted text: E. For each study below, indicate if you should use paired t-procedures or 2-Sample t-procedures The following table gives the percent of fat found in 5 randomly selected containers of each of two brands of ice cream. Brand A 5.7 4.5 6.2 6.3 7.3 Brand B 6.3 5.7 5.9 6.4 5.1 We want to estimate the difference in mean fat content between the two brands. Circle one: PAIRED T-PROCEDURES 2 SAMPLE T-PROCEDURES Popular wisdom is that eating presweetened cereal tends to increase the number of dental caries (cavities) in children. A sample of children was (with parental consent) entered into a study and followed for several years. Each child was classified as a sweetened-cereal lover or an unsweetened-cereal lover. At the end of the study, the amount of tooth damage was measured. Circle one: PAIRED T-PROCEDURES 2 SAMPLE T-PROCEDURES An advertising firm is comparing two different 30-second television ads for a new mobile phone. A group of 48 volunteers is divided randomly into two groups of 24, and each group watches one of the ads. Afterwards, all the subjects are asked to estimate, on a scale of 1 (no way) to 10 (definitely), whether they would consider buying this phone the next time they upgrade to a new phone. Circle one: PAIRED T-PROCEDURES 2 SAMPLE T-PROCEDURES A physician who has delivered babies for over 20 years claims that babies tend to weigh more at birth than their next older sibling. To verify the doctor's statement, her office assistant takes a random sample of 15 mothers with at least two children (from the hospital records) and records the birthweights of the first two children (in pounds). Circle one: PAIRED T-PROCEDURES 2 SAMPLE T-PROCEDURES The infamous psychologist, Dr. Visegrips, claims that his searet sleep tapes cause people to become better at basic algebra "All you have to do," the doctor explains, "is listen to my tapes while you sleep at night, and you'll be better at algebra in two months". A math teacher at a local high school has expressed interest but demands evidence. Five people are randomly selected from students at the school. They take an algebra skills test, listen to Dr. Visegrips' tape for two months while they sleep, and then take a second test. The test scores are as follows: Test scores A B. D. Pretest Posttest 69 68 89 72 89 52 Circle one: PAIRED T-PROCEDURES 2 SAMPLE T-PROCEDURES JO