Questions: A study examined whether the content of TV shows influenced the ability of viewers to recall brand names of items featured in the commercials. Analysts recorded the number of advertised brand names a group of people recalled immediately after watching TV shows and then that same group of people recalled 24 hours later. Strangely enough, it appears that they remembered more about the ads the next day. Should we conclude this is true in general about people's memory of TV ads? Complete parts a through d. c) How might the design of this experiment have tainted these results? A. Since the populations of each group are not normally distributed, subjects with high recall could skew the means for each group. B. Since the populations of each group are not normally distributed, a two-sample t-test is not appropriate to compare the means between the two groups. C. Since the subjects were not selected at random, the first interview might have helped the subjects with high recall to remember the brand names for a longer period of time than they would have otherwise. D. A subject with high recall right after the show might have high recall 24 hours later as well. Also, the first interview might have helped the subjects to remember the brand names for a longer period of time than they would have otherwise. d) Suggest a design that could compare immediate brand name recall with recall one day later. A. Randomly assign half of the group watching violent TV shows to be interviewed immediately after watching, while the other half of the group is interviewed 24 hours later. B. Assign the older half of the group watching violent TV shows to be interviewed immediately after watching, while the younger half of the group is interviewed 24 hours later. C. Assign subjects in the group with horrible short-term memory to be interviewed immediately after watching the violent TV show, and assign subjects with horrible long-term memory to be interviewed 24 hours later. D. Assign subjects in the group with good short-term memory to be interviewed immediately after watching the violent TV show, and assign subjects with good long-term memory to be interviewed 24 hours later.

A study examined whether the content of TV shows influenced the ability of viewers to recall brand names of items featured in the commercials. Analysts recorded the number of advertised brand names a group of people recalled immediately after watching TV shows and then that same group of people recalled 24 hours later. Strangely enough, it appears that they remembered more about the ads the next day. Should we conclude this is true in general about people's memory of TV ads? Complete parts a through d. c) How might the design of this experiment have tainted these results? A. Since the populations of each group are not normally distributed, subjects with high recall could skew the means for each group. B. Since the populations of each group are not normally distributed, a two-sample t-test is not appropriate to compare the means between the two groups. C. Since the subjects were not selected at random, the first interview might have helped the subjects with high recall to remember the brand names for a longer period of time than they would have otherwise. D. A subject with high recall right after the show might have high recall 24 hours later as well. Also, the first interview might have helped the subjects to remember the brand names for a longer period of time than they would have otherwise. d) Suggest a design that could compare immediate brand name recall with recall one day later. A. Randomly assign half of the group watching violent TV shows to be interviewed immediately after watching, while the other half of the group is interviewed 24 hours later. B. Assign the older half of the group watching violent TV shows to be interviewed immediately after watching, while the younger half of the group is interviewed 24 hours later. C. Assign subjects in the group with horrible short-term memory to be interviewed immediately after watching the violent TV show, and assign subjects with horrible long-term memory to be interviewed 24 hours later. D. Assign subjects in the group with good short-term memory to be interviewed immediately after watching the violent TV show, and assign subjects with good long-term memory to be interviewed 24 hours later.
Transcript text: A study examined whether the content of TV shows influenced the ability of viewers to recall brand names of items featured in the commercials. Analysts recorded the number of advertised brand names a group of people recalled immediately after watching TV shows and then that same group of people recalled 24 hours later. Strangely enough, it appears that they remembered more about the ads the next day. Should we conclude this is true in general about people's memory of TV ads? Complete parts a through d. c) How might the design of this experiment have tainted these results? A. Since the populations of each group are not normally distributed, subjects with high recall could skew the means for each group. B. Since the populations of each group are not normally distributed, a two-sample t-test is not appropriate to compare the means between the two groups. C. Since the subjects were not selected at random, the first interview might have helped the subjects with high recall to remember the brand names for a longer period of time than they would have otherwise. D. A subject with high recall right after the show might have high recall 24 hours later as well. Also, the first interview might have helped the subjects to remember the brand names for a longer period of time than they would have otherwise. d) Suggest a design that could compare immediate brand name recall with recall one day later. A. Randomly assign half of the group watching violent TV shows to be interviewed immediately after watching, while the other half of the group is interviewed 24 hours later. B. Assign the older half of the group watching violent TV shows to be interviewed immediately after watching, while the younger half of the group is interviewed 24 hours later. C. Assign subjects in the group with horrible short-term memory to be interviewed immediately after watching the violent TV show, and assign subjects with horrible long-term memory to be interviewed 24 hours later. D. Assign subjects in the group with good short-term memory to be interviewed immediately after watching the violent TV show, and assign subjects with good long-term memory to be interviewed 24 hours later.
failed

Solution

failed
failed

c) How might the design of this experiment have tainted these results?

The answer is D: A subject with high recall right after the show might have high recall 24 hours later as well. Also, the first interview might have helped the subjects to remember the brand names for a longer period of time than they would have otherwise.

Explanation:

  • Option A is incorrect because while subjects with high recall could skew the means, the main issue here is the potential influence of the first interview on recall.
  • Option B is incorrect because the appropriateness of a two-sample t-test is not directly related to the design flaw in question.
  • Option C is partially correct in suggesting that the first interview might have influenced recall, but it does not address the potential for subjects with high recall to maintain that recall over time.
  • Option D is correct because it acknowledges both the potential for subjects with high recall to maintain that recall and the influence of the first interview on memory retention.

d) Suggest a design that could compare immediate brand name recall with recall one day later.

The answer is A: Randomly assign half of the group watching violent TV shows to be interviewed immediately after watching, while the other half of the group is interviewed 24 hours later.

Explanation:

  • Option A is correct because it uses random assignment to control for potential biases and ensures that the two groups are comparable, which is a fundamental principle of experimental design.
  • Option B is incorrect because it introduces a confounding variable (age) that could affect recall, making it difficult to attribute differences in recall to the timing of the interview.
  • Option C is incorrect because it does not use random assignment and instead relies on subjective assessments of memory ability, which could introduce bias.
  • Option D is incorrect for similar reasons as C, as it does not use random assignment and could introduce bias based on subjective assessments of memory ability.
Was this solution helpful?
failed
Unhelpful
failed
Helpful

Questions asked by other users

failedAnswered
Solve this triangle A = (Round to one decimal place as needed.) Triangle ABC B = 5 C = 7 A = 10
failedAnswered
Find the slope and y-intercept for the following equation by writing it in the form y=mx+b. Then graph the equation. -4x+3y=12
failedAnswered
Graph the line. y = 1/2 x + 5
failedAnswered
Question 5 of 10 Lines that are not in the same plane are called lines. A. skew B. perpendicular C. parallel D. transversal
failedAnswered
Quiz #1 Question 2 of 12 This quiz: 12 point(s) possible This question: 1 point(s) possible Submit quiz A researcher wants to assess the effects of taking prenatal vitamins on the health of newborns, using the newborn weight as the response variable. Explain why it might be inappropriate to use a designed experiment to address this research objective. Choose the correct answer below. A. A designed experiment would be retrospective and would require that women remember and truthfully report whether or not they took prenatal vitamins. B. A designed experiment would suffer more than an observational study from the effects of confounding and lurking variables. C. A designed experiment would not allow the researcher to claim causation, only association, between prenatal vitamins and newborn health. D. Since there is a perceived benefit to taking prenatal vitamins, there would be ethical issues in intentionally denying them to some pregnant women.