PT131.S1.Q4 > Analytics

SECTION 1 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23 Question 24 Question 25

SECTION 2 · lr

SECTION 3 · lr

SECTION 4 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8

PASSAGE 2

Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15

PASSAGE 3

Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22

PASSAGE 4

Question 23 Question 24 Question 25 Question 26 Question 27

The advertisement concludes that you should use Dermactin if you need a skin cream. It supports this by saying that dermatologists were consulted during the development of Dermactin and 75% of dermatologists surveyed prefer Dermactin to all other brands.

The advertisement says 75% of surveyed dermatologists prefer Dermactin, but it doesn’t explain the details of the survey. They might have surveyed a small or biased group of dermatologists, which would make the results unreliable. Since the ad doesn’t say how many dermatologists were surveyed or if the survey was random, we can’t be sure that this survey actually supports the advertisement’s conclusion.

The sample may indeed be unrepresentative, but not because it fails to include other types of doctors. The argument is only based on the preferences of dermatologists; other types of doctors are irrelevant.

Because the ad doesn’t say how many dermatologists were surveyed, it’s possible that the sample size was too small. “75% of dermatologists surveyed” could simply mean 3 out of 4 dermatologists surveyed, which would mean the sample was too small and the survey is not reliable.

Even if the ad did assume this, (C) doesn’t describe a flaw in the argument. Surely some dermatologists are less qualified to evaluate skin cream; this doesn’t change the fact that 75% preferred Dermactin.

The ad relies on an appeal to the opinions of dermatologists who do have a special knowledge of skin care. It never mentions the opinions of consumers.

The ad doesn’t overlook this possibility. The conclusion says, “If you need a skin cream, use Dermactin.”

Question

88% of people who answer get this correct

This is a slightly challenging question.

CURVE

Score of students with a 50% chance of getting this right

25% 122

136

75% 151

Question Stem Tags

Flaw or descriptive weakening

Stimulus Tags

Sampling

Popularity Avg. score

161

88%

165

158

159

157

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PrepTest 131 - Section 1 - Question 4

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