A statistics class has 50 females and 50 males. A researcher randomly selects a sample that has 80 males and 20 females. Why should the researcher be cautious of making inferences about the entire class based on the sample?
a. Because, by luck of the draw, the sample is unrepresentative of the population.
b. Because, by luck of the draw, the sample is representative of the population.
c. Because, by luck of the draw, the opinions of the females in the sample will not be the same as those of the females in the population.
d. Because, by luck of the draw, the sample was too small.
Question 2
When a sample does not represent the population, any evidence obtained from that sample regarding a law of nature is
a. possibly representative of the population. c. descriptive.
b. used to draw inferences. d. misleading.
first day of my chemistry class.. this is what the teacher had to say
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