a. Imagine that you choose one random student from the classroom (perhaps by using a random number table). What is the probability that the student will be a junior? b. What is the probability that the student will be a freshman? c. If you are asked to select a proportionate stratified sample of size 30 from the classroom, stratified by class level (senior, junior, etc.), how many students from each will there be in the sample? group

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.CR: Chapter Review
Problem 5CC: a What is meant by an experiment? Sample space? b What is an event? c Define the probability of an...
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C4. An upper-level sociology class has 120 registered students: 34 seniors, 57 juniors, 22
sophomores, and 7 freshmen.
a. Imagine that you choose one random student from the classroom (perhaps by
using a random number table). What is the probability that the student will be a
junior?
b. What is the probability that the student will be a freshman?
c. If you are asked to select a proportionate stratified sample of size 30 from the
classroom, stratified by class level (senior, junior, etc.), how many students from each
group will there be in the sample?
d. If instead are to select a disproportionate sample of size 20 from the classroom,
with equal numbers of students from each class level in the sample, how many
freshmen will there be in the sample?
you
the
Transcribed Image Text:C4. An upper-level sociology class has 120 registered students: 34 seniors, 57 juniors, 22 sophomores, and 7 freshmen. a. Imagine that you choose one random student from the classroom (perhaps by using a random number table). What is the probability that the student will be a junior? b. What is the probability that the student will be a freshman? c. If you are asked to select a proportionate stratified sample of size 30 from the classroom, stratified by class level (senior, junior, etc.), how many students from each group will there be in the sample? d. If instead are to select a disproportionate sample of size 20 from the classroom, with equal numbers of students from each class level in the sample, how many freshmen will there be in the sample? you the
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