Discrete MathWorksheet 13.1 – 13.4
Name______Date______Pd ______
SHOW ALL WORK.
Amath teacher brings to class a container with 450 teal marbles and 150silver marbles which are thoroughly mixed. To figure out how many teal marbles are in the container without actually counting them all, a student randomly draws 150 marbles from the container. Of the 150 marbles drawn, 35 are silver.
1.) The data collection method can best be described as
2.) The sampling frame consists of
3.) The N-value for this population is
4.) The sample consists of
5.) The sampling rate is
6.) Suppose that the studentsare given the N-value. What is a reasonable estimate for the
number of silver marbles in the container?
7.) Suppose that the students are given the N-value. What is a reasonable estimate for the number of teal marbles in the container?
8.) The sampling error for the teal marbles is
9.) The sampling method used is called
In order to determine how American undergraduate college students feel about eliminating spring break in order to finish spring term a week early, a survey was conducted. 500 undergraduate students from the University of Miami (FL) were interviewed. Each of the 5 interviewers hired to conduct the survey were told to interview 25 freshmen, 25 sophomores, 25 juniors, and 25 seniors. Of the 500 students interviewed, 23% were in favor of the elimination of spring break, 75% were opposed, and 2% had no opinion.
10.) The target population for this survey is
A) the students that were interviewed.
B) the students that had an opinion.
C) all undergraduates at the University of Miami.
D) all American undergraduate college students.
11.) The sampling frame for this survey
A) is smaller than the target population.
B) is the same as the target population.
C) is larger than the target population.
D) does not overlap the target population.
12.) The sample for this survey is
A) all undergraduates at the University of Miami.
B) all American undergraduate college students.
C) the students that were interviewed.
D) the students that had an opinion.
13.) Based on the fact that 23% of the students interviewed were in favor of the elimination of spring break, the value 23% is
A) a statistic.
B) a population.
C) a parameter.
D) a sample.
14.) The results of this survey are unreliable primarily because of
A) selection bias only.
B) non-response bias only.
C) both selection bias and non-response bias.
D) the absence of a control group.
15.) The sampling method used for the survey is called
A) simple random sampling.
B) quota sampling.
C) stratified sampling.
D) random sampling.
E:\Discrete Math\Ch13\Quiz 13-1 to 13-4 alt.doc