Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?A researcher was interested in the exercise habits of the residents of the village of Pine Heights. She interviewed every 10th person who left the post office until she had interviewed 100 people. Each of the people interviewed was asked to rate their exercise level according to the following scheme "(1) very little, (2) some, (3) moderate, (4) a lot, (5) extensive". The researcher reported that, on average, the residents of Pine Heights exercise moderately.
A. Selection bias
B. Measurement of the variable is not well defined
C. Confounding variables
D. The source of the study
E. Participation bias
Answer: B
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As part of a statistics project, a 6th grade teacher brings to class a container with 300 red marbles and 500 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 40 marbles from the container. Of the 40 marbles drawn, 16 are red.The target population consists of
A. the 40 marbles drawn by the student. B. the 16 marbles drawn by the student. C. the 800 marbles in the container. D. the 300 red marbles in the container. E. none of these
Provide an appropriate response.Solve the system of equations using the addition method: 4x - y = 9 -x + y = -3
A. x = -1, y = 2 B. x = 2, y = -1 C. x = -1, y = -5 D. x = 5, y = 2
According to the text, Louis Vuitton, the world's most profitable luxury brand, has skills that are superior to its competitors in which of the following areas?
A. product design and manufacturing B. distribution and inventory management C. logistics and purchasing D. advertising and retail sales management
Perform the indicated operation.Let A = 
and B = 
. Find 4A + B.
A. 
B. 
C. 
D. 