This chart shows the number of students of different age groups who participated in a quiz.
Which of the following statements about the stack plot is true?
There were more male students in the age group 19-21 than in t
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This chart shows the number of students of different age groups who participated in a quiz.
Which of the following statements about the stack plot is true?
There were more male students in the age group 19-21 than in the age group 15-17.
There were more male students than female students in the age group 19-21.There were more female students in the age group 17-19 than in any other age group.
There were more students in the age group 15-17 than in any other age group.
RATIONALE
If we note that the greatest area for the girls is the longest darker region, this occurs in the age group 17-19.
CONCEPT
Stack Plots
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2
Jay wants to study nutrition and performance in schools using available data.
Which of the scenarios below will provide Jay with available data?
Going to a local high school and asking the principal for information about students' previous grades, then
interviewing a random selection of students about their eating habits.
Going to a local high school and asking the principal for information about students' current and previous
grades, then interviewing a random selection of students about their eating habits.
Going to a local high school and asking the principal for information about students' current and previous
grades, then asking the health teacher for the results from a survey students took in health class.
Going to a local college and asking current undergraduates to report their grades and eating habits from
high school.
RATIONALE
Recall, for data to be considered available data it must already be collected. Since the grades data and survey
data were already collected these are examples of available data.
CONCEPT
Data
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3Regan wants to study how reading on a computer affects comprehension among elementary school students.
Regan thinks that girls and boys might differ and he also suspects that grade level will affect the results. He
decides to create a male and a female group for each grade. Within each group, he randomly assigns half of the
students to read an article on paper and half of the students to read the article on a computer.
Which type of experimental design does this situation illustrate?
Completely Randomized
Randomized Block
Double-Blind
Matched-Pair
RATIONALE
Since students are put into gender and grade blocks and are then assigned treatment or control randomly this is
called a randomized block design.
CONCEPT
Randomized Block Design
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4
Select the correct statement regarding experiments
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