An educator wants to determine whether a new curriculum significantly improves s
ID: 3289370 • Letter: A
Question
An educator wants to determine whether a new curriculum significantly improves standardized test scores for
third grade studentsthird grade students.
She randomly divides
100100
third dash gradersthird-graders
into two groups. Group 1 is taught using the
newnew
curriculum, while group 2 is taught using the
traditionaltraditional
curriculum. At the end of the school year, both groups are given the standardized test and the mean scores are compared. Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative.
Determine whether the sampling is dependent or independent.
A.
This sampling is independent because the individuals selected for one sample do not dictate which individuals are to be in a second sample.
B.
The sampling is dependent because the individuals selected to be in one sample are used to determine the individuals to be in the second sample.
C.
The sampling is independent because the individuals selected to be in one sample are used to determine the individuals to be in the second sample.
D.
The sampling is dependent because the individuals selected for one sample do not dictate which individuals are to be in a second sample.
Indicate whether the response variable is qualitative or quantitative.
A.
The variable is qualitative because it is a numerical measure.
B.
The variable is qualitative because it classifies the individual.
C.
The variable is quantitative because it is a numerical measure.
D.
The variable is quantitative because it classifies the individual.
Explanation / Answer
(a) CORRECT option:
B, The sampling isdependent because the individuals selected to be in one group are used to determine the individuals to be in the second sample.
EXPLANATION: There are only 100 students. If any 50 students are taken as Sample 1, other 50 students automatically become sample 2. So, the samples are dependent.
(b) Correct option:C. The variable is quantitative because it is a numerical value.
EXPLANATION: Here, the variable is mean score, which is a numerical value and thus quantitative.
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