Asked by sam
A science teacher gives a test with 15 questions. This teacher is a hard grader.
The teacher assigns points in the following manner: a correct answer = +1 point, an incorrect answer = -1 point, no answer = 0 points.
So scores on the test could range from +15 to -15. The teacher’s assistant calculates the standard deviation for scores on the test and reports SD = -2.3.
What do we know?
a. The standard deviation was calculated incorrectly.
b. Most students received negative scores.
c. Most students scored below the mean.
d. There is an outlier that has a negative value close to -15.
The teacher assigns points in the following manner: a correct answer = +1 point, an incorrect answer = -1 point, no answer = 0 points.
So scores on the test could range from +15 to -15. The teacher’s assistant calculates the standard deviation for scores on the test and reports SD = -2.3.
What do we know?
a. The standard deviation was calculated incorrectly.
b. Most students received negative scores.
c. Most students scored below the mean.
d. There is an outlier that has a negative value close to -15.
Answers
Answered by
Steve
dfssdf
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.