Data Graphically and Numerically Progress You are on 11 of 12 Choose the BEST an
ID: 2922964 • Letter: D
Question
Data Graphically and Numerically Progress You are on 11 of 12 Choose the BEST answer A statistics instructor likes to assign the material as reading in the textbook and then give a pretest before covering the material n cas to the textbook based on the pretest results. Then dscover which topics the students did not master from the reading, About an equal number of students mastered "most "some oar almost none' of the materialfrom reading the instructor covers the material in class and assigns homework for the students to practice what they have the students complete the homework they work with each other and the teacher in clas on the problems they lid not understand Finaly after al students have mastered most of the material, she gives the same exam as a posttest. Which one of the following data sets would you expect to have the smaliler standard deviation? O The student's scores on the postest O The student's scores on the pretest Next > WW7SY240PHLO03Explanation / Answer
assuming that the students learn after the pretest , the standard deviation (or the spread of the marks) in the post test would be less.
When students were not taoght the subject , based on reading they would have scored varied scores that would have a wider range.
when the students are taught the subject and practice again , they would all score better marks that would have a less range as the lowest score of the students would go up. Hence Standard deviation of the post test would be less
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