Question 1 A statistics instructor likes to assign the material as reading in th

Question

Question 1 A statistics instructor likes to assign the material as reading in the textbook and then give a pretest Select one anwer. before covering the material in class to discover which topics the students did not master from the so points reading. About an equal number of students mastered "most," "some," or almost none" of the material from reading the textbook based on the pretest results. Then the instructor covers the material in class and assigns homework for the students to practice what they have learned. After the students complete the homework, they work with each other and the teacher irn class on the problems they did not understand. Finally, after all 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 smaller standard deviation? A. O The student's scores on the pretest. B. The student's scores on the posttest. C. O We expect the standard deviations to be about the same. Question 2 guessing on the exam, so for each question the student earns 1 point for a correct answer, o points for no io points answer. Consequently, if a student answered every question i the student would earn a score of -20 on the exam. However, if a student answered every question correctly, the student would earn a score of 20 on the exam. After the exam, the teacher distributes the list of test scores and asks the class to calculate the standard deviation. The first student to finish the calculations says that the standard deviation is-1.8. c. O Most students scored below the mean. Question 3

Explanation / Answer

(1) Option B - The student's scores on the posttest.

(2) Option A - The standard deviation was calculated incorrectly. (because it can't be negative)

(3) Option C - The standard deviation will decrease, because this change moved a data point closer to the mean.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.