Can someone solve this step-by-step? I do not know how to do this problem. Here
ID: 3302353 • Letter: C
Question
Can someone solve this step-by-step? I do not know how to do this problem.
Here are the total scores of 10 students in an introductory statistics course. 62 93 54 76 73 98 64 55 80 71 Previous experience with this course suggests that these scores should come from a distribution that is approximately Normal with mean 72 and standard deviation 10. The grading policy says that the cutoffs for the other grades correspond to the following: bottom 5% receive F, next 10% receive D, next 40% receive C, and next 25% receive B. These cutoffs are based on the N(72, 10) distribution. (a) Give the cutoffs for the grades in this course in terms of standardized scores. (Round your answers to two decimal places.) Letter Grade Standardized Cutoff (b) Give the cutoffs in terms of actual total scores. (Round your answers to the nearest whole number.) 0 to to c) Do you think that this method of assigning grades is a good one? Give reasons for your answer.Explanation / Answer
from normal value table:
b)
below are the cutoff score
c)
Yes; as according to above method the people who are very poor in their study will get lowest grade while who are outstanding will get best grade. The students who are average will get middle grades.
F z< -1.64 D -1.64 <z< -1.04 C -1.04 <z< 0.13 B 0.13 <z< 0.84