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At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 79 and a standard deviation of 15. The scores on the calculus final are also approximately normally distributed, with a mean of 79 and a standard deviation of 12. A student scored 80 on the chemistry final and 82 on the calculus final. Relative to the students in each respective class, in which subject did the student do better?
a) There is no basis for comparison
b) The student did equally well in each course
e) None of the above
A grading scale is set up for 1000 students test scores. It is assumed that the scores are normally distributed with a mean score of 75 and a standard deviation of 15. What is the probability a student will have a score between 45 and 75
Module 4 Minitab AssignmentInstructions:
Below you will find questions. Please use the provided data to complete the tasks and to answer the questions.For the standard normal distribution, Z, find the proportion (percentage) of observations that satisfies each of the following statements. In each case, use a graph of the Normal curve and shade the area under the curve that is the answer to the question.
Values of z larger than 2.33.
Between z = −1.50 and z = 1.18.
Values of z less than 1.19.
A set of final examination grades in an introductory statistics course was found to be normally distributed with a mean of 77 and a standard deviation of 8. For each of the following produce a normal distribution plot showing the appropriate shaded area.
What percentage of students scored lower than 70 on this exam?
What percentage of students scored between 81 and 89?
What percentage of students scored higher than 90 on this exam?
What is the 80th percentile of scores?
What is the 95th percentile of scores?