Question: 4-The statistics for a recent exam are shown below. = 80 pts S = 4 pts a) If the grade distribution follows a normal curve,

4-The statistics for a recent exam are shown below. = 80 pts S = 4 pts a) If the grade distribution follows a normal curve, then about what {Percentage of students scored > ( - 1S)}? (10 pts) b) Again, if the data follows a normal distribution, about what {Percentage of students scored < (+ 2S)}? (10 pts) c) Suppose in a different test results, the median was 65 points with a mean of 82 points and a standard deviation of 4 points. If 100 students took the test, what was the minimum number of students that scored within plus or minus 2 standard deviations from the mean? (10 pts)

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

1) The average score of a statistics class was 71 with a standard deviation of 10. What is the z score of a student with a grade of 68? (2.5 pts) What is the z score of a student with a grade of 80?...

Problems need to include all required steps and answer(s) for full credit. All answers need to be reduced to lowest terms where possible. If the answer is in %, show two decimal places. Answer the...

Possible Multiple Choice Questions for the Exam. Focus on the topics discussed in class. Chapter 1 Multiple Choice Identify the choice that best completes the statement or answers the question. ____...

STAT 200: Introduction to Statistics Final Examination, Spring 2017 OL1/US1 Page 1 of 8 STAT 200 OL1/US1 Sections Final Exam Spring 2017 The final exam will be posted at 12:01 am on March 3, and it...

1. True or False. Justify for full credit. (15 pts) (a) If the variance of a data set is zero, then all the observations in this data set are zero. (b) If P(A) = 0.4 , P(B) = 0.5, and A and B are...

STAT 200: Introduction to Statistics Final Examination, Summer 2016 OL1 Page 1 of 7 STAT 200 OL1/US1 Sections Final Exam Summer 2016 The final exam will be posted at 12:01 am on July 8, and it is due...

STAT 200 Final Examination Summer 2016 OL1/US1 Page 1 of 9 STAT 200 Introduction to Statistics Name______________________________ Final Examination: Summer 2016 OL1/US1 Instructor...

STATISTICS FOR DECISION MAKING Dr. Azar Abizada HOMEWORK 4 Due Date: Wednesday, March 11th class time Problem 1 (26 points): Be careful, each part of this question is independent of one another. a)...

Vargas Corporation is authorized to issue 20,000 shares of $50 par value, 10% preferred stock and 125,000 shares of $3 par value common stock . On January 1, 2010, the ledger contained the following...

Consider carefully the interplay of chance events and partial information in each of the games in Exercise 6.10. a. For which is the standard expectiminimax model appropriate? Implement the algorithm...

E ( 1 ) n = A * E ( m ) n = n 2 * m 2 1 , 2 cov ( A , B ) = n * 0 * n 2 C o r r d c o d d ( A , B ) * c o v ( , Q ) A * Following a successful presentation at Expo 2 0 2 2 , PWC Advisory section...

1. During Year 1, Knight Company recorded the following information on its Income Statement: Sales revenue: $500,000 Interest expense: $10,000 Interest income: $15,000 Gross Profit $200,000 Selling...