Homework Help is Here – Start Your Trial Now!
Math
Statistics
student of the ninth grade with a total s, scored 75 in an exam in which the m E all students was 70 and standard dev cores was 2. Bob, a student of the tent ith a total of 50 students, scored 72 in

student of the ninth grade with a total s, scored 75 in an exam in which the m E all students was 70 and standard dev cores was 2. Bob, a student of the tent ith a total of 50 students, scored 72 in

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
explain simply
John, a student of the ninth grade with a total of 50 students, scored 75 in an exam in which the mean score of all students was 70 and standard deviation of the scores was 2. Bob, a student of the tenth grade with a total of 50 students, scored 72 in an exam in which the mean score of all students was 65 and standard deviation of the scores was 3. Which of the following statements must be correct? I. II. III. (A) (B) (C) (D) (E) John ranks higher in his class than Bob does in his class. There was at least one student who scored more than John. There was at least one student who scored less than Bob. Only I Only II Only III Only I and III Only II and III
Transcribed Image Text:John, a student of the ninth grade with a total of 50 students, scored 75 in an exam in which the mean score of all students was 70 and standard deviation of the scores was 2. Bob, a student of the tenth grade with a total of 50 students, scored 72 in an exam in which the mean score of all students was 65 and standard deviation of the scores was 3. Which of the following statements must be correct? I. II. III. (A) (B) (C) (D) (E) John ranks higher in his class than Bob does in his class. There was at least one student who scored more than John. There was at least one student who scored less than Bob. Only I Only II Only III Only I and III Only II and III
Expert Solution
Step 1

Given:

John

Raw score (x1) = 75

Population meanμ1=70Population standard deviation σ1=2Sample size n1=50

Bob

Raw score (x2) = 72

Population meanμ2=65Population standard deviation σ2=3Sample size n2=50

 

 

steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS