PRACTICE OF STATISTICS F/AP EXAM
PRACTICE OF STATISTICS F/AP EXAM
6th Edition
ISBN: 9781319113339
Author: Starnes
Publisher: MAC HIGHER
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 11.2, Problem 64E

a)

To determine

To find the mean and standard deviation of the ratings for the students given in 1 to 5 scale.

a)

Expert Solution
Check Mark

Answer to Problem 64E

Mean = 3.5455 and standard deviation = 1.1843

Explanation of Solution

The mean is,

  x¯=1×2+2×3+3×1+4×13+5×32+3+1+13+3=3.5455

The standard deviation,

  s=(13.5455)2×2+(23.5455)2×3+(33.5455)2×1+(43.5455)2×13+(53.5455)2×32+3+1+13+31s=1.1843

b)

To determine

To find the mean and standard deviation of the adjusted ratings.

b)

Expert Solution
Check Mark

Answer to Problem 64E

The adjusted mean = 4.21 and adjusted sd = 0.568

Explanation of Solution

Given:

Mean and standard deviation for scale 0-4:

  x¯04=3.21s04=0.568

The adjusted mean and standard deviationare,

  x¯(04)+1=x¯04+1=3.21+1=4.21s(04)+1=0.568

c)

To determine

To explain whether it is appropriate to test means using a two-sample t test.

c)

Expert Solution
Check Mark

Answer to Problem 64E

No.

Explanation of Solution

The given variables having ratings with corresponding to their frequency. Therefore, these are categorical variables. For two sample t test, data should be numerical. Hence, it is not appropriate to use a two-sample t test.

Chapter 11 Solutions

PRACTICE OF STATISTICS F/AP EXAM

Knowledge Booster
Background pattern image
Statistics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Text book image
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Text book image
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Text book image
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Text book image
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
Text book image
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Text book image
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman
Propositional Logic, Propositional Variables & Compound Propositions; Author: Neso Academy;https://www.youtube.com/watch?v=Ib5njCwNMdk;License: Standard YouTube License, CC-BY
Propositional Logic - Discrete math; Author: Charles Edeki - Math Computer Science Programming;https://www.youtube.com/watch?v=rL_8y2v1Guw;License: Standard YouTube License, CC-BY
DM-12-Propositional Logic-Basics; Author: GATEBOOK VIDEO LECTURES;https://www.youtube.com/watch?v=pzUBrJLIESU;License: Standard Youtube License
Lecture 1 - Propositional Logic; Author: nptelhrd;https://www.youtube.com/watch?v=xlUFkMKSB3Y;License: Standard YouTube License, CC-BY
MFCS unit-1 || Part:1 || JNTU || Well formed formula || propositional calculus || truth tables; Author: Learn with Smily;https://www.youtube.com/watch?v=XV15Q4mCcHc;License: Standard YouTube License, CC-BY