Concept explainers
(a)
To calculate: the percentage and create a bar chart showing the relation between time spent on extracurricular activities and results and description.
(a)
Explanation of Solution
Given:
Graph:
Histogram:
Calculation:
<2 | 2 to 12 | >12 | |
C or better | 0.55 | 0.7473 | 0.375 |
D or F | 0.45 | 0.2527 | 0.625 |
If the tasks are between 2 and 12 hours a week, most passing grades are received. If the tasks are more than 12 hours a week, the least amount of passing grades are received.
(b)
To Explain: the reason that not perform a chi-square test in this setting.
(b)
Explanation of Solution
The chi-square test requires a minimum of 5 values. The cumulative column of more than 12 is 8 and so less than 5 is at least one of the estimated counts of more than 12. The chi-square test should also not be used.
Chapter 11 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Fundamentals of Statistics (5th Edition)
Statistics for Business and Economics (13th Edition)
Essentials of Statistics (6th Edition)
Basic Business Statistics, Student Value Edition (13th Edition)
Intro Stats
Elementary Statistics (13th Edition)
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