Concept explainers
(a)
To Explain: the chance behaviour involved in this setting.
(a)
Explanation of Solution
Given:
80% of the students favours abolishing exams and took 10 students at arbitrary.
As per given 80% of the students favouring the abolishing the exams. It requires that each student should have the same chance of favouring abolish exam and the students are independent.
(b)
To Calculate: the digits to represent the answers “in favour” and “against”
(b)
Answer to Problem 7.14E
Favour: 0, 1, 2, 3, 4, 5, 6, 7
Not Favour: 8, 9
Explanation of Solution
Given:
80% of the students favour abolishing exams
8 out 10 students favour abolishing exams and rest of 2 do not favour abolishing exams.
Favour: 0, 1, 2, 3, 4, 5, 6, 7
Not Favour: 8, 9
(c)
To Calculate: the estimated
(c)
Answer to Problem 7.14E
0.4
Explanation of Solution
Given:
Using calculator or Table B
Formula used:
Calculation:
Randomly taken 25 numbers
7, 8, 9, 8, 7, 5, 4, 8, 9, 8, 8, 9, 8, 7, 8, 7, 8, 7, 8, 9, 7, 9, 7, 8, 7
There are total 10 digits between 0 to 7 numbers for 25 results. (Results may vary)
Chapter 7 Solutions
Statistics Through Applications
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