Concept explainers
(a)
To explain: L can be modelled by a binomial distribution.
(a)
Explanation of Solution
Given information:
L is the number of left handed students in the sample.
Percentage of left handed students at a large school = 11%
Concept used:
10% condition
n < 0.10N
The rule says that if the sample is less than
Here, the sample size (
Moreover, here the left handedness of one student does not give any idea of the left handedness of other student, so trial of each student is independent.
So,
Hence, L can be modelled by a binomial distribution.
(b)
To calculate:
(b)
Answer to Problem 99E
Probability that more than or equal to 15 students in the sample are left handed is 0.13305.
Explanation of Solution
Calculation:
Using TI- 83 plus
a) Click on
b) Go to binomcdf with
c) Hit Enter
d) Type 100, 0.11, 14)
e) Hit Enter
The probability comes to be 0.86695.
Chapter 6 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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