Answered: The researcher is interested in using…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

The researcher is interested in using the information in Table 3 to determine the probability that,
from a sample of 10 randomly selected adults, exactly 3 of them exceeds the required
standard for practices towards COFLU-20.
(a) Assist the researcher by:
(i) carefully defining the random variable of interest

(ii) identifying a suitable probability distribution to be used to find the probability that exactly
three (3) adults, out of 10, exceeds the required standard for practices towards COFLU-20.
State the value(s) of the parameter(s) for this distribution.

(iii) justifying the suitability of the probability distribution identified in part (ii).

QUESTION 2
To examine practices towards COFLU-20, the researcher examined the relevant responses from
the survey and assigned scores of 1 (below required standard), 2 (poor standards), 3 (satisfactory
standards), 4 (meets required standards) and 5 (exceeds required standard) to each respondent.
Using X to represent the score for practices against COFLU-20, the probability distribution of X
is shown in Table 3 below.
Table 3
2
0.197
3
5
0.2
0.173
P(X =x)
0.21
0.22

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