Northrise University
30029 Kitwe – Ndola Dual Carriage Highway. P.O Box 240271, Ndola, Zambia.
ASSIGNMENT COVER SHEET
Student ID: 1905504
Student Name: Chibabula Patrick
Course Code: STAT101
Course Title: Business Statistics
Instructor Name: Mrs. Rita Banda
Essay/Assignment Title: Assignment 2
Due Date: 27th April, 2020
Declaration:
I acknowledge that submitting this document binds me to the following:
To the best of my knowledge, I assert that no part of this assignment has been copied from the work of anyone else, be it another student
or any other author or from any source except where due credit is given in the text below, or has been written for me by someone else
except where the relevant instructors and authorities have explicitly permitted such collaboration.
SIGNATURE: P. Chibabula
Instructor’s Comments:
GRADE [ ]
1) Below is a random variable x whose possible outcome ranges from 5 to 12 listed with the probability
of each possible outcome.
x
5
6
7
8
9
10
11
12
P(x)
0.008
0.015
0.038
0.069
0.115
0.162
0.362
0.231
A. Prove that ∑P(x) = 1
Solution.
Therefore for us to prove that the probability of the distribution above sums up to 1 we look at property
two of discrete distribution which states that a random discrete variable X is said to have a discrete
