PORTAGE LEARNING: MATH 110-INTRODUCTION TO STATISTICS QUESTIONS WITH PERFECT ELABORATED SOLUTIONS| LATEST AND VERIFIED EDITION ASSURED PASS!!! A+

PORTAGE LEARNING: MATH 110-INTRODUCTION TO
STATISTICS QUESTIONS WITH PERFECT ELABORATED
SOLUTIONS| LATEST AND VERIFIED EDITION ASSURED
PASS!!!



MATH 110 - Introduction
to Statistics Module 5




Exam
Exam Page 1
Suppose that you take a sample of size 50 from a population that is not normally
distributed. Can the sampling distribution of x̄ be approximated by a normal
probability distribution?
Yes, the sample size can be approximated by a normal probablity ditribution
because the sample size is greater than 30.
Answer Key
Suppose that you take a sample of size 50 from a population that is not
normally distributed. Can the sampling distribution of x̄ be approximated by a
normal probability distribution?
Yes. The sample size is greater than 30, therefore, we may approximate by a
normal probability distribution.

, Exam page 3
Suppose that you are attempting to estimate the annual income of 1200
families. In order to use the infinite standard deviation formula, what sample
size, n, should you use?


(n / N ) ≤0.05
N = 1200
n ≤ (0.05 x 1200 ) = 60

n ≤ 60
The sample size (n) has to be less than or equal to 60
n ≤ 60
The sample size (n) has to be less than or equal to 60




Answer Key
Suppose that you are attempting to estimate the annual income of 1200
families. In order to use the infinite standard deviation formula, what sample
size, n, should you use?
In order to use infinite standard deviation formula, we should have:




n≤0.05(1200)
n≤60
So, the sample size should be less than 60.