Stati sti cs - Portage Online Summer 2018
MATH 110 Module 5 Exam.| PORTGE LEARNING
Module 5 Exam
Exam Page 1
Suppose that you take a sample of size 18 from a population that is not normally
distributed. Can the sampling distribution of xx be approximated by a normal
probability distribution?
No, the sampling distribution of xbar cannot be approximated by a normal probability
distribution because the population is "not normally" distributed and the sample size is
less than 30.
Suppose that you take a sample of size 18 from a population that is not normally
distributed. Can the sampling distribution of xx be approximated by a normal
probability distribution?
No. The population is not normally distributed, therefore, we need a sample size of at
Exam Page 2
Suppose that you are attempting to estimate the annual income of 1100 families. In
order to use the infinite standard deviation formula, what sample size, n, should you
use?
(n / N )
≤0.05 N =
1100
n ≤ (0.05 x 1100 ) = 55
n ≤ 55
The sample size (n) has to be less than or equal to 55
Suppose that you are attempting to estimate the annual income of 1100 families. In
order to use the infinite standard deviation formula, what sample size, n, should you
use?
This study source was downloaded by 100000834306259 from CourseHero.com on 04-20-2022 03:03:54 GMT -05:00
https://www.coursehero.com/file/32343956/Module-5-Examdocx/
MATH 110 Module 5 Exam.| PORTGE LEARNING
Module 5 Exam
Exam Page 1
Suppose that you take a sample of size 18 from a population that is not normally
distributed. Can the sampling distribution of xx be approximated by a normal
probability distribution?
No, the sampling distribution of xbar cannot be approximated by a normal probability
distribution because the population is "not normally" distributed and the sample size is
less than 30.
Suppose that you take a sample of size 18 from a population that is not normally
distributed. Can the sampling distribution of xx be approximated by a normal
probability distribution?
No. The population is not normally distributed, therefore, we need a sample size of at
Exam Page 2
Suppose that you are attempting to estimate the annual income of 1100 families. In
order to use the infinite standard deviation formula, what sample size, n, should you
use?
(n / N )
≤0.05 N =
1100
n ≤ (0.05 x 1100 ) = 55
n ≤ 55
The sample size (n) has to be less than or equal to 55
Suppose that you are attempting to estimate the annual income of 1100 families. In
order to use the infinite standard deviation formula, what sample size, n, should you
use?
This study source was downloaded by 100000834306259 from CourseHero.com on 04-20-2022 03:03:54 GMT -05:00
https://www.coursehero.com/file/32343956/Module-5-Examdocx/
