Sketch the sampling distribution of xand calculate the probability that the sample mean will be greater than 193 mg/dl.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

Can you solve the question below?

When the population is Normally distributed, we know that the sampling distribution of xwill
be Normally distributed, so we can use Normal calculations. However, most population
distributions are not Normally distributed. If our sampling distribution is skewed, non-Normal in
some other way, or totally unknown, we cannot use Normal calculations to answer questions.
Thankfully, a pretty remarkable fact about sample means helps us out: The Central Limit
Theorem (CLT). When the sample size is large, the shape of the sampling distribution of xwill
be approximately Normal no matter what the shape of the population distribution may be! The
AP Statistics people define "large" to be any sample thatts at least 30. So, if n 230, we can
be safe in assuming that the sampling distribution of x will be approximately Normal and we
can proceed to perform Normal calculations. If n < 30, we can only proceed if we know the
population distribution is Normal.
The blood cholesterol level of adult men has mean 188 mg/dhand standard deviation 41mg/dl.
An SRS of 250 men is selected and the mean blood cholesterol level in the sample is
calculated.
Sketch the sampling distribution of xand calculate the probability that the sample mean will be
greater than 193 mg/dl.
Transcribed Image Text:When the population is Normally distributed, we know that the sampling distribution of xwill be Normally distributed, so we can use Normal calculations. However, most population distributions are not Normally distributed. If our sampling distribution is skewed, non-Normal in some other way, or totally unknown, we cannot use Normal calculations to answer questions. Thankfully, a pretty remarkable fact about sample means helps us out: The Central Limit Theorem (CLT). When the sample size is large, the shape of the sampling distribution of xwill be approximately Normal no matter what the shape of the population distribution may be! The AP Statistics people define "large" to be any sample thatts at least 30. So, if n 230, we can be safe in assuming that the sampling distribution of x will be approximately Normal and we can proceed to perform Normal calculations. If n < 30, we can only proceed if we know the population distribution is Normal. The blood cholesterol level of adult men has mean 188 mg/dhand standard deviation 41mg/dl. An SRS of 250 men is selected and the mean blood cholesterol level in the sample is calculated. Sketch the sampling distribution of xand calculate the probability that the sample mean will be greater than 193 mg/dl.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman