Answered: A simple random sample of 30 residents…

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

A simple random sample of 30 residents from Seattle is taken to estimate the median income of all Seattle residents.
Is this study
A. REPRESENTATIVE?
B. NON-REPRESENTATIVE?
A sample of professional football players is taken to estimate the mean weight of all adult males.
Is this study
A. REPRESENTATIVE?
B. NON-REPRESENTATIVE?
A telephone survey is conducted during the day in order to determine the chances of a certain candidate winning an election.
Is this study
A. REPRESENTATIVE?
B. NON-REPRESENTATIVE?
Using a sample of 40 patients from a local hospital, researchers measured cholesterol level in an attempt to estimate the mean cholesterol level of U.S. citizens.
Is this study
A. REPRESENTATIVE?
B. NON-REPRESENTATIVE?

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

Expert Solution

Step 1

Given that

A simple random sample of 30 residents from Seattle is taken to estimate the median income of all Seattle residents.

Is this study

A. REPRESENTATIVE

B. NON-REPRESENTATIVE

A sample of professional football players is taken to estimate the mean weight of all adult males.

Is this study

A. REPRESENTATIVEB.

B..NON-REPRESENTATIVE

A telephone survey is conducted during the day in order to determine the chances of a certain candidate winning an election.

Is this study

A. REPRESENTATIVE?

B. NON-REPRESENTATIVE?

Using a sample of 40 patients from a local hospital, researchers measured cholesterol level in an attempt to estimate the mean cholesterol level of U.S. citizens.

Is this study

A. REPRESENTATIVE?

B. NON-REPRESENTATIVE