Log In Start studying!

Select your language

Suggested languages for you:

Americas

English (US)

Europe

Q.8.75

Expert-verified

Introductory Statistics

Found in: Page 482

Book edition OER 2018

Author(s) Barbara Illowsky, Susan Dean

Pages 902 pages

ISBN 9781938168208

Answers without the blur.

Just sign up for free and you're in.

Register for Free I’ll do it later

Short Answer

A poll of 1,200 voters asked what the most significant issue was in the upcoming election. Sixty-five percent answered the economy. We are interested in the population proportion of voters who feel the economy is the most important.
Define the random variable P′ in words.

The $P'$ defines a random variable that shows the proportion of voters that feels like the economy is the most important issue,

See the step by step solution

Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Given information

Given in the question that

A poll of 1,200 voters asked what the most significant issue was in the upcoming election. Sixty-five percent answered the economy.

Step 2: Solution

The $X$ is a random variable that signifies the number of success that the voters feel that the economy is most important

Here $P^{'}$ is the proportion of voters that feels like the economy is the most important issue.

Most popular questions for Math Textbooks

In one complete sentence, explain what the interval means.

The Ice Chalet offers dozens of different beginning iceskating classes. All of the class names are put into a bucket. The 5 P.M., Monday night, ages 8 to 12, beginning ice-skating class was picked. In that class were 64 girls and 16 boys. Suppose that we are interested in the true proportion of girls, ages 8 to 12, in all beginning ice-skating classes at the Ice Chalet. Assume that the children in the selected class are a random sample of the population.

Define a new random variable P′. What is p′ estimating?

In words, define the random variables $X$ and $\bar{X}$ .

The data in the Table are the result of a random survey of $39$ national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let $X =$ the number of colors on a national flag.

$\begin{matrix} x & Freq. \\ 1 & 1 \\ 2 & 7 \\ 3 & 18 \\ 4 & 7 \\ 5 & 6 \end{matrix}$

Construct a $95 %$ confidence interval for the true mean number of colors on national flags.

How much area is in both tails (combined)?

During the 2013 regular NBA season, DeAndre Jordan of the Los Angeles Clippers had the highest field goal completion rate in the league. DeAndre scored with 61.3% of his shots. Suppose you choose a random sample of 80 shots made by DeAndre during the 2013 season. Let X = the number of shots that scored points.

a. What is the probability distribution for X?

b. Using the formulas, calculate the (i) mean and (ii) standard deviation of X.

c. Use your calculator to find the probability that DeAndre scored with 60 of these shots.

d. Find the probability that DeAndre scored with more than 50 of these shots

Want to see more solutions like these?

Sign up for free to discover our expert answers

Get Started - It’s free

Recommended explanations on Math Textbooks

94% of StudySmarter users get better grades.

Sign up for free