Q.8.1 Suppose we have data from a samp... [FREE SOLUTION]

91影视

Introductory Statistics

Barbara Illowsky, Susan Dean

$Math Studyset 91影视 Explanations$ Math

OER 2018 Edition 路 902 pages

ISBN: 9781938168208

Chapter 8: Q.8.1 (page 446)

Suppose we have data from a sample. The sample mean is $15$ , and the error bound for the mean is $3.2$ . What is the confidence interval estimate for the population mean?

Short Answer

Expert verified

The confidence interval estimate for the population mean is ( $11.8, 18.2$ )

Step by step solution

Given Information

Given in the question that,

sample mean = $15$

error bound for the mean = $3.2$

Step 2: Explanation

If $\bar{x}$ is the sample mean of a random sample of size n from a normal population with known variance, a Cl (confidence interval) on $渭$ is given by

$\overset{炉}{x} 鈭� E B M 鈮� 渭鈮� \overset{炉}{x} + E B M$ (1)

where EBM is the error bound for a population mean. We know that the sample mean is $15$ and the error bound for the mean is $3.2$ . Therefore $\overset{炉}{x} = 15 and E B M = 3.2$

So,from equation (1) we get

$15 鈭� 3.2 鈮� 渭鈮� 15 + 3.2$

The confidence interval estimate for the population mean is ( $11.8, 18.2$ ). We say, "We estimate with $90$ % confidence that the true value of the population mean is between $11.8$ and $18.2$ ," if the confidence level is $90$ % . $\overset{炉}{x} 鈭� E B M 鈮� 渭鈮� \overset{炉}{x} + E B M$

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Phone Model	SAR	Phone Model	SAR
Blackberry pearl $8120$	$1.48$	Nokia E71x	$1.53$
HTC Evo Design 4G	$0.8$	Nokia N $75$	$0.68$
HTC Freestyle	$1.15$	Nokia N $79$	$1.4$
LG Ally	$1.36$	Sagem Puma	$1.24$
LG Fathom	$0.77$	Samsung Fascinate	$0.57$
LG Optimus Vu	$0.462$	Samsung Infuse 4G	$0.2$
Motorola Cliq XT	$1.36$	Samsung Nexus S	$0.51$
Motorola Droid pro	$1.39$	Samsung Replenish	$0.3$
Motorola Droid Razr M	$1.3$	Sony W5 $18$ a walkman	$0.73$
Nokia $7705$ Twist	$0.7$	ZTE C $79$	$0.869$

91影视

Suppose we have data from a sample. The sample mean is $15$ , and the error bound for the mean is $3.2$ . What is the confidence interval estimate for the population mean?

Short Answer

Step by step solution

Given Information

Step 2: Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Logic and Functions

Pure Maths

Calculus

Applied Mathematics

Mechanics Maths

Probability and Statistics

Study anywhere. Anytime. Across all devices.

91影视

Suppose we have data from a sample. The sample mean is 15, and the error bound for the mean is 3.2. What is the confidence interval estimate for the population mean?

Short Answer

Step by step solution

Given Information

Step 2: Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Logic and Functions

Pure Maths

Calculus

Applied Mathematics

Mechanics Maths

Probability and Statistics

Study anywhere. Anytime. Across all devices.

Suppose we have data from a sample. The sample mean is $15$ , and the error bound for the mean is $3.2$ . What is the confidence interval estimate for the population mean?