BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

Solutions

Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

A population has a mean of µ = 80 and a standard deviation of σ = 20.

  • a. Would a score of X = 70 be considered an extreme value (out in the tail) in this sample?
  • b. If the standard deviation were σ = 5, would a score of X = 70 be considered an extreme value?

a.

To determine

To check: Whether the score of X=70 would be considered an extreme value in the sample.

Explanation

Given info:

The population has a mean of μ=80 and standard deviation of σ=20

The score is X=70.

Calculation:

In a normal distribution with mean μ and standard deviation σ, 68% of all observations lie within one standard deviation about the mean, that is, in the interval (μσ, μ+σ).

Substitute the value for μ=80 and for σ=20

b.

To determine

To check: Whether the score of X=70 would be considered an extreme value in the sample if standard deviation is σ=5.

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Math Solutions

Find more solutions based on key concepts

Show solutions add

Is it possible to obtain a negative value for the variance or the standard deviation?

Statistics for The Behavioral Sciences (MindTap Course List)

In Exercises 5-8, plot the graph of the function f in an appropriate viewing window. (Note: The answer is not u...

Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach

38. For Are and defined? What size is each product? Can =? Explain.

Mathematical Applications for the Management, Life, and Social Sciences

Evaluate the expression sin Exercises 116. 3(2)0

Finite Mathematics and Applied Calculus (MindTap Course List)

True or False: In general, better approximations to the area under the curve y = f(x) between x = a and x = b a...

Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th

True or False: is a geometric series.

Study Guide for Stewart's Multivariable Calculus, 8th