   Chapter 9, Problem 8P Essentials of Statistics for the B...

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

Solutions

Chapter
Section Essentials of Statistics for the B...

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

A random rumple of n = 25 individuals is selected from a population with μ = 20, and a treatment is administered to each individual in the sample. After treatment, the sample mean is found to be M = 22.2 with SS = 384.a. How much difference is there between the mean for the treated sample and the mean for the original population? (Note: In a hypothesis test, this value forms the numerator of the t statistic.)b. If there is no treatment effect, how, much difference is expected between the sample mean and its population mean? That is, find the standard error for M. (Note: In a hypothesis test, this value is the denominator of the t statistic.)c. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α = .05.

a.

To determine

To find: The difference between the mean for the treated sample and the mean for the original population for the given question

Explanation

Given info:

A sample of 25 individuals is selected from a population with mean 20. The sample mean and sum of squared difference (SS) is found to be 22.2 and 384 respectively.

Calculation:

The difference can be calculated using formula:

...

b.

To determine

To find: The standard error for mean.

c.

To determine

To find: Whether or not the treatment has significant effect at α=0.05.

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

Explain the difference between a matched-subjects design and a repeated-measures design.

Essentials of Statistics for The Behavioral Sciences (MindTap Course List)

Evaluate the indefinite integral. (arctanx)2x2+1dx

Single Variable Calculus: Early Transcendentals

Find the derivative of the function. y=2x3x+1sin(t4)dt

Single Variable Calculus: Early Transcendentals, Volume I

True or False: is conservative.

Study Guide for Stewart's Multivariable Calculus, 8th

The x-coordinate of the center of mass of the region bounded by , x = 1, x = 2, y = 0 is: ln 2 1 2 ln 2

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