Hey People—It`s Not Math—It`s STATISTICS!
Hey People—It`s Not Math—It`s STATISTICS!

... profession for persons with at least 10 years of experience working in a certain market is greater than $100,000. She selects a random sample of 17 employees. It is found that their mean salary is $107,255 with a standard deviation of $13,415. At the 10% level of significance, is the mean salary for ...
t-test - JUdoctors
t-test - JUdoctors

9.1 Sampling Distributions (new)
9.1 Sampling Distributions (new)

Date
Date

Document
Document

For a population with a mean of µ=60 and a standard deviation of σ
For a population with a mean of µ=60 and a standard deviation of σ

μ = 10 H
μ = 10 H

two-sample t-test
two-sample t-test

Inference about a Population Mean, Two Sample T Tests, Inference
Inference about a Population Mean, Two Sample T Tests, Inference

Problem set 6 solutions
Problem set 6 solutions

PSYB07 Review Question
PSYB07 Review Question

... 1. Why is n-1 rather than n used in the denominator of the formula for variance, when it is used as an inferential statistic? When can n alone be used? 2. What is the difference between interval and ratio data? What is possible to do with the latter than is inappropriate to do with the former? 3. Gi ...
lab6 outline
lab6 outline

Basics of Statistics - University of Delaware
Basics of Statistics - University of Delaware

Hypothesis testing (Chapter 5 of Wilks) :
Hypothesis testing (Chapter 5 of Wilks) :

One Sample T-test
One Sample T-test

Hypothesis Testing
Hypothesis Testing

CENTRAL LIMIT THEOREM
CENTRAL LIMIT THEOREM

1. (10%) Illustrate by concise examples (no more than 30 words for
1. (10%) Illustrate by concise examples (no more than 30 words for

Comparison of
Comparison of

Ch8
Ch8

t α/2
t α/2

Elementary Statistics
Elementary Statistics

Module 10 Review Questions
Module 10 Review Questions

PPT - StatsTools
PPT - StatsTools

1. For a particular sample of 63 scores on a psychology exam, the
1. For a particular sample of 63 scores on a psychology exam, the

Student's t-test

A t-test is any statistical hypothesis test in which the test statistic follows a Student's t-distribution if the null hypothesis is supported. It can be used to determine if two sets of data are significantly different from each other, and is most commonly applied when the test statistic would follow a normal distribution if the value of a scaling term in the test statistic were known. When the scaling term is unknown and is replaced by an estimate based on the data, the test statistic (under certain conditions) follows a Student's t distribution.