Hypothesis Test for Independent Groups Two Means

Slides:

Advertisements

Similar presentations

Four girls soccer teams took a random sample of players regarding the number of goals scored per game. The results are below. Use a significance level.

Advertisements

Hypothesis testing –Revisited A method for deciding whether the sample that you are looking at has been changed by some type of treatment (Independent.

The Proper Conclusion to a Significance Test. Luke Wilcox is an “acorn” at the 2013 AP Statistics reading. After three days of scoring, his table leader.

College Prep Statistics Chapter 8 Dart Throw Final Review.

© 2010 Pearson Prentice Hall. All rights reserved Hypothesis Testing Using a Single Sample.

© 2001 Prentice-Hall, Inc.Chap 9-1 BA 201 Lecture 15 Test for Population Mean Known.

Test for a Mean. Example A city needs $32,000 in annual revenue from parking fees. Parking is free on weekends and holidays; there are 250 days in which.

BCOR 1020 Business Statistics Lecture 20 – April 3, 2008.

Chapter 9 Hypothesis Testing II. Chapter Outline  Introduction  Hypothesis Testing with Sample Means (Large Samples)  Hypothesis Testing with Sample.

Copyright © 2013 Pearson Education, Inc. Publishing as Prentice Hall Statistics for Business and Economics 8 th Edition Chapter 9 Hypothesis Testing: Single.

How tired are students in the morning ? Jose Almanza Period

Hypothesis Testing with Two Samples

Descriptive statistics Inferential statistics

Claims about a Population Mean when σ is Known Objective: test a claim.

The table shows a random sample of 100 hikers and the area of hiking preferred. Are hiking area preference and gender independent? Hiking Preference Area.

Chapter 9 Hypothesis Testing II: two samples Test of significance for sample means (large samples) The difference between “statistical significance” and.

STATISTICAL INFERENCE PART VIII HYPOTHESIS TESTING - APPLICATIONS – TWO POPULATION TESTS 1.

1 BA 275 Quantitative Business Methods Confidence Interval Estimation Estimating the Population Proportion Hypothesis Testing Elements of a Test Concept.

STEP BY STEP Critical Value Approach to Hypothesis Testing 1- State H o and H 1 2- Choose level of significance, α Choose the sample size, n 3- Determine.

STEP BY STEP Critical Value Approach to Hypothesis Testing 1- State H o and H 1 2- Choose level of significance, α Choose the sample size, n 3- Determine.

Slide Slide 1 Section 8-6 Testing a Claim About a Standard Deviation or Variance.

The average work week for employees in an internet start up company is believed to be about 65 hours. A newly hired marketing employee hopes that it is.

Section 9.2 Hypothesis Testing Proportions P-Value.

Section A Confidence Interval for the Difference of Two Proportions Objectives: 1.To find the mean and standard error of the sampling distribution.

The table shows a random sample of 100 hikers and the area of hiking preferred. Are hiking area preference and gender independent? Hiking Preference Area.

Logic and Vocabulary of Hypothesis Tests Chapter 13.

A course is designed to increase mathematical comprehension. In order to evaluate the effectiveness of the course, students are given a test before and.

For her project, Maria bought 50 small bags of jelly beans. The average number of jelly beans in a small bag is 27. It is known that the standard deviation.

Hypothesis Testing Errors. Hypothesis Testing Suppose we believe the average systolic blood pressure of healthy adults is normally distributed with mean.

STEP BY STEP Critical Value Approach to Hypothesis Testing 1- State H o and H 1 2- Choose level of significance, α Choose the sample size, n 3- Determine.

Statistical Inference Drawing conclusions (“to infer”) about a population based upon data from a sample. Drawing conclusions (“to infer”) about a population.

Mariana Lopez Carlos Aguilar Alex Rodriguez Period Commute time for senior student’s high school experience.

STATISTICAL INFERENCE PART VI HYPOTHESIS TESTING 1.

On average how many phones have you had since your first phone? Jesus Guerrero Period

Hypothesis Testing Steps for the Rejection Region Method State H 1 and State H 0 State the Test Statistic and its sampling distribution (normal or t) Determine.

Related Sample t-test A related sample t-test is used when participants in the two groups are not independent of participants in the other groups. – Repeated.

Chapter 10 Section 5 Chi-squared Test for a Variance or Standard Deviation.

STEP BY STEP Critical Value Approach to Hypothesis Testing 1- State H o and H 1 2- Choose level of significance, α Choose the sample size, n 3- Determine.

Lesson Runs Test for Randomness. Objectives Perform a runs test for randomness Runs tests are used to test whether it is reasonable to conclude.

EXAMPLE 1 with a standard deviation of $7,000 for a sample of 35 households. At the.01 significance level can we conclude the mean income in Bradford is.

Do 1 problem in which you do a 1-sample hypothesis test with statistics (mean). Veronica Coronado Sandra Gomez.

Ex St 801 Statistical Methods Part 2 Inference about a Single Population Mean (HYP)

Significance Test for a Mean

Hypothesis Tests Large Sample Mean

Unit 8 Section 7.5.

Lecture Nine - Twelve Tests of Significance.

Chapter 7 Hypothesis Testing with One Sample.

Statistics Chapter 7 Review.

Chapter 8 Hypothesis Testing with Two Samples.

MATH 2311 Section 8.2.

اختبار الفرضيات اختبارالفرضيات المتعلقة بالوسط

Chapter 7 Hypothesis Testing with One Sample.

Inferential Statistics and Probability a Holistic Approach

Inference about Two Means: Independent Samples

Hypothesis Tests One Sample Means

Hypothesis Test for Independent Groups Two Proportions

Elementary Statistics: Picturing The World

Inference Confidence Interval for p.

Which gender has a faster reaction time?

Sample Mean Compared to a Given Population Mean

Sample Mean Compared to a Given Population Mean

Chapter Outline Inferences About the Difference Between Two Population Means: s 1 and s 2 Known.

Hw 2 Prob 1 Two new methods for producing a tire have been proposed. To ascertain which is superior, a tire manufacturer produces a sample of 10 tires.

Hypothesis Testing for Proportions

Testing a Claim About a Standard Deviation or Variance

Hypothesis Test for Proportions

Inference Concepts 1-Sample Z-Tests.

STAT 1301 Tests of Significance about Averages.

Use invNorm (2nd VARS 3) functions: Use invT (2nd VARS 4) functions:

Presentation transcript:

Hypothesis Test for Independent Groups Two Means Two different computer firms manufacture laptop computers. Random samples are selected from each firm and the following data is collected. Firm A: nA=20 sA=$100 = $1500 Firm B: nB=22 sB=$200 = $1900 Test the claim that the average price of Firm A’s laptop is no different from the average price of Firm B’s laptop Ho: uA = µB Ha: uA ≠ uB

Hypothesis Test for Independent Groups Two Means = difference between the average price of Firm A’s and Firm B’s laptops Distribution for the Test: Student-t for the difference of two means

Hypothesis Test for Independent Groups Two Means USE A 2-SampTTest. Test statistic: t = -8.31 Standardized score for p-value: ≈ 0

Hypothesis Test for Independent Groups Two Means Decision: Assume REJECT H0. Conclusion: There is sufficient evidence to conclude that the average price of Firm A’s laptop is different from the average price of Firm B’ laptop.