Comparing sample means

Assignment Help Basic Statistics
Reference no: EM1397562

1. Why are you no longer directly comparing sample means?

2. How does using the F test - the analysis of variance (ANOVA) reduce your Type I error rate?

3. What is the difference between a within-groups and a between-groups variance?

4. If F is significant, why should you follow up with a post hoc test?

5. Why don't you use post hoc tests when F is not significant?

6. What are the assumptions of the F test?

7. How is the F test an extension of the t test?

8. Why are there two df measures with this test?

9. How do you interpret the findings of an ANOVA in terms of a variance measured

Reference no: EM1397562

Questions Cloud

Concepts involved in hypothesis testing : Explain the concepts involved in hypothesis testing, including what hypothesis testing is, and an explanation of the four types of scales used to measure data.
Independant simple random samples : Assuming the percentages are based on independant simple random samples of 1,000 first year college students drawn each year.
Find the thy mutant in the first place : A biologist was testing E. coli for thymidine requirement. She found a thy- point mutant and wanted to study reversion to thy+. She grew 20 cultures of the thy- mutant strain.
Benson trusts the best way to truly escape from his humdrum : Benson trusts the best way to truly escape from his humdrum life is on a sport-style motorcycle. He has nearly saved enough money to buy himself one
Comparing sample means : Why are you no longer directly comparing sample means? How does using the F test - the analysis of variance (ANOVA) reduce your Type I error rate? What is the difference between a within-groups and a between-groups variance?
How many oxygen molecules are required : What is the theoretical yield of SO 3 produced by the quantities described in Part A and How many Oxygen molecules are required to react with 7.82g of S?
How were the ideas significant to the success of the product : How did 3M's David Windorski get thoughts from college students to help him in designing the final commercial version of the Post-it Flag Highlighter?
Information about anova test : What are the null and alternative hypotheses for this test? Use ANOVA and the 0.05 level of significance in testing the null hypothesis identified in part (a).
Recognise at least two companies in different industries : Recognise at least two companies in different industries that are using acquisitions to strengthen their market positions. Describe how these acquisitions enhanced the acquiring companies'

Reviews

Write a Review

Basic Statistics Questions & Answers

  Standard deviation greatear than the target

If 16 measurements are taken and the standard deviation is 2.1 mg/dl is there enough evidence to support the claim that her standard deviation is greatear than the target at a = 0.01?

  Estimating the probability value using the given data

If there are 5 choices for a question and there is a 50% chance that the student knows the answer, what is the probability that the student knew the answer to a question he correctly answered?

  Rejection of the null hypothesis

Suppose that the results of the sample lead to rejection of the null hypothesis. Classify that conclusion as a:

  Coefficient of variation and standard deviation

Country A and Country C spends about the same amount on average per person per year. Which has the greater spread?

  Hypothesis test for difference between mean equal variance

Test hypothesis that mean weight of 2 sheets are equal against alternative that they are not(suppose equal variances). Use α=0.05 and suppose equal variances. Determine the P value.

  Multiple regression with independent variables

Identify at your place of work (or a previous place of work, or an organization with which you are affiliated). Identify a dependent variable and 3 independent variables

  Finding estimate and confidence interval for mean

Find out point estimate and 95% confidence interval for mean family dental expenses of all employees of company.

  Hypothesis testing for matched sample

Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.

  Finding null hypothesis against alternative that is higher

Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.

  High school students exercise problem

If 37% of high school students said that they exercise regularly, find the probability that 5 randomly selected high school students will say that they exercise regularly.

  Statistical inference to business decision scenarios

The manager of the Gander Mountain store in Frogtown, IL, believes that his prices for ammunition are lower than the prices of his primary competitor in the hunting equipment market, Cabela's.

  Probability that came from tyson wholesale

A defective picture tube was discovered in the latest shipment. What is the probability that it came from Tyson Wholesale?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd