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Analysis of Variance

Differences between hypotheses testing methods

Describe in detail the differences in ANOVA and the five-step hypothesis testing method. 1. State hypothesis and alternate. 2. Level of significance 3. Identify test statistic 4. Formulate decision rule 5. Make the decision to accept or reject null hypothesis

2 Problems

Both of problems should be in excel file. 1. Did you ever purchase a bag of M&M's candies and wonder about the distribution of colors? You can go to the website and click the United States on the map, the click About M&M's, then History, Products, and Peanut and find the percentage breakdown according to t

The one-tailed test with the rejection area in the upper tail of the z-curve was used. Computed z-score was 1.79. What does it mean? At 0.05 level of significance, is there a difference in the mean numbers of cameras sold at the three department store chains? At the .05 level of significance, determine whether there is a relation between the income level and the type of vehicle purchased.

1) Experiment was conducted at the .01 level of significance. The one-tailed test with the rejection area in the upper tail of the z-curve was used. Computed z-score was 1.79. What does it mean? A. We should reject H0 and accept H1. B. We should not reject H0. C. We should have used the .05 level of significance. D. We shou

Descriptive Statistics

Three universities administer the same comprehensive examination to the recipients of MBA degree. From each university, a random sample of MBA recipients was selected, and these recipients were then given the exam. The following scores were recorded. For university A: 89, 95, 75, 92, 99. For university B: 60, 95, 89, 80. For uni

Testing Hypotheses in Statistics

The following is sample information. Test the hypothesis that the treatment means are equal. Use the .05 significance level. (See attached file). a. State the null hypothesis and the alternate hypothesis. b. What is the decision rule? c. Compute SST, SSE, and SS total. d. Complete an ANOVA table. e. State your decision

Analysis of Variance Post Hoc Analysis

A seminar is given to three levels of managers (highlevel, midlevel, lowlevel).The facilitators believe the evaluations may vary with the audience. The ratings are on a scale from 1-10 with 10 being the highest. Use a one-way ANOVA to determine whether there is a significant difference in evaluations according to manager level

Statistical assumptions and results

The attached data set is a study that was conducted to determine whether there is a difference between three types of therapy. The participants in this study were clients who agreed to participate. Participants were randomly assigned to the three therapy types, carried out by equivalently skilled therapists. The outcome score

Psychology statistical analysis

Researchers conduct a study in which three groups of research participants are exposed to three different conditions, after which their heart rate is measured. In condition one, the group is asked to place their right hand for three minutes into a pot of water that is 90 degrees. In condition two, the second group is asked to

Difference in Mean Production Rate

The Chapin Manufacturing Company operates 24 hours a day, five days a week. The workers rotate shifts each week. Management is interested in whether there is a difference in the number of units produced when the employees work on various shifts. A sample of five workers is selected and their output recorded on each shift. At the

Test if there is significant difference between means of 3 samples.

16-9. At, the median salary for a chiropractor in Kansas is $82,400 per year. A group of recent graduates believe this amount is too low. In a random sample of 205 chiropractors who recently graduated, 170 began with a salary of more than $82,400 and five earned a salary of exactly $82,400. 1. State the null an

ANOVA tables for description of problems.

Fill in the missing entries using a one-way ANOVA table. Source DF SS MS=SS/df F- statistic Treatment 2.124 0.708 0.75 Error 20 Total Construct the one way ANOVA table for the data. Compute SSTR and SSE using the defining formula: SST = sum(x-xbar) squared SSTR = sum of size of sample from population (me

Which statistical test do I use to compare groups?

Which statistical test do I use to find out: "Do the socioeconomic groups differ on life satisfaction, health, perceived control, mobility, self esteem, and social interaction? Which group/s differ from the others? " I am doing analysis on survey data in SPSS file.


Chapter 11 24.The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,160 hours (90 days). As an experiment, Holdlonger was added to the chlorine to find whether it would increa

Statistics for business and economics, volatility

Here are the questions I need help with. I attached the 2 excel files (File: InvRisk and File: Invest) that go with each statistics problems below. There are 2 statistics problems. The statistics text I'm using is: Statistics for Business and Economics, 9e by Anderson Sweeney Williams. The accounting text I use is: Understa

Mean and Sample

The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours s

Problem with statistical method type

What statistical method is used to accept or reject the null hypothesis in determining if outsourcing is always beneficial? Please explain your reasons for choosing the selected method in detail and cite references (if any). Also, explain the variables for which data will be collected. For each variable, identify the level

Chi Square or ANOVA or T-Test(s)

I have collected data for my pschology experiment and I am uncertain which analysis test to run. Although they will all be a challenge since this is my first year of University and we haven't done much stats work yet. Participants were shown an image and asked to choose what they thought the people in the picture were likely

Diet Statistical Analysis

A physician who specializes in weight control has three different diets she recommends. As an experiment, she randomly selected 15 patients and then assigned 5 to each diet. After three weeks the following weight losses, in pounds, were noted. At the 0.05 significance level, can she conclude that there is a difference in the mea


A. The number of shares of Icom, Inc. turned over during a month, and the price at the end of the month are listed in the following table. Also given are the estimated Y' values. Turnover (thousands of shares) X Y(actual price) Y'(estimated price) 4 $2

How do I do a two way Anova test and analyze the data?

Please view the attachment which more clearly defines my problem. --- Choose two sets of hypothesis using ANOVA you can simulate your own data (n=20) Sample size =288. Ho=u2=u3 where u means population. H1:u1#u2#u3. where u means population. I am trying to figure out how to do this problem. Test two sets of hypothesis

ANOVA, Hypothesis Tests and F-Tests

(See attached file for full problem description with proper symbols and diagrams) --- 2. What is the critical F value for a sample of four observations in the numerator and seven in the denominator? Use a one-tailed test and the .01 significance level. 3. The following hypotheses are given. A random sample of eight

ANOVA Questions

Here are some questions that I am asking in general to using ANOVA testing. 1) What are three lessons learned relative ANOVA and Nonparametric tests? 2) What concepts and analytic tools will you be able to use in your workplace ?

Experimental Design and Analysis

You are a training manager for a manufacturing firm and have three new training programs to assess. You assign, at random, equal numbers of employees to each of the training programs in order to determine which program is most efficient. How might you go about analyzing the results? I am trying to decide which test to use?

Are the Three Treatment Means Equal?

Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level. a. State the null hypothesis and the alternative hypothesis. b. What is the decision rule? c. Compute SST, SSE, and SS total. d. Complete an ANOVA table. e. State your decision regarding the null h