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Analysis of Variance

Confidence Interval & ANOVA

Problem Set 1: Chapter 12, problems 2, 4, 6, 12; Chapter 13, problems 4, 10, 14, 20, 26 Chapter 12 2. Explain why it would not be reasonable to use estimation after a hypothesis test for which the decision was to 'fail to reject Ho". 4. A researcher has constructed an 80% confidence interval of µ = 45 +/- 8, using a sa

T Statistic

What of the following is true for the repeated-measures t statistic? df = n1 + n2 - 2 df = n - 1 df = n1 + n2 - 1 df = (n1 - 1) + (n2 - 1)

Hypothesis testing problems : ANOVA

vehicle Miles per gallon xbar variance Panzer 9.3, 9.3 9.3 8.6 8.7 9.3 9.3 9.91 0.10 T-34 8.7, 7.7, 7.7, 8.7, 8.2, 9.0,7.4,7.0 8.03 0.60 Sherman 7.2

Repeated Measures ANOVA with SPSS

2. Repeated Measures ANOVA. Perform a repeated measures ANOVA using the "High_School_Scores.sav" data set. You will use Score_0 through Score_12 as your repeated measure (7 levels), and gender as a fixed factor. a. Is the assumption of sphericity violated? How can you tell? What does this mean in the context of interpreting the

Applying Analytical Strategies to an Area of Research Interest.

Part C. SPSS/PASW Activity The "High_Scool_Scores.sav" file contains a dataset of a high school teacher interested in determining whether his studentsââ?¬â?¢ test scores increase over the course of a 12 week period. In the dataset, you will find the following variables: Participant: unique identifier Gender: Male (

Applied Statistics in Health Care

The objectives here is based on Analysis of Variance (ANOVA) and focused on the understanding of: ââ?¬¢ the appropriate statistical formulas or tests for data analysis ââ?¬¢ the description of the logic of ANOVA and how it compares to t-tests. ââ?¬¢ the details on how ANOVA can be used in more complex exper

ANCOVA SPSS: Analyze and test data for effect of therapies for stalking behavior

See attachments. ANCOVA Stalking is a very disruptive and upsetting experience in which someone (the stalker) constantly harasses or obsesses about another person. Stalking can take many forms, from sending intensely disturbing letters to literally following you around in the places where you live and socialize. A psycholo

Two Way ANOVA: Aircraft Selection Problem

This problem involves a statistical analysis to recommend the best aircraft to purchase using results from different aircrews. While working for a test and evaluation facility you have been asked to make buying and future testing recommendations on the following data for l your service. Two F-16 pilots and one F-18 pilot were


1. Why use the Wilcoxon T test. What is the hypothesis statements you used? 2. Consider do we prefer working with dependent samples or independent samples? Explain 3. We have the statement "The F-ratio provides the ability to determine the deviation between the population and the means and develop a method of accepting or reje

One way ANOVA: Chi-Square Test

** Please see the attached file for the tables ** Are smoking habits of teenagers related to their parents' smoking? Perform a hypothesis test to determine if the smoking habits of teenagers are independent of the smoking habits of their parents. Test at the 0.05 level of significance. Do the mean heart rate fro the groups

Statistics: Birds Migrating vs brain size; test group vs individual performance

One possible explanation for why some birds migrate and others maintain year round residency in a single location is intelligence. Specifically, birds, with small brains, relative to their body size, are simply not smart enough to find food during the winter and must migrate to a warmer climate where food is easily available. B

Statistics - Convenience Sampling, ANOVA Analysis

I will be conducting a convenience sample, using an electronic survey. The target population consists of approximately 143 faculty members. I will be using descriptive stats and an ANOVA analysis to measure the differences of group means (age, tenure, gender) to organizational resistance. I need to write my setting and sample in

Two-Way ANOVAs: Interpret the Results from the Sex X Treatment

Two-Way ANOVAs Interpret the results from the sex X treatment condition ANOVA table you are given. Make sure to report the results in the APA format and write one to two sentences interpreting the results (main effects and the interaction). Factor df SS MS F

Power Tool Manufacturer: Important information about One Way ANOVA in SPSS

See attached file. A power tools manufacturer wants to buy a new assembly machine to make cordless drills. There are three different brands of assembly machines (AM1, AM2 and AM3) and the manufacturer has secured a test machine from the suppliers of each brand. Each machine needs an assembly worker to make the drills. The ma

Statistics: Conducting a One-Way ANOVA

A psychologist believes that the kind of feedback a person receives about their work affects the quality of the work. You randomly assign 12 widget makers to one of three groups: positive feedback only, corrective feedback only, and no feedback. You track the number of widgets that each person makes correctly (out of 10) and obt

Hypothesis Testing - Confidence Interval - ANOVA

1. An experiment was performed to compare the abrasive wear of two different laminated materials. Twelve pieces of material 1 were tested, by exposing each piece to a machine measuring wear. Ten pieces of material 2 were similarly tested. In each case, the depth of wear was observed. The samples of the material 1 gave an av

Normal Probability & ANOVA

4. A bank has kept records of the checking balances of its customers and determined that the average daily balances of its customers is $300 with a standard deviation of $48. A random sample of 144 checking accounts is selected. What is the probability that the sample mean will be at least $296? 5. Using the standard no

Null and Alternate Hypothesis: Store planning and design at Target

Color.sav data file is attached, but you need spss to open it. You are the new Director of store planning and design at Target. You come across an interesting article in the Journal of Consumer Research that suggests that the colors blue, green and yellow evoke positive emotions in consumers and may lead to increased impulse

Question About One way ANOVA

ANOVAs 1. A researcher is interested in comparing the effectiveness of three different kinds of therapy for anger problems. Eight participants are randomly assigned to three treatment conditions: Cognitive Therapy (CT), Cognitive-Behavioral Therapy (CBT), and Interpersonal Therapy (IT). All participants complete the weekly t

Quality Management and Six Sigma for Civic Hybrid models

See attached files. Civic Hybrid models QMT Advanced Design and Analysis Methods for Quality Assessment Introduction to Design of Experiments Assignment: Given Civic Hybrid models, find a situation in which DOE could be used. Determine which DOE situation type it is.. Assignment Expectations: Describe the situa

One Way ANOVA: Real world situation

Think about a real-world situation that can be addressed using a one-way ANOVA. For this situation, clearly state the independent and dependent variables you would study; generate the null and alternative hypothesis; explain why you would need a post hoc analysis; and using realistic numbers for values of df, n, f-ratio, confide

One Way ANOVA: GMAT scores

An MBA director examined GMAT scores for the first ten MBA applicants (assumed to be a random sample of early applicants) for four academic quarters. Research question: Is there difference in the means among these six towns? Make a full one way Anova table with p value and f value included. GMAT Scores of First Ten Applica

Statistics: Menopausal bone-density measurement problem

It is believed that women in the post menopausal phase of life suffer from calcium deficiency. This is associated with a relatively high proportion of bone fractures were women in that age group. To determine this calcium deficiency is associated with estrogen deficiency, data were collected from three groups of women. The fi

Statistics: Test Student GPA va hours of sleep at night

See attached files. JUST NEED 2,3 AND 4 DONE . Assignment: 1. Chapter 12: 12.3 PLUS, compare to the results obtained by doing each X separately. Discuss. 2. The following data represent the number of hours of sleep that engineering students got per night and GPA. Is there a relationship between the two? You may use