Share
Explore BrainMass

Chi-Squared Test

Statistics Dataset Sub-Samples

The dataset contains a sub-sample of 308, 4th and 6th grade students from Michigan created by Chase and Dummer. In this dataset we posit the question, "Are students personal goals choices related to their gender, and does this relationship differ by grade level?" In the answer, you will investigate the relationship between st

Chi-Square Goodness of Fit test in Excel: Normally Distributed

See attached data file. Need help performing a Chi-Square Goodness of Fit test to determine whether or not the prices of all 90 cars in the attachment are normally distributed. Please provide a short write-up in Word that interprets your output and a file that provides the statistical output or calculations in Excel P

Statistics: Flat tire, missed class, Benford's Law, Global Warming, Helmet Color

Chapter 11, Section 2 Problem 8 Conduct the hypothesis test and provide the test statistic, critical value and/or P-value, and state the conclusion. Flat Tire and Missed Class - A classic tale involves four carpooling students who missed a test and gave as an excuse a flat tire. On the makeup test, the instructor asked t

Define Log-Linear Models for Chi-Square Analysis

Please describe and define what the chi-square analysis is, the conditions under which it is used, and how it compares to the Pearson Correlation. ALSO describe and define what log-linear modeling is and the conditions under which it is used. Do not forget the operational definitions and examples!

Chi-Square Hypothesis Test for Playing a Slot Machine

A person purchased a slot machine and tested it by playing it 1,245 times. There are 10 different categories of outcomes, including no win, win jackpot, win with three balls, and so on. When testing the claim that the observed outcomes agree with the expected frequencies, the author obtained a test statistic of xsquared=10.413.

Chi-square Test for Goodness of Fit:Safety of corporate bond

1. Seven percent of mutual fund investors rate corporate stocks "very safe," 58% rate them "somewhat safe,." 24% rate them "not very safe," 4% rate them "not at all safe," and 7% are "not sure." A poll asked 529 mutual fund investors how they would rate corporate bonds on safety. The responses are as follows. Safety Ratin

Research and Evaluation Problems 3-35, 3-75, 15.18

See attached file for the tables. 3-35. A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, and super premium gasoline. Because of differences in the performance of different automobiles, seven different automobiles were selected and treated as blocks. Therefore, each brand of gasoline was te

Test Statistic for selected non-fatal occupational injuries and illnesses

Randomly selected non-fatal occupational injuries and illnesses are categorized according to the day of the week that they first occurred, and the results are listed below (based on data from the Bureau of Labor Statistics). Using a 0.05 level of significance (? = 0.05), test the claim that such injuries and illnesses occur

Chi-Square - Normal Distribution of credit card customer balances

See the attached file. (13.26) The outstanding balances for 500 credit-card customers are listed in file XR13026. Using the 0.10 level of significance, examine whether the data could have come from a normal distribution. Data is given in the spread sheet. Balance

Central Tendency for Standard Test Scores

I need assistance in with practice problems. Data for Practice Problems Standard Test Scores Name Gender Absences PE Math Writing Reading Alex Boy 5 49 85 86 80 Anthony Boy 18 51 39 71 75 Douglas Boy 1 82 74 78 79 Jorge Boy 4 56 66 68 60 Joshua Boy 5 83 79 78 77 Luke Boy 0 94 89 84 84 Robert Boy 17 36 36 56 50

BioStatistic: Binomial distributions, significance level, two sided P value

6.23 Fisher [1958] presented data of Geissler [1889] on the number of male births in German families with eight offspring. One model that might be considered for these data is the binomial distribution. This problem requires a goodness-of-fit test. (a) Estimate Π, the probability that a birth is male. This is done by usi

Statstics: AutoWrecks, Inc sells car insurance. Analyze moving violations

AutoWrecks, Inc. sells auto insurance. AutoWrecks keeps close tabs on its customers' driving records, updating its rates according to the trends indicated by these records. AutoWrecks' records indicate that, in a "typical" year, roughly 70% of the company's customers do not commit a moving violation, 10% commit exactly one movin

Statistics

Question#1: Provide a business example that you can apply Chi-square to and state the null and alternative hypothesis. Example: There are 4 facilities that manufacture soap for the same company. The Company marketing the soap has had a significant increase in claims over the past few months. The claims are for broken bars, an

Null and Alternate Hypothesis

Okay Okay Okay....I have to admit that the Scott Peterson case is relatively easy....since I give you the Expected (behavior) frequency distribution. In reality, that is not going to be the case (most of the time in your academic research). If you come across a data table in a study and the researchers utlize the chi-square as t

Chi-Square formula for Scott Peterson (Lacy Peterson) murder case

Please see attached file. I am sure all of you are familiar with the Scott Peterson (Lacy Peterson Murder Case) case from 2001/2002? A jury found Scott guilty and he is on death row. One of the major concerns during this process was whether or not Scott will get a fair trial. I am sure it was hard to pick a juror who had

Chi-square test of goodness of fit: Grade distribution

A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years. It is known that the overall grade distribution for the department in 1985 had 14% A's, 26% B's, 31% C's, 19% D's and 10% F's. A sample of n=200 psychology students from last semester

Chi square test for association: Finance & Income Range

A random sample of 100 people were asked if their finances were worse, the same or better than this time last year. The sample was split according to their annual income and the results are shown in the table below. Finances Annual income Worse Same Better Under £ 15000 14 11 9 £ 1500

Chi Square Goodness of Fit Hypothesis Test

Please go to the website given below to answer and solve the following assignment: http://www.stat.wmich.edu/s160/chisquare/book/node3.html Chi Square Hypothesis Testing Use the numerical data from one of the data sets available through the Data Sets link on your website. Conduct the equivalent, nonpara

Statistics Word Problems

Can you please help solve the following problems; I am having a hard time working them out. Can you also show all work. I will need it due back by Monday May 31st. Thank You. 1. The director of golf for the Links Group wishes to study the number of rounds of golf played by members on weekdays. He gathered the following sample i