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Chi-Squared Test

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

Statistics: Test significance of red uniforms vs blue in amount of wins

The color red is often associated with anger and male dominance. Based on this observation, Hill and Barton (2005) monitored the outcome of four combat sports (boxing, tae kwan do, Greco-Roman wrestling, and freestyle wrestling) during the 2004 Olympic games and found that participants wearing red outfits won significantly more

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

Calculation of Chi Square Test for Goodness of Fit

The student population at the state college consists of 55% females and 45% males. a) The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males. Is the gender distribution for the theat

Chi-Square Hypothesis Test: Male and Female IQ Scores

Research results suggest that IQ scores for boys are more variable than IQ scores for girls (Arden & Plomin, 2006). A typical study looking at 10-year-old children classifies participants by gender and by low, average, or high IQ. Following are hypothetical data representing the research results. Do the data indicate a significa

Analysis of variance and confidence interval, chi-square

Out of the 15 study problems I am having trouble with 6. I want to compare my answers to yours. Can you please work the following problems, explaing how you got the answer and showing the tables from excel, please. It is very important I understand how you got the answers. 1. A sample of the reading scores of 25 sixth-grad

Chi-square, Correlation, Multiple Regression

See attached files. 1. A study indicated where different age groups primarily get their news: At the 0.05 level of significance, is there evidence of a significant relationship between the age group and where people primarily get their news? If so, explain the relationship Use the Chi Square file

Chi square test: Smoking vs Tumour Index

Cross tabulate and do a chi-square test on the following. Is there a relationship between the two variables given? Test at the level of alpha = 0.01. Why is Chi square appropriate here? Show all working. Smoking vs Tumour Index Smoking Non-smoker=0 Smoker=1 1 0 1 0 1 1 0 1 1 0 1 0 0 0 0 1 1 1 1 1 0 0

Magazines, Reject Independence of Price and Longevity

One study looked at of 234 magazines. Two pieces of information were collected on each -- its cover price and whether it continued to be published. The table below summarizes the data in a 4X2 contingency table. Notice that the last two rows suggest that the higher priced publications are more likely to survive. Can the apparent

Chi Square Test for Association: Food Preference

A statistician is interested in determining whether food preferences depend on the country. The data is presented below. a) What is the correct statistical test for analyzing the data? b) Identify the null and alternate hypotheses and conduct all appropriate analyses (use spss if you want) c) Write a summary of your findi

Statistical test for preference of fast food place

510 people were asked which of four fast food restaurant were their favorite. Determine if there is a preference for any one place over any other. McDonald's: 155 Wendy's: 130 Taco Bell: 115 Arby's: 110 Which statisical procedure should be used?

Chi-square test on college credits

Observed frequencies Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total 0-9 12 8 3 23 10-59 8 4 9 21 60 or more 1 7 12 20 Col Total 21 19 24 64 Step 1: State the null and alternate hypotheses H₀: Degree of certainty is independent of credits earned H₁: Degree of cer

Statistics: Real-Life Chi-square Testing with Pearson's

Also find the tables attached. Answer 2: I understand you want help only on Questions 2 and 3. I will provide the solution but know that you need help on the other parts including question 1. Solution: Expected Freq = n*p(since we are dealing with a binomial distribution). The probability is 1/5 for all options. Thus,

Hypothesis Testing Exercises

15.18 - Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At alpha = .01, is the degree of certainty independent of credits earned? Certainty Credits Earned Very Uncertain Somewhat C

Determine whether Independent

Problem 4 One of the questions on a recent Business Quarterly subscriber study was, "In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?" The data obtained are shown in the Excel worksheet Problem 4 and below. You are to test to determine if the type of ticket and the t

Chi-Square Hypothesis Test

Each year, the National Highway Traffic Safety Administration (NHTSA) together with the National Center for Statistics and Analysis (NCSA) publishes Traffic Safety Facts, which summarizes the motor vehicle traffic crash experience for the United States. Traffic Safety Facts 2001 includes trend data, crash data, vehicle data,

Chi-Square Test: Do Olympic participants wearing red win more often?

The color red is often associated with anger and male dominance. Based on this observation, Hill and Barton (2005) monitored the outcome of four combat sports (boxing, tae kwan do, Greco-Roman wrestling, and freestyle wrestling) during the 2004 Olympic games and found that participants wearing red outfits won significantly more

Statistics: Marriage and Surnames

Research has demonstrated that people tend to be attracted to others who are similar to themselves. One study demonstrated that individuals are disproportionately more likely to marry those with surnames that begin with the same last letter as their own (Jones, Pelham, Carvallo, & Mirenberg, 2004). The researchers began by looki

Hypothesis Testing for the Motor Vehicle Department

Data from the Motor Vehicle Department indicate that 80% of all licensed drivers are older than age 25. a. In a sample of n=60 people who recently received speeding tickets, 38 were older than 25 years and the other 22 were age 25 or younger. Is the age distribution for this sample significantly different from the distributio

Chi Square Test: Channel Viewers & Cell Categories

See attached file. There are 2 problems. Type in formula used for each problem and show all calculations. If you use Excel or other software, you must embed them into the applications and not send as a separate attachment. Use the five step hypothesis testing process for Parts B and C.

Level of Significance

1. The Safety Director of Honda USA took samples at random from the file of minor accidents and classified them according to the time the accident took place. The sample data is as follows: 8am to 9am 6 accidents 9am to 10 am 6 accidents 10am to 11 am 20 accidents 11am to noon 8 accidents Noon to 1p

Pivot Table and Chi Square Hypothesis Test

Using the "Cumba" database file, create a pivot table of management level versus gender. Then copy the data from the table into a chi square table to see if a relationship exists between employee genders and their management level. What can you conclude at the .05 significance level? Salary (dollars) Gender Age (years