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Chi-Squared Test

Chi Square Goodness of Fit Hypothesis Test

Please go to the website given below to answer and solve the following assignment: 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

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

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

Statistics: 234 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

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

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

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

Statistics: 3 Problems

1. Big Mountain Power Company serves a region in which the following amounts of electricity are used annually (in millions of kilowatt hours). Year Consumption 1999 352 2000 357 2001 362 2002 369 2003 380 2004 382 2005 389 2006 391 2007 394 2008 405 a) Plot the data. b) Determine the regression equation and

Hypothesis testing problems related to ANOVA, t test, Chi- square

All of these questions are for my stat's class. I am having a really hard time understanding what needs to be done. I really want to learn what is going on.. I have double the amount of homework than the questions below. I went ahead and took one question from each section to get help with so I can see how to get the answers and

Statistics: Test a Claim about a Standard Deviation or Variance in pulse rates

See attached file. Pulse Rates of Men - A simple random sample of 40 men results in a standard deviation of 11.3 beats per minute (based on data set attached). The normal range of pulse rates of adults is typically given as 60 to 100 beats per minute. If the range rule of thumb is applied to that normal range, the result is a

Chi-square Test: Allergic reactions

Langewitz, Izakovic, and Wyler (2005) reported that self-hypnosis can significantly reduce hay fever symptoms. Patients with moderate to severe allergic reactions were trained to focus their minds on specific locations where their allergies do not bother them, such as a beach or a ski resort. In a sample of 64 patients who recei

Chi-Squared Test: Gender Distribution in College

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 theater

Hypothesis Testing: Chi-square Test for Variance

3. A survey of 30 students at a local college found that the sample mean number of hours worked by students is 17 hours per week with a sample standard deviation of 2 hours. Use a 0.05 significance level to test the claim that the sample students come from a population with a standard deviation of 3 hours. (Assume that the sa

Chi-square test for independence .

Employees of Axolotl Corporation were sampled at random from pay records and asked to complete an anonymous job satisfaction survey, yielding the tabulation shown. Research question: At alpha = .05, is job satisfaction independent of pay category? Pay Type Satisfied Neutral Dissatisfied Total Salaried 20 13

Chi square: Is the cockpit noise level independent of flight

High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 decibels), "Medium" (88 to 91 decibels), or "High" (92 decibels or more). There

Hypothesis Test: Chi-Square Test of Variance

Hypothesis Test: Null: "Older people are more likely to buy American cars than younger people." Alternative: "Older people are not more likely to buy American cars than younger people." (please refer to the attachment for data) 1. State the null and alternate hypothesis. 2. Select the level of significance - the alpha

Chi-square Test-Home team advantage in football games

To investigate the phenomenon of "home team advantage" a researcher recorded the outcomes from 64 college football games on one Sat. Of the 64 games, 42 were won by home teams. Does this result provide enough evidence to conclude that home teams win significantly more than would be expected by chance? Assume that winning and los

Chi square statistic: Test for goodness of fit & independence; heart disease

Help needed for chi square statistic on this problem: A study suggested that personality type is related to heart disease. Specifically, type A people,who are competitive, driven, pressured, and impatient, are more prone to heart disease. Suppose that an investigator would like to examine the relationship between personality

Chi Square Test of Variance of Independent and Dependent Samples

Question 1 A bar owner is interested in customer preference for three (3) different brands of beer: Molson's, Corona, and Guinness. One hundred twenty customers are randomly selected and are asked to taste each beer and indicate their preference. The population from which the customers were drawn showed no particular preference