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Chi-Squared Test

Chi-square Distribution: Finding Test Components

Question: Find the test statistic and critical value. Also use the chi-square distribution to find limits containing the p-value and then determine whether there is sufficient evidence to support the given alternative hypothesis. Precipitation amounts: - standard deviation of all values in a population does not equal 0.25 -

Crosstabs Analysis for Proportion of Students Taking Math

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and their father. Two variables are found below in the d

Hypothesis Test - Fatigue in Aviation Industry

Hypothesis testing is really a systematic way to test claims or ideas about a group or population. In hypothesis testing, data is collected to show that the null hypothesis is not true, based on the likelihood of selecting a sample mean from a population. The level of significance is typically set at 5% in behavioral research s

Chi Square Question

Can you please help me develop a research question using gender and another categorical variable associated to adhd that could be address using the chi-square method? Specify the independent and dependent variables that would be studied along with the research question, the statistical null and alternative hypotheses, an expl

The annual salaries of 16 randomly chosen actuaries are listed below

The annual salaries of 16 randomly chosen actuaries are listed below. At ? = 0.02can you conclude the standard deviation of the annual salaries is greater than $20,000? Use the P-value method to perform the hypothesis test. "69,264" "64,696" "40,288" "52,648" "92,784" "53,072" "44,272" "103,400" "46,952" "47,640" "9

Chi-Square Test for Proportions

The Chi-Square test for proportions is illustrated using the following example. During the first 13 weeks of the television season, the Saturday evening 8:00 p.m. to 9:00 p.m. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule

Data Sampling: Students Who Take Advanced Math

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and their father. Two variables are found below in the d

Example of Chi Square Table in MS Excel

Suppose you were preparing two-way tables of percentages for the following pairs of variables. How would you run the percentages? a) Age and consumption of breakfast cereal. b) Family income and confidence about the family's future. c) Marital status and sports participation. d) Crime rate and unemployment rate.

Measure of Association Computation

A research team conducted a study of soft-drink preferences among residents in a test market prior to an advertising campaign for a new cola product. Of the participants, 130 are teenagers and 130 are adults. The researchers secured the following results: Teenagers: Cola 50 Nocola 80 Adults: Cola 90 Nocola 40 C

Measuring Association for Full Time Employees

7. For full time employees only (variable wrkstat equals 1), make a crosstabulation of satjob and respondent's income in quartiles (youmust calculate this variable yourself-call it income4). For each cell, obtain the appropriate percentagess, observed and expected cell counts, and residuals. Also obtain the chi-square statistic

Similarities dissimilarities between chi-square correlation

What are the similarities and dissimilarities between a chi-square analysis and a correlation analysis? Suppose you conducted a study to see if there was an association between political party affiliation and whether or not someone voted. What type of analysis would you use and why?

Statistics

I need help figuring out how to do this assignment: Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother an

Testing Distribution of a Population by Chi-Squared Test

Test Claim M&M Candies, On Avg. they claim percentages of colors: 24% blue, 20% orange, 16% green, 14% yellow, 13% red, and 13% brown. Test the true proportion at significance level 0.05. Total number of candies in bag is 4039.

Statistics: Proving Hypothesis

Lemon Corporation, an automobile manufacturer, is trying to determine the source of defects in some of its autos. Rumor has it that on Mondays large numbers of Lemon auto workers are hung over from a weekend of drunkenness and debauchery and are, therefore, more likely to make mistakes on the job. In order to test the hypothesi

How is the chi-square test different from the goodness-of-fit test?

1) Describe the chi-square test of independence. 2) How is this test different from the chi-square goodness-of-fit test? 3) Are the assumptions underlying each of these tests the same? 4) When presented with nonparametric data how do you know which of these tests to use?

Chi-square goodness-of-fit-test vs independent t-test

This week introduces the chi-square goodness-of-fit-test, which looks for differences across independent groups. Since this is similar to the independent t-test, which looks for differences between independent groups, 1). Discuss what each of these tests is actually measuring. 2). Be sure that your discussion address

Chi-squared test and linear regression

Please help me to understand these concepts: 1. What is the null hypothesis in a chi-squared test of independence? 2. How many "tails" can a chi-squared test have, one or two? 3. In a regression analysis, what do the residuals from the fitted line add up to? 4. List the assumptions under which the linear regression model is

Crosstabs Analysis and Chi-Squares

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and their father. Two variables are found below in the d

Chi square test for association: Shopping behavior

The shopping behavior of consumers in different types of stores was studied. Data were collected on buying patterns and income levels. A cross-classification table of buying pattern versus income levels for 200 consumers in the sample is reproduced below. a. State in English the null and alternate hypothesis. b. For each

Chi-Square and GOF Tests

1.) A worker in an insurance company processes claims. The distribution of the number of claims processed each day in a week of this worker's life is as follows. Day # of Claims Monday 28 Tuesday 45 Wednesday 40 Thursday 23 Friday 29 The worker's boss thinks the worker's claims processing is sporadic and is not evenly

Chi Square Statistical Analysis

We utilize the goodness of fit test (chi square) to understand if the observed frequencies within our sample behave as expected (when compared to either a different sample of the population). Discuss where this common statistical analysis technique might be useful in your business. Is it being used already? If not, how will y

CHi-Square test for computing statistics

Week 5 homework Chi-Squares You are a general manager at a resort in Hilton Head, South Carolina. To analyze activity and sales, you are interested in studying the number of rounds of golf played by members per weekday. The following sample information is collected over 440 rounds: Day of the Week Number of Rounds M

How to use SPSS to calculate a chi-square

State the statistical assumptions for this test. Using the data set you have selected, choose independent and dependent variables. Develop the null hypothesis and the alternative hypothesis. Use SPSS to calculate a chi-square. Decide whether to reject or retain the null hypothesis. Generate syntax and output files

Chi-Square Test - Managers Dilemma of Buying Smartphones

A Managers Dilemma of Buying Smartphones The procurement manager of a large company was assigned with buying new smartphones for 500 employees. The manager sent out requests for proposals to three companies: AT&B, Horizon and E-Mobile. All three companies responded and the manager saw that he could get the best deal from Hori

Statisitcs

5. A car manufacturer has four plants, say Plants A,B,C and D. The CEO would like to know if worker ratings differ among the four plants. You (VP of HR) must decide if the workers rating differ proportionately among the plants. You randomly select 239 worker ratings from the four plants. The table below shows the number of wo

Chi square Test: Degree of Cerainty & Credits Earned

Exercise 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 a = .01, is the degree of certainty independent of credits earned?