### Chi-square analysis

What is an example in the world around you for which you would use a Chi-square analysis? (Answer provided in less than 100 words.)

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What is an example in the world around you for which you would use a Chi-square analysis? (Answer provided in less than 100 words.)

See the attached file. A study was done on the accuracy of newspaper advertisements by the five types of food stores in a southeastern city. On each of four days, items were randomly selected from the advertisements for each type of store and the actual price was compared to the advertised price. Each of the stores in the city

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 -

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 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

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

What is an example in the world around you for which you would use a Chi-square analysis?

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

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

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

A person randomly selected 100 checks and recorded the cents portions of those checks. The table below lists those cents potions categorized according to the indicated values. Use a 0.10 significance level to test the claim that the four categories are equally likely. The person expected that many checks for whole dollar amounts

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.

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

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

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?

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

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.

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

What are the chi-square goodness-of-fit test and the independent t-test actually measuring? What are the major differences between each of these approaches?

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?

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

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

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

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

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

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

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

A human resource manager is interested in whether absences occur during the week with equal frequency. The manager took a random sample of 100 absences and created the following table: Monday 28 Tuesday 20 Wednesday 12 Thursday 18 Friday 22 At a significance level of alpha = .05 test the

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

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