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# Chi-Squared Test

### Chi square test in different practical applications

1. 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 Certain Ve

### Relationship between job pressure and age

A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information. At the .01 significance level, is there a relationship between job pressure and age? Degree of Job Pressure Age (years) Low Medium

### Confidence Interval and Hypothesis Testing

#7: In a test of the quality of two television commercials, each commercial was shown in a separate test area six times over a one-week period. The following week a telephone survey was conducted to identify individuals who had seen the commercials. Those individuals were asked to state the primary message in the commercials.

### Relationship correlation - A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information. At the .01 significance level, is there a relationship between job pressure and age?

A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information. At the .01 significance level, is there a relationship between job pressure and age?

### Test of hypothesis using chi-square test

For many years TV executives used the guideline that 30 percent of the audience were watching each of the prime-time networks and 10 percent were watching cable stations on a weekday night. A random sample of 500 viewers in the Tampa-St. Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the ABC a

### Chi square test for sports

Is there an association between ethnic background and interest in sports in the population ? Can you say anything else about this relationship? ETHNICITY EUROPEAN ASIAN AFRICAN OTHER TOTAL YES

### ANOVA and Chi square analysis

Attached are two subject problems for review and completion. Please use MS EXCEL application to make the computations. treatment 1 // treatment 2 // treatment 3 8 3 3 6 2 4 10 4 5 9 3 4 Test the hypothesis that the treatment means are equal. Use the .05 significance level. 1 state the null and the alternate hypoth

### Can people really identify their favorite brand of cola? ...

Can people really identify their favorite brand of cola? Volunteers tasted Coca-Cola Classic, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research question: At &#945; = .05, is the correctness of the prediction different for the two types of cola drinkers? Could you identify your favorite brand in this kin

### CHi Square test for independence .

In a study of childhood asthma, 4,317 observations were collected on education and smoking during pregnancy. Research question: At &#945; = .005, is smoking during pregnancy independent of education level?

### Hypothesis Testing using Chi-square

A researcher selected a sample of 50 residents from each of three different cities to determine if they were willing to participate in a medical experiment. At a = .05, test the claim that the proportions who will participate are equal. Residents City 1 City 2 City 3 Willing to participate 20

### Chi square test

A chewing gum manufacturer wishes to determine if his customers prefer one flavor gum to any other flavor. He selects a random sample of customers and records the flavor of gum that is purchased. Determine the test value for the data given. Type Number Sold Spearmint 25 Wintergreen 32 Cherry

### Hypothesis Testing using Chi Square test of independence

This table lists the sugar content of two types of apples from three different orchards. At a=.05, test the claim that the sugar content of the apples and the orchard where they were grown are not related. Sugar Content Orchard 1 Orchard 2 Orchard 3 Apple Type 1 3 2 7 Apply type 2

### Expected frequency for hi square test.

An insurance representative wants to determine if the proportions of women and men who buy the different policy types are the same. The actual sales results for 50 women and 50 men are Policy A Policy B Women 18 32 Men 12 38 Under the null hypothesis, what is the expect

### For many years TV executives used the guideline that 30 percent of the audience were watching each of the prime-time networks

For many years TV executives used the guideline that 30 percent of the audience were watching each of the prime-time networks and 10 percent were watching cable stations on a weekday night. A random sample of 500 viewers in the Tampa-St. Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the

### Probability & Statistics

A college surveyed it's current students about the educational background of their parents and separated the results by program. The results are below: (see attached) Does this data provide evidence at 1% significance level that the educational attainment of their parents impacts on student's choice of program?

### Chi Square Test for Spreadsheets.

Chi Square Test with the following data (on spreadsheet). Gender Washed Hands with soap and water Washed Hands with water only Did not Wash Hands with soap or water TOTAL Women 24 5 1 30 Men 20 2 8 30 TOTAL 44 7 9 60 Specifics: The purpose of this study was to determine whether men or women washed their hands more fr

### Create a scenario for applying the Goodness of Fit application of Chi-square.

1. Create a scenario for applying the Goodness of Fit application of Chi-square. State the hypotheses, the level of significance, the result and its meaning. 2. Create a scenario for applying the Contingency Table application of Chi-square. State the hypotheses, the level of significance, the result and its meaning.

### Chi-Square - Absenteeism among assembly workers is of concern

1. Absenteeism among assembly workers is of concern. In particular, there may be a relationship between the day of the week on which absence occurs and the type of job performed by the worker. Workers are classified as skilled, semiskilled and laborer. A random sample of days absent was selected from records kept over the past

### Parametric and Nonparametric Data Identification; Chi Square

Parametric and Nonparametric Data Identification Assignment Which one of these statements are an example of parametric data or an example of nonparametric data. 1. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and

### Calculations for Statistics Problems

Use the following Scenario to answer questions 1 - 3. 1. 800 employees of OxCo Mfg. were surveyed to evaluate the company's pension plan. The table below displays some of the results of the survey. Rating of Pension Plan Years employed Excellent Good Fair Poor Row Total Under 10 yrs 24

### Questions about the chi-square (X^2) statistic

True or False 1. The X^2 test statistic is a random variable that is based on frequencies. 2. The chi-square test for independence is a non-parametric statistical test because no parameters are estimated 3. Observed frequencies in a chi-square goodness-of-fit test for normality may be less than 5 or even 0 in some cells

### The data provided supposedly are well described by the curve, y=ax^2 +bx + c. a. Find the best fit of the data to the curve. b. Comment on the goodness of fit you achieved.

*** Please see attached file. *** a. Find the best fit of the data to the curve. y x 0 5.1 1 10.9 2 21.2 3 34.7 4 53.5 5 76.0 b. Comment on the goodness of fit you achieved.

### Chi Square Test

1. Calculate the average number of each color you have in the bags. (I had 5 different colors and the average number in my 10 bags is 54). 2) Then using a chi square test - compare it to the expected value - which will be the average number in the bags divided by the number of colors you have. Use the chi square formula the

### Hypothesis test to determine M&M distribution by color is uniform.

To continue with the data from DE#2. Perform a hypothesis test to determine if the M&M distribution by color is uniform. Set up the null and alternative hypothesis, prepare a table to calculate the Chi-square test statistic, calculate the number of degrees of freedom, look up Chi-square for the critical value, set the level of

### Parametic and Nonparametric Data Identification Students in an introductory college economics class were asked how many credits they had earned in college

Do not understand how to calculate and the concept behind these computations. See the attached file. 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 &#945; = .01, is the degree of certainty

### Statistics - Hypothesis test - Chi Square test

Please see attached file with two questions with charts. Thank you! Here we examine the relationship between social class and spending on welfare and education. Lower Class Working Class Middle Class Upper Class Spending on welfare Too little 18 59 73 4 About right 12 109 132 10 Too much 16 142 121 12 Total

### Basic Statistics and Probability Institutions

Hi, Would like some assistance with the following statistics problems in the attachment. Thanks. 1. The UAA Writing Institute finds that 30% of the general population in Alaska is left handed. a. If 6 people are randomly selected, find the probability that between 3 and 5 are left handed. b. If 6 people are rando

### Testing of Hypothesis for Variance with P-Value Method

A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance? Use the p-value method.

### What Are the Hypotheses in a Chi-Square Test for Independence?

i. What are the hypotheses in a chi-square test for independence? ii. Why do we call it a test of frequencies? iii. What distribution is used in this test? iv. How do we calculate the degrees of freedom for an r °? For a c contingency table? Your response to this question should also include an example from your professio

### At a 0.10 level of significance what are the critical boundaries for rejecting H0: s = 12?

The owner of an Internet video supplier, Netflix, has conducted a study of the habits of online customers. In particular she wants to estimate the average number of videos checked out each month. Before she can determine the sample size she will need, she needs to make an estimate of the standard deviation. On the basis of her p