Non-parametric statistics and Chi-Square Test
1. What are the assumptions that must be met for non-parametric statistics? 2. What are the positives and the negatives of the chi-square test?
1. What are the assumptions that must be met for non-parametric statistics? 2. What are the positives and the negatives of the chi-square test?
Directions: You may include the statistical software output, but you must also include a well-written explanation of the findings. Be sure to answer the question asked in each problem, and explain why, with reference to your output. If you calculate the answers manually, be sure to show your work. I would prefer a Word document
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
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
#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.
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?
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
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
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? Volunteers tasted Coca-Cola Classic, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research question: At α = .05, is the correctness of the prediction different for the two types of cola drinkers? Could you identify your favorite brand in this kin
In a study of childhood asthma, 4,317 observations were collected on education and smoking during pregnancy. Research question: At α = .005, is smoking during pregnancy independent of education level?
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
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
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
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 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
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 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
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.
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 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
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
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
*** 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.
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
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
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 α = .01, is the degree of certainty
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
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
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.