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
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
Question 1 Q1. DO NOT USE SPSS (except for the purpose of checking) in your answer to this question. A car insurance company wishes to investigate the risks that it is incurring when it insures customers who drive two particular types of cars. One part of this investigation is concerned with the ages of claimants. It has there
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 High Le
For many years TV executives used the guidelines that 30 percent of the audiences were watching each primetime networks and 10 percent were watching cable station 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 into the ABC affiliate
Use the given confidence level to find the 80% confidence interval for the population standard deviation. n=16, X = 66000, s= $7778 Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square dist
Please see the attached file for full problem description. 12. There are 300 welders employed at the Maine Shipyards Corporation. A sample of 30 welders revealed that 18 graduated from a registered welding course. Construct the 95 percent confidence interval for the proportion of all welders who graduated from a registered we
Hello, I have also attached this same problem in a word document. Thank you. Medical researchers followed 6272 Swedish men for 30 years to see if there was any association between the amount of fish in their diet and the incidence of prostate cancer. (The data are collected from an article in Lancet, June, 2001.) The data
1. A political science professor is interested in finding out whether there is a relation between political affiliation and attitude towards a recent Supreme Court ruling about challenges to federal affirmative-action programs. He samples a group of registered voters at random and organizes the data collated in the contingency t
Please see attached file for full problem description. Are baby boomers more likely to increase their investing now that they are reaching middle age? A poll was conducted in which 400 investors were classified according to their age group and their likely investment over the next five years versus the last five years. 200 in
In recent years, 42 percent of the American made automobiles sold in the United States were manufactured by General Motors, 33 percent by Ford, 22 percent by Damlier-Chrysler, and 3 percent by all others. A sample of the sales of American-made automobiles conducted last week revealed that 174 were manufactured by Damlier Chr
Chapter 15 - Exercises 26 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 High
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 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 affiliate,
A small management consulting firm presents both written and oral proposals in an effort to get new consulting contracts. Records indicate that the probability distribution Pxy(x,y) of X = number of oral proposals in a week and Y = number of written proposals in that week is given by the following table:
In a particular market there are three commercial television stations, each with its own evening news program from 6:00 to 6:30 P.M. According to a report in this morning's local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on WNAE (channel 5), 64 watched on WRRN (channel 11), and 33 on WSPD
See attached file for full problem description including exponentials and diagrams. --- Problem More than one teacher has given the following advice: choose answer C when blindly guessing among four answers in a multiple choice test, since C is more often the correct answer than either A, B, or D. Suppose that we take a r
(1) In a contingency table a sample of 400 people is classified by gender and hair color (4 groups: blond, brown, black, and red). How many degrees of freedom are there? A. 3 B. 8 C. 399 D. None of the above. (2) To find the expected frequency in a contingency table A. Take the square root of the degrees of freedom.
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
Conduct Chi Square Tests of Significance for the following analysis conducted by a counselor to determine help-seeking behavior across gender and social class of the clients in his clinic. Use the five-step model of hypothesis testing for each analysis. Help-Seeking Behavior Lower Class Working Class Middle Class Upper
Conduct Chi Square Tests of Significance for the following analysis conducted by a counselor to determine help-seeking behavior across gender and social class of the clients in his clinic. Use the five-step model of hypothesis testing for each analysis. Help-Seeking Behavior Male Female No 309
1) A consumer organization wants to know whether there is a difference in the price of a particular toy at three different types of stores. The price of the toy was checked in a sample of five discount stores, five variety stores, and five department stores. The results are shown below. Use the .05 significance level. 2) A s
Conduct Chi Square Tests of Significance for the following analyses conducted by a counselor to determine help-seeking behavior across gender and social class of the clients in his clinic. Use the five-step model of hypothesis testing for each analysis. Help-Seeking Behavior | Lower Class | Working Class | Middle Class | Uppe
The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes, the missing pants, shoes, and so on were attributed to shoplifting. For 30 other boxes employees had stolen the goods, and f
A supermarket manager believes that among the customers buying orange juice, 30% of the customers prefer Brand A, 20% prefer Brand B, and 50% prefer Brand C. Records from sales in a typical week showed the number of orange juice bottles sold is given in the following table. Brand A Brand B Brand C Total 225 15
Government Spending The 1998 General Social Survey asked a sample of adult American whether they think the federal government spends too little, the right amount, or too much money on various programs. The responses concerning the space program, categorized by political leaning, are summarized in the table below. It is though
A teacher figure that final grades in the statistics department are distributed as A,25%, B, 25%, C, 40%, D, 5%, F, 5%. At the end of the randomly selected semester, the following number grades were recorded. Use the Goodness-of-Fit test to determine if the grade distribution for the department is different than expected. Sta
1. Paramertic test (such as t or AVOVA) differ from nonparametric test (such as chi-square) primarily in terms of the assumptions they require and the data they use. Explain these differences. 2. A researcher obtained a random sample of n=60 students to determine whether there were any significant preferences among three lea
? Consider how the chi-square test of association is a nonparametric procedure that requires different assumptions. ? Give an example that would best be analyzed using this technique. ? Clearly describe the independent and dependent variables you would study. ? State the research question and statistical null and alternativ
19. In a particular market there are three commercial television stations, each with its own evening news program from 6:00 to 6:30 P.M. According to a report in this morning's local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on WNAE (channel 5), 64 watched on WRRN (channel 11), and 33 on W
10. The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes, the missing pants, shoes, and so on were attributed to shoplifting. For 30 other boxes employees had stolen the goods, a