For the following contingency table, calculate the observed and expected frequencies and the chi-square statistic. State and test the appropriate hypotheses at the 0.05 signifi cance level.
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Problem-58: Chi-Square and Analysis of Variance
Problems: Chi-Square and Analysis of Variance
Problem-01: Chi-Square and Analysis of Variance
A brand manager is concerned that her brand’s share may be unevenly distributed through-out the coun...
Problem-02: Chi-Square and Analysis of Variance
A brand manager is concerned that her brand’s share may be unevenly distributed through-out the coun...
Problem-03: Chi-Square and Analysis of Variance
An advertising firm is trying to determine the demographics for a new product. They have randomly se...
Problem-04: Chi-Square and Analysis of Variance
Develop a table of observed and expected frequencies for this problem.
Problem-05: Chi-Square and Analysis of Variance
An advertising firm is trying to determine the demographics for a new product. They have randomly se...
Problem-06: Chi-Square and Analysis of Variance
An advertising firm is trying to determine the demographics for a new product. They have randomly se...
Problem-07: Chi-Square and Analysis of Variance
To see whether silicon chip sales are independent of where the U.S. economy is in the business cycle...
Problem-08: Chi-Square and Analysis of Variance
To see whether silicon chip sales are independent of where the U.S. economy is in the business cycle...
Problem-09: Chi-Square and Analysis of Variance
A financial consultant is interested in the differences in capital structure within different firm s...
Problem-10: Chi-Square and Analysis of Variance
A newspaper publisher, trying to pinpoint his market’s characteristics, wondered whether newspaper r...
Problem-11: Chi-Square and Analysis of Variance
An educator has the opinion that the grades high school students make depend on the amount of time t...
Problem-12: Chi-Square and Analysis of Variance
At the 0.10 level of signifi cance, can we conclude that the following 400 observations follow a Po...
Problem-13: Chi-Square and Analysis of Variance
After years of working at a weighing station for trucks, Jeff Simpson feels that the weight per truc...
Problem-14: Chi-Square and Analysis of Variance
Below is an observed frequency distribution. Using a normal distribution with μ = 5 and σ = 1.5,
Fi...
Problem-15: Chi-Square and Analysis of Variance
At the 0.05 level of signifi cance, can we conclude the following data follow a Poisson distribution...
Problem-16: Chi-Square and Analysis of Variance
Louis Armstrong, salesman for the Dillard Paper Company, has five accounts to visit per day. It is s...
Problem-17: Chi-Square and Analysis of Variance
The computer coordinator for the business school believes the amount of time a graduate student spen...
Problem-18: Chi-Square and Analysis of Variance
In order to plan how much cash to keep on hand in the vault, a bank is interested in seeing whether ...
Problem-19: Chi-Square and Analysis of Variance
The post offi ce is interested in modeling the mangled-letter problem. It has been suggested that an...
Problem-20: Chi-Square and Analysis of Variance
A state lottery commission claims that for a new lottery game, there is a 10 percent chance of getti...
Problem-21: Chi-Square and Analysis of Variance
Dennis Barry, a hospital administrator, has examined past records from 210 randomly selected 8-hour ...
Problem-22: Chi-Square and Analysis of Variance
A large city fire department calculates that for any given precinct, during any given 8-hour shift, ...
Problem-23: Chi-Square and Analysis of Variance
A diligent statistics student wants to see whether it is reasonable to assume that some sales data h...
Problem-24: Chi-Square and Analysis of Variance
A supermarket manager is keeping track of the arrival of customers at checkout counters to see how m...
Problem-25: Chi-Square and Analysis of Variance
A professional baseball player, Lon Dakestraw, was at bat fi ve times in each of 100 games. Lon clai...
Problem-26: Chi-Square and Analysis of Variance
A study compared the number of hours of relief provided by five different brands of antacid administ...
Problem-27: Chi-Square and Analysis of Variance
Three training methods were compared to see whether they led to greater productivity after training....
Problem-28: Chi-Square and Analysis of Variance
The following data show the number of claims processed per day for a group of four insurance company...
Problem-29: Chi-Square and Analysis of Variance
Given the measurements in the four samples that follow, can we conclude that they come from populati...
Problem-30: Chi-Square and Analysis of Variance
The manager of an assembly line in a clock manufacturing plant decided to study how different speeds...
Problem-31: Chi-Square and Analysis of Variance
We are interested in testing for differences in the palatability of three spicy salsas: A, B, and C....
Problem-32: Chi-Square and Analysis of Variance
The supervisor of security at a large department store would like to know whether the store apprehen...
Problem-33: Chi-Square and Analysis of Variance
An Introduction to Economics course is offered in 3 sections, each with a different instructor. The ...
Problem-34: Chi-Square and Analysis of Variance
The manufacturer of silicon chips requires so-called clean rooms, where the air is specially filtere...
Problem-35: Chi-Square and Analysis of Variance
A lumber company is concerned about how rising interest rates are affecting the new housing starts i...
Problem-36: Chi-Square and Analysis of Variance
Genes-and-Jeans, Inc., offers clones of such popular jeans as Generic, DNA, RNA, and Oops. The store...
Problem-37: Chi-Square and Analysis of Variance
The Government Accounting Office (GAO) is interested in seeing whether similar-sized offices spend ...
Problem-38: Chi-Square and Analysis of Variance
In Bigville, a fast-food chain feels it is gaining a bad reputation because it takes too long to ser...
Problem-39: Chi-Square and Analysis of Variance
LWP is a large multinational company, having more than 2000 employees under its payroll. The managem...
Problem-40: Chi-Square and Analysis of Variance
The standard deviation of a distribution is hypothesized to be 50. If an observed sample of 30 yield...
Problem-41: Chi-Square and Analysis of Variance
Given a sample standard deviation of 6.4 from a sample of 15 observations, construct a 90 percent co...
Problem-42: Chi-Square and Analysis of Variance
MacroSwift has designed a new operating system that will revolutionize the computing industry. The o...
Problem-43: Chi-Square and Analysis of Variance
MacroSwift has designed a new operating system that will revolutionize the computing industry. The o...
Problem-44: Chi-Square and Analysis of Variance
A psychologist is aware of studies showing that the variability of attention spans of 5-year olds ca...
Problem-45: Chi-Square and Analysis of Variance
In checking its cars for adherence to emissions standards set by the government, an automaker
measu...
Problem-46: Chi-Square and Analysis of Variance
A bank is considering ways to reduce the costs associated with passbook savings accounts. The bank h...
Problem-47: Chi-Square and Analysis of Variance
Sam Bogart, the owner of the Play-It-Again Stereo Company, offers 1-year warranties on
all the ster...
Problem-48: Chi-Square and Analysis of Variance
For two populations thought to have the same variance, the following information was found.
A sampl...
Problem-49: Chi-Square and Analysis of Variance
In our study of comparisons between the means of two groups, it was noted that the most
common form...
Problem-50: Chi-Square and Analysis of Variance
From a sample of 25 observations, the estimate of the standard deviation of the population
was foun...
Problem-51: Chi-Square and Analysis of Variance
Mr. Raj, an investor, has narrowed his search for a mutual fund down to the Oppy fund or the
MLPFS ...
Problem-52: Chi-Square and Analysis of Variance
An insurance company is interested in the length of hospital-stays for various illnesses. The
compa...
Problem-53: Chi-Square and Analysis of Variance
Nation’s Broadcasting Company is interested in the number of people who tune in to their hit
shows ...
Problem-54: Chi-Square and Analysis of Variance
The HAL Corporation is about to unveil a new, faster personal computer, PAL, to replace its
old mod...
Problem-55: Chi-Square and Analysis of Variance
Two brand managers were in disagreement over the issue of whether urban homemakers had
greater vari...
Problem-56: Chi-Square and Analysis of Variance
Two competing ice cream stores, Yum-Yum and Goody, both advertise quarter-pound scoops
of ice cream...
Problem-57: Chi-Square and Analysis of Variance
The post office is concerned about the variability in the number of days it takes a letter to go
fr...
Problem-58: Chi-Square and Analysis of Variance
For the following contingency table, calculate the observed and expected frequencies and the
chi-sq...
Problem-59: Chi-Square and Analysis of Variance
Marketers know that tastes differ in various regions of the country. In the rental car business,
an...
Problem-60: Chi-Square and Analysis of Variance
What probability distribution is used in each of these types of statistical tests?
(a) Comparing tw...
Minhajur Rahaman
