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The Employment and Training Administration reported the U.S. mean unemployment insurance benefit of $238 per week (The World Almanac 2003)
Heights were measured for a random sample of 20 plants grown while being treated with a particular nutrient. The sample mean and sample standard deviation
The average monthly cot for a studio apartment in NYC is reported to be $1,000. You want to prove that average monthly rent is not what is stated.
A doctor suspected that smokers between 40 and 50 with lung disease had been smoking on average more than 20 years
Given the following data from two independent data sets, conduct a one-tail hypothesis test to determine if the means are statistically equal using alpha=0.05.
A survey was conducted to compare the proportion of male and female adults, 25 years or older, who have completed four or more years of college
A machine is adjusted so that when under control, the amount of sugar filled in a bag is normally distributed with a mean amount of 5 pounds
Formulate a hypothesis statement regarding the research issue.
A new car is designed to run a mean of at least 50 000 kilometers before its first tune-up. Tests with 30 cars show a sample mean of 49 500 kilometers
A random sample of nine tempered couplings has a standard deviation of 13.1 megapascals, and a similar sample of nine nontempered coupling
During the past three (May, June and July) a vast amount of employees been absent from Greg's Grand Corporation
Perform hypothesis testing on one variable's data(choose either the intrinsic or extrinsic Job Satisfaction)using 25 as our data set number
Decide on an issue that you wish to investigate and obtain the sample data that you will use.
Chrysler Corporation agrees to allow you to randomly select 40 of its new Dodge Caravans to test the highway mileage
The team determined that to confirm the validity of their screening experiment they should compare the test score results for some students
The Non-Profit Times conducted a random sample of 126 U.S. non-profit companies at the beginning of 2005.
Periodically, Merrill Lynch customers are asked to evaluate Merrill Lynch financial consultants and services (2000 Merrill Lynch Client Satisfaction Survey)
Birdie Golf Equipment is a major manufacturer of golf equipment. Management believes that that Birdies market share could be increased with the introduction
The average price of regular gasoline in the continental US states and the District of Columbia was $3.74 on August 18, 2008
In a certain county, two candidates are running for a county office. A couple of hours into the voting, a thousand of the votes cast have been counted
A political action committee decided to poll its membership to determine if they were in favor of a certain potential law, similar to gun control
Suppose a new production system will be implemented if a hypothesis test support the conclusion that the new system increase production.
Annual family dental expenses for the families of a random sample of ten employees of a company are given below. You can assume the family dental expenses
The Dick Tracy Co. has developed micro-miniaturized circuitry that will enable them to produce a wristwatch-sized video-telecommunicator.
Political polls typically sample randomly from the U.S population to investigate the percentage of voters who favor some candidate or issue.