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A South American custom candy producer wants to know if the mean daily consumption of regular sugar sweetened candy eaters
Marconi Shipping Company packages their shipments in 50 ton containers. History has shown that the shipping department reports
Reis, Inc., a New York real estate research firm, tracks the cost of apartment rentals in the United States.
Below are grade point averages for 25 randomly chosen university business students during a recent semester.
A metropolitan bus system sampler's rider counts on one of its express commuter routes for a week.
The 65 students in a class at the University of Soda were given blinded evaluations of pairs of cola drinks.
A hypothesis test is used to test a claim. You get 1.75 as your test statistic and 1.59 as your critical value for a right-tailed test
What data are you going to use? What sections of the data set are you going to use? Make sure it is ratio or interval numerical data you are going to use.
One hundred people were asked which of four brands of Cola they pre-ferred. 20 preferred brand A, 31 brand 8, 28 brand C and 21 preferred brand
The web-based company Oh Baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received.
Data was collected from a random sample of eight men and 10 women currently undergoing treatment for hypertension.
A study has been made to compare the nicotine contents of two brands of cigarettes. Ten cigarettes of Brand A have an average nicotine content of 3.1 milligrams
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college
Since three are less than 30 in the sample and the population standard deviation is unknown then we will be using the T-test.
A random sample of five resulted in the following values: 18, 15, 12, 19, and 21. Using the .01 significance level, can we conclude the population mean
A neurologist wants to detect whether the mean response time for drug-injected rats differs from a control group not injected.
The following sample information shows the number of defective units produced on the day shift and the afternoon shift for a sample of four days last month.
Explain how you decide what statement goes into the null hypothesis and what statement go into the alternative hypothesis.
For a random sample of 10 observations, the sample mean was 12 and the sample standard deviation 3. Using the .05 significance level:
He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend
A police officer claims that the average speed of cars on a certain stretch of highway is greater than 70 miles per hour--thus more patrols needed.
How do you know when to perform a "left-tailed" test in a hypothesis-testing situation versus a "right-tailed" or "two-tailed" test?
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
The mean interview time for a standard questionnaire of 31.3 minutes was considered to be excessive so the schedule was revised, yielding a mean interview time
Callaway Golf Company's new forged titanium ERC driver has been described as "illegal" because it promises driving distances that exceed the USGA's standard