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Does Lovastatin reduce the risk of heart attack? In texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2081 people.
In testing the hypothesis, H0: u _> 28.7 and Ha: u < 28.7, using the p-value approach, a p-value of 0.0764 was obtained
The following results are for two independent samples taken from the two populations.
In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children
It has been claimed that the mean age of all FHSU Virtual College statistics students is at most 30 years old. Using the age data collected from this class
Because of the expense involved, car crash tests often use small samples. When five BMW cars are crashed under standard conditions, the repair costs
The executive committee has learned that the average salary for executives in the industry is $140,000, and the committee is concerned
In a recent year, some professional baseball players complained that umpires were calling more strikes than the average rate of 61.0% called the previous year
A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking.
A medical school claims that more than 28% of its students plan to go into general practice.
66% of students at a university live on campus. A random sample found that 20 of 40 male students and 40 of 50 of female students lived on campus
A researcher wanted to determine if using an octane booster would increase gasoline mileage. A random sample of seven cars was selected
Does lovestain (a cholesterol lowering drug) reduce the risk of heart attack? In a Texas study researchers gave lovestain to 2,325 and an inactive substitute
A random sample of 5 observations from the first population resulted in a standard deviation of 12. A random sample of 7 observations from the second population
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.