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A newspaper is conducting a statewide survey concerning the race for governor. The newspaper will take a simple random sample of n registered voters and determine X = the number of voters that will vote for the Democratic candidate. Is there evidence that a clear majority of the population will vote for the Democratic candidate? To answer this, they will test the hypotheses H0: p = 0.50 versus Ha: p > 0.50. If n = 1200 and X = 640, what is the P-value for this hypothesis test?
The test results are shown below. At a = 0.05, can it be concluded that the book scores are higher than the DVD scores?
researchers at the university of pennsylvania school of medicine have determined that children under 2 years old who
astudy of 31000 hospital admissions in new york state found that 4 of the admissions led to treatment-caused injuries.
when a newspaper article reports the results of a study and draws a conclusion without stating if the results are
what is the value of y when x 3 if the equation of the regression line is y 23.1 - 3.8x ?a. 4.73b. 5.29c. 34.5d.
A sample of 25 concession stand purchases at the May 12 matinee of Spider-Man 3 showed a mean purchase of $ 7.29 with a standard deviation of $ 3.02. For the May 18 evening showing of the same movie.
The director for training at a company that manufactures electronic equipment is interested in determining whether different training methods have an effect on the productivity of assembly line employees.
A college is considering making the purchase of a laptop computer a requirement for some of its programs. In the past, only 20% of students owned laptop computers. A random sample of 300 students revealed that 77 of them had laptop computers
Calculating the probability of all of them getting to their destination on time. Choose the best answer of the following: This is an example of a Poisson probability experiment
what is distribution variability and how is it linked to accuracy of statistical
Use an alpha level of .01 and test the hypothesis that the two methods are producing the same mean.
The weights of domestic, adult cats are normally distributed with a mean of 10.42 pounds and a standard deviation of 0.87 pounds. A cat food manufacturer sells three types of foods for underweight, normal, and overweight cats.
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