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A fair coin is tossed four times. What is the probability that the number of heads appearing on the first two tosses es equal to the number of heads appearing on the second two tosses?
An economics course are independent events, what is the probability that a randomly selected student is registered in either a math course or an economics course?
How would you define Incidence Rate
one-way analysis of variance anova test.the following is a partial anova table.sourcesum of squaresdfmean
Test the claim that the proportion of students in this district who use computers in school is at least 80%. State the correct hypotheses.
What is the probability that they all have blue eyes? Would it be unusual to randomly select four people and find that they all have blue eyes? Why or why not?
A random sample of 49 employees took a computer literacy test. The sample resulted in a mean score of 75 with a standard deviation of 21. Develop an approximate 95% confidence interval for the population mean of the 600 employees.
An experiment is designed to test the potency of a drug on 20 rats. Previous animal studies have shown that 10-mg dose of the drug is lethal 5% of the time within the first 4 hours; of the animals alive at 4 hours, 10% will die in the next 4 hours..
WLD Incorporated, a national data-collection agency, estimates that 55% of all customers at home warehouse stores (in the United States) own their own home.
The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 families, neither father nor son attended college; in 12 families,..
A recent study of 50 self-service gasoline stations in the Greater Cincinnati' Northern Kentucky metropolitan area revealed that the mean price of unleaded gas was $2.029 per gallon. The sample standard deviation was $0.03 per gallon.
A random sample of 81 credit sales in a department store showed an average sale of $68.00. From past data, it is known that the standard deviation of the population is $27.00.
Mean 52 and standard deviation 7; N(52, 7). According to the 68-95-99.7 rule, what percentage of jazz CDs play between 38 and 59 minutes?
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