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When writing about the probability that it will rain in Boston on July 4 of next year, a newspaper reporter states that the probability is ½, because either it will rain or it will not. Is this reasoning correct? Why or why not?
An insurance company states that the probability that a particular car will be involved in a car crash this year is 0.14, and the probability that the car will not be involved in a car crash this year is 0.82.
Decide whether the statement makes sense (or is clearly true) or doesn't make sense (or is clearly false). Justify your answer. [Note that your explanation is more important than your chosen answer.]
A research report summarizes the results of the hypothesis test by stating,"z = 2.13, p
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
Analyze the data using linear contrasts to make the following comparisons:
The U.S.Census Bureau announced that the median sales price of new homes sold i April 2009 was $221,660, and the mean sales price waas $274,300. Assume that the standard deviation of the prices is $90,000.
There are 6 children in a family. The number of children defines a population. The number of simple random samples of size 2 that are possible equals:
She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings for all 35 in Perform.
A four-year financial project is forecast to have net cash inflows of $20,000; $25,000; $30,000; and $50,000 in the next four years. It will cost $75,000 to implement the project
Employer wishes to interview only those applicants who score in top 15%. What must cut-off score be for interviews?
Four different assembly processes were under consideration. Sixteen workers were randomly assigned to the four processes, eight per process. The number of correctly assembled units in an eight-hour work shift was recorded:
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
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