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The State of OH averages four tax evaders per 100 tax filers. If 50 tax filers are randomly selected from the state, what is the probability of the following:
Over nine filers will be tax evaders?
How can we be certain that surveys and statistics that we hear about in the media are accurate samples and unbiased? Is there a way to dissect the information and determine if a probability sample was used?
a light bulb is advertised as lasting an average of 1000 hours with a standard deviation of 150 hours. find the
Using data provided, test if there is a difference between means at alpha =.05.
question a night time cold medicine bears a label indicating the presence of 600 mg of acetaminophen in each fluid
question dr. patton is a professor of english. recently she counted the number of misspelled words in a group of
A leasing firm claims that the mean number of miles driven annually,u , in its leased cars is less than 13500 miles. A random sample of 70 cars leased from this firm had a mean of 13207 annual miles driven.
the scores on an old pinball machine located in the basement of the student center are normally distributed with a mean
A random sample of 200 workers from Factory A showed that 130 were satisfied with their job. Formulate and test the appropriate hypotheses at the 1% level of significance
americans have become increasingly concerned about the rising cost of medicare. in 1990 the average annual medicare
The number of hours a 100 watt bulb will operate before burning out is approximately normally distributed with standard deviation σ=50.
Determine the probability that none of the 20 disjoint intervals Ij will contain more than one of the random variables X1...X12.
There are three flight phases. At α = 0.05, is the cockpit noise level independent of flight phase?
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