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The power failures of experienced by the Columbia Power Company conform to a Poisson distribution with a mean of u = 0.18 failures per day. What is the probability that their customers will get two or more power failures in one day?
If a particular shipment of thousands of components actually has a 6 percent rate of defects, what is the probability that this whole shipment will be accepted?
A newspaper conducted a statewide survey concerning a proposal to raise taxes to prevent budget cuts to education. The newspaper took a random sample (assume it is an SRS) of 1200 registered voters and found that 580 would vote to raise taxes. Let..
waiters at finegolds restaurant and lounge earn most of their income from tips. each waiter is required to tip-out a
The population standard deviation is known to be 8 minutes. create a hypothesis test to determine if the mean commute time does in fact exceed 40 minutes.
1.using your own words what is statistical variability? why is it important for researchers to understand the
the estimate of the population proportion is to be within plus or minus .04 with a 98 percent level of confidence. the
Random Sample: Before you begin your analysis you are required to take a random sample of size 110 from the 170 cases in the file. Use the file Random_Sample_Generator-13-2.xls to do this.
the scholastic aptitude test sat is standardized to be normally distributed with a population mean of 500. a parent is
A player of a video game is confronted with a series of opponents and has an 80% probability of defeating each one. Success with any opponent is independent of previous encounters. The player continues to confront opponents until defeated.
Finds the average life time for this sample is 970 hour and the standard deviation is 80 hours. Can the firm claim that the average life time is 1000 hours at the 5% level of significance?
Conduct a statistical test to determine if the sample is representative of the population.
You're considering paying $5 to buy a ticket in a local lottery. You were told that 10,000 tickets will be sold. There are 5 prizes. The first prize is $5,000, the second is $1,000, the third is $500, the fourth is $100 and the last prize is $10.
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