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The random variable X, representing the number of accidents in a certain intersection in a week, has the following probability distribution:
By the third day of a particular week, 2 accidents have already occurred in the intersection. What is the probability that there will be less than a total of 4 accidents during that week?
1.00
0.70
0.50
Please show work.
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
city a has a mean family income of 65000 with a standard deviation of 2000. it also has proportion unemployed of .1. a
Tests it and then puts it to one side. this is repeated 5 times. What is the probabilty that none of the five tested were faulty?
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha :
Bolts are randomly selected until a 5 mm bolt is obtained. The outcomes are the sequences of bolts that can be selected. So one outcome is 1, and the other is 342. List the equally likely outcomes.
Calculate and compare the means for IQ as a dependent variable and gender as your independent variable. Do you think males and females differed in their IQ scores? Why?
How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test
Using classical methods discussed in class, try to estimate the probability of winning.
Individual scores of a placement examination are normally distributed with a mean of 84.2 and a standard deviation of 12.8.
If people on your floor of dorm bought 425 of those tickets, determine the probability that someone on your floor will hold winning ticket?
If he were to conduct a second study to reduce the maximum error of estimate to 6, about how many hard drives should he include in his new sample?
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