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Suppose that since the early 1950s some ten-thousand independent UFO sightings have been reported to civil authorities. If the probability that any sightings is genuine is on the order of one in one hundred thousand, what is the probability that at least one of the ten-thousand was genuine?
What should the warranty period be to replace a malfunctioning calculator if the company does not want to replace more than 1% of all the calculators sold.
hours of television watched per day is 1.6 and a random sample of 225 Egyptians is selected, the mean of this sample belongs to a sampling distribution. What is the shape of this sampling distribution? Why?
While taking a multiple choice test, I realize I cannot answer the 5 questions without guessing. There are 5 choices for each question, A B C D or E.
Using Sally's estimate of demand that follows, how many T-shirts should she produce for the upcoming event?
A study of 200 commercial firms revealed the data below. What is the probability that a particular firm will have $1 million or more in income after taxes?
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
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?
The correlation between IQ and the verbal SAT score among the seniors at GWB High School is .90; it is significant. The mean IQ is 100 with a standard deviation of 10.
A sample of size 9 is drawn at random from a Normal distribution. The experiment has a null hypothesis of μ = 0 and an alternate hypothesis of μ > 0. The mean of the sample is 7 with an s of 8. Is there a difference at the 1% level?
Estimating the individual score using normal distribution - blood pressure higher than what amount?
In both cases, give a number of data points, n, and a correlation coefficient, r. Draw a number of data points, n, and a correlation coefficient, r. Tell whether the correlation is significant at 0.05 or 0.01 level, explain.
given the amount of vitamin c in a medium orange is normally distributed with a mean of 70mg and a standard deviation
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