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Manuel is a high school basketball player. He is a 70% free throw shooter. That means his probability of making a free throw is 0.70. What is the probability that Manuel makes his first free throw on his fifth shot?
Compute the probability that exactly five students are left-handed.
A light-bulb manufacturer advertises that the average life for its light bulbs 900 hours. A random sample of 10 of its light bulbs resulted in the following lives in hours. At the 10% significance level, do the data provide evidence that the mean ..
Little Kona is a small coffee corporation that is planning entering a market dominated through Big Brew. Each corporation's profit depends on whether Little Kona enters and whether Big Brew sets a high price or a low price.
An instructor claims the average time to take a statistics test is more than 39 minutes. If a sample of 33 students took 43 minutes, is the instructor's claim true? Test at the 0.05 level.
The quarterly returns for a group of 69 mutual funds with a mean of 2.3% and a standard deviation of 5.9% can be modeled by a normal model. Based on the model N(0.023, 0.059), what are the cut off values for the:
A telemarketing firm in a certain city uses a device that dials residential telephone numbers in that city at random. Of the first 100 numbers dialed, 51% are unlisted. This is not surprising because 48% of all residential phone numbers in this ci..
A famous hypnotist performs to a crowd of 350 students and 180 non-students. The hypnotist knows from previous experience that one half of the students and two third on the non-students are hypnotizable.
In a public opinion poll, 48% of 189 respondents favor an elimination of taxes on dividend income.
The spell-checker in a desktop publishing application may not catch all misspellings (e.g. their, there) or correctly interpret the spellings of proper names.
Nine randomly selected statistics quiz scores are listed below. Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9. 15,18,10,19,11,12,15,17,15
A 5-card poker hand is said to be a full house if it consists of 3 cards of the same denomination and two other cards of the same denomination(of course,different from the first denomination). How many hands of full house are possible?
Assume that there are 10 pencils available of each color, and different children are allowed to choose the same color.
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