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A test of sobriety involves rating of subject's motor skills. Twenty randomly chosen sober subjects take the test and produce the mean of 82 with the sample standard deviation of 12. At the .99 leve
Before endorsing candidate for political office, a newspaper editor surveys 300 randomly chosen readers and finds out that 160 favor the candidate in question. Test the editor's claim that candidate
A gasoline wholesale distributor has bulk storage tanks which hold supplies as well as are filled every Monday. Of interest to wholesaler is the proportion of this supply that is sold throughout the
The director of security for industrial site is thinking of closing one or more of site's several gates to make it simpler to control who gets in. He desires to know whether the gates are equally ut
The main office of a franchise restaurant chain desires to be capable to predict what sales may be at proposed new locations for restaurants, based upon what they've learned from their several hundr
Babsie is public affairs specialist at Park University. A press release issued by Babsie based upon some research claims that Park University students study at least as much as national average for
Buyers often insist upon discounts for large orders. Experience describes that the amount of their needed discounts ranges from 0 to 24% with uniform distribution.
An Australian Bureau of Statistics survey showed that one in six people 16 years of age or older volunteers some of his or her time. If this figure holds for the entire population and if a random sa
Mention the probability distribution of X. (Caution: what is not listed is the chance of winning nothing, but you can figure that out from the given information.)
Determine the probability that the man's and the woman's dinner cost at most $19 each? Are X and Y independent? Justify your answer.
Over many weeks of observation, the distributor found that this proportion could be well modeled by the standard beta distribution with alpha = 2 and beta = 3. Find the probability at most 88% of th
Damien is 68 inches tall. Use the equation of the regression-line exactly as given in the first question to predict the height of his sister Tonya. Provide your answer to two decimal places.
A rapid test for presence in the blood of antibodies to HIV, the virus that causes AIDS, gives a positive result with probability about 0.004 when a person who is free of HIV antibodies is tested. A
A rapid test for the presence in the blood of antibodies to HIV, the virus that causes AIDS, gives a positive result with probability about 0.004 when a person who is free of HIV antibodies is test
An instant lottery game offers you probability 0.01 of winning on any one play. Plays are independent of each other. If you play three times, the probability that you win on none of your plays is rega
The birth control shot is one of most effective methods of birth control available, and it works best when you get the shot regularly, every 12 weeks.
Joe reads that 1 out of 6 eggs haves salmonella bacteria. So he never employs more than five eggs in cooking. If eggs do or don't have salmonella independently of each other, the number of contamina
James reads that 1 out of 5 eggs haves salmonella bacteria. So he never uses more than 4 eggs in cooking. If eggs do or don't contain salmonella independently of each other, the probability that at
A stack of four cards contains two red cards and two black cards. I select two cards, one at a time, and do not replace the first card selected before selecting the second card. Consider the events
If the number of spots showing is 1 or 2, you win nothing. You are going to play the game twice.The probability that you win something on each of the two plays of the game is
The number of successes doesn't have binomial distribution because the throws are not independent. The number of successes doesn't have binomial distribution. The probability of success differs wildly
There are 5 multiple choice questions on an exam, each having responses a, b, c, or d. Each and every question is worth five points, and only one potion per question is correct. Suppose the student
Compute the covariance of the set of data. (Give your answer correct to two decimal places.)
A set of 20 cards includes 12 red cards and 8 black cards. The cards are shuffled thoroughly and you pick one at random, observe its color, and replace it in the set. The cards are thoroughly reshuf