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A test consists of 25 multiple-choice questions. Assume that a test taker randomly guesses a choice for each and every question, and each correct answer is worth 4 points. Clearly state what probability model(s) you use and what value each parameter is equal to.
1. If each and every question has 3 choices (one correct, two incorrect), what is the probability that the test taker will get a B or better (i.e., 80 points or higher)?
2. If 22 questions has three choices each (one correct, two incorrect) and three has true-false questions (one correct, one incorrect), what is the probability that the test taker will get a B or better?
Confidence interval for the true mean and Evaluate the 95% confidence interval for the true mean advertising expense?
Sstandart deviation of 40 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 368 seconds.
a company manufactures two products product a and product b. the wholesale price and manufacturing cost of each product
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
A game involving a pair of dice pays you 3 with probability 17/36, costs you 2 with probability 14/36, and costs you 4 with probability 5/36. What is your probability of losing money in one play of the game?
A biologist has found the average weight of 12 randomly selected mud turtles to be 8.7 lb with standard deviation 3.6 lb. find a 90% confidence interval for the population mean weight of all such turtles.
Suppose in fact that 47% of the population favors this idea. Use the normal distribution to calculate the probability that at least half of the sample are in favor.
Identify the implied population in the information here. Government agencies carefully monitor water quality and its effect on wetlands
Mmean number of outgoing calls in a random selection of calls? Also, compute the standard deviation. In a selection of 12 calls, what is the probability that less than 3 were outgoing?
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
Run a chi square goodness of fit using Type of Purchasing (PurType) as the variable with all categories equal and report the observed and expected values and the tests of statistical significance.
a hand of 13 cards is dealt at random and without replacement from an ordinary deck of 52 playing cards. find the
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