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A student randomly guesses at 20 multiple choice questions. Each question has four possible answers with only one being correct, and each is independent of every other question.
(a) Find the probability that the student guesses EXACTLY 4 correct.
(b) Find the probability of guessing less than 3 correctly.
(c) Find the probability of guessing more than 8 correctly.
(d) Find the probability of guessing between 4 and 6 inclusively.
(e) Would any of these be likely to occur?
a cola-dispensing machine is set to dispense a mean of 2.020 liters into a container labeled 2 liters. actual
its believed that that the mean number of dogs owned by dog-owning households is 2.1 dogs. an srs of 35 dog owners has
Take a deck of cards. A deeck has 52 cards with two major colors(Red and Black), with 26 cards each. Red colors comes in two shapes(heart and diamond)
Examine the two standard deviations. What do these indicate about the range of benefits enjoyed by the two groups?
Probability of selecting a household with no children that is equal to the value obtained by the census. Give the z statistic (rounded to two decimal places) and the P-value. What do you conclude?
Draw a fault tree for the system in which each event occurs only once and what is the next most likely component to inspect given the system fault tree.
A six-sided die is rolled 30 times and the numbers 1 through 6 appear as shown in the following frequency distribution. At the .10 significance level, can we conclude that the die is fair?
examine the stem and leaf plot below. find the original data from the stem and leaf
the calculated value of the test statistic will be? the p-value for this two-tail test will be?1 when the necessary
Either about $800,000 or about $2.2 million depending on which "average" it used. Which type of "average" does the $800,000 represents?
in october 2000 the u.s. department of commerce reported the results of a large scale survey on high school
A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control engineer has been checking the output by almost continuous sampling since the abnormal condition began. What is the probability that in..
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