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8 in comparing the two variances below what is the test value and what are the degrees of freedom that should be used
6 a researcher conducted a study of the access speed of 45 hard drives and concluded that his maximum error of estimate
1 the average gas mileage of a certain model car is 26 miles per gallon nbspif the gas mileages are normally
1 mrs smiths reading class can read a mean of 175 words per minute with a standard deviation of 20 words per minute
1 the mean weight of loads of rock is 460 tons with a standard deviation of 80 tons nbspif 25 loads are chosen at
15 a multiple choice quiz consists of 7 questions each with 3 possible answers if a student guesses at the answer to
9 a pet supplier has a stock of parakeets of which 30 are blue parakeets nbspa pet store orders 3 parakeets from this
1 in a survey 85 of the voters support a particular referendum nbspif 40 voters are chosen at random and x is the
1 find the mean of the distribution shownx 0 3 5px 036 040 024a nbsp188 nbsp nbspb nbsp276 nbsp nbspc nbsp120 nbsp
1 an apartment building has the following apartments 1 bedroom 2 bedroom 3 bedroom1st floor 3 1 12nd floor 1 3 23rd
1 on an eight question true-false quiz a student guesses each answer what is the probability that heshe gets at least
1 a student and a professor each choose a number between 1 and 7 1 and 7 are both possible choices what is the
1 if the mean of a set of data is 2300 and 1260 has a z-score of ndash130 then the standard deviation must bea nbsp400
the height of a mountain peak is h metres above sea-level a helicopter descends from the mountain peak such that its
foreign exchange traders often buy foreign currency in hope of making money when the currencys value changes for
an insurance companys researcher is interested in determining whether the costs of treating patients with back pain is
a plain hamburger requires one ground beef patty and a bun a cheeseburger requires one ground beef patty one slice of
1 a single card is drawn from a standard deck of cards find the probability if the given information is known about
1 how many ways are there to choose 12 sushi plates if there are 5 varieties of sushi plates including conger eel and
question an isosceles trapezoid has an area of 40meter sq and an altitude of 2m its 2 bases have ratio of 23 what are
1 a birdhouse sits on top of a pole a wire attached 3 ft below the top of the pole is attached to an anchor which is 12
1 decide whether the inverse function of g ndash4 ndash1 ndash2 0 1 ndash1 2 ndash2 is a function19 perform the
4 solve by completing the square nbsp x2 2x ndash 8 0 a nbspndash4 ndash2 nbsp nbspb nbspndash4 2 nbsp nbspc nbsp4
1 the length of a rectangle is 1 in more than twice its width nbspif the perimeter of the rectangle is 26 in find the
7 carol sells two types of pc monitors nbspshe sold a total of 14 monitors last month nbspone model sells for 280 and