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an observational study is conducted to investigate the association between age and total serum cholesterol the
a clinical trial is being planned to investigate the effect of a new experimental drug designed to reduce total serum
an individual wanted to determine the relation that might exist between speed and miles per gallon of an automobile let
its believed that as many as 20 of adults over 50 never graduated from high school we wish to see if this percentage is
an airline company is considering a new policy of booking as many as 158 persons on an airplane that can seat only 160
a history class is comprised of 8 female and 6 male students if the instructor of the class randomly chooses 5 students
an employer interviews 9 people for 6 computer programming positions in a company and 4 of the 9 people are men if all
it is estimated 30 of all adults in united states invest in stocks and that 88 of us adults have investments in fixed
of the people who fished at clearwater park today 63 had a fishing license and 27 did not of the people who fished at
at a local college 316 of the male students are smokers and 474 are non-smokers of the female students 70 are smokers
a history class is comprised of 6 female and 7 male students if the instructor of the class randomly chooses 11
in a random sample of 10 reduced fat chocolate chip cookies the sample mean for the number of chocolate chips was 176
suppose that a certain college class contains 65 students of these 35 are seniors 33 are biology majors and 5 are
a pizza restaurant offers 11 different toppings 6 of them are vegetarian and 5 of them are non-vegetarian a customer
suppose that 3 of all adults suffer from diabetes and that 28 of all adults are obese suppose also that 2 of all adults
it is estimated that 89 of senior citizens suffer from sleep disorders and 8 suffer from anxiety moreover 5 of senior
suppose that a certain college class contains 49 students of these 24 are seniors 26 are english majors and 9 are
a random sample of the price of gasoline from 20gas stations in a region gives the statistics below complete parts a
suppose that a certain college class contains 42 students of these 23 are freshmen 28 are history majors and 8 are
a statisticsnbspinstructor at a large western university would like to examine the relationshipnbspif anynbspbetween
anbsppsychologist would like to examine the effects of a new drug on the activity level of animals three samples of
suppose a firm that produces light bulbs wants to know whether it can say that its light bulbs typically last more than
these are pretty similarthe population standard deviation of the number of people who shop online is 31 if you want to
a survey of 68 courses delivered fully online found a mean of 135 videos with a standard deviation of 281 you can