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assume the random variable x is normally distributed with a mean u80 and a standard deviation o4 find the indicated
a manufacture claims that the life span of its tires is 52000 miles you work for a consumer protection agency and you
in a study of helicopter usage and patient survival among the 55 comma 55032 patients transported by helicopter 227 of
a travel analyst claims that the mean room rates at a three-star hotel in chicago is greater than 152 in a random
a light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 720 hours a random
during a certain week the mean price of gasoline was 2719 a gallon a ronadom sample of 32 stations is drwn what is
in a survey of 400 adults that say traffic is a problem east reported 36 is a problem south 33 problem midwest 26
the time spent in days waiting for a heart transplant can be approximated by a normal distributionnbsp day range of
in a survey ofnbsp3153nbspadultsnbsp1407nbspsay they have started paying bills online in the last year construct a 99
in a pre-election poll a candidate for district attorney receives 379 of 750 votes assuming that the people polled
a population has a mean mu90 and a standard deviation sigma20 find the mean and standard deviation of a sampling
in a survey of women in a certain country ages 20-29 the mean height wasnbsp653nbspinches with a standard deviation
one study based on responses from 1 013 randomly selected teenagers concluded that 43 of teenagers cite grades that
the mean height of women in a country ages 20-29 isnbsp635nbspinches a random sample ofnbsp65nbspwomen in this age
question 1find the area between -88 standard deviations below the mean and 235 standard deviations above the mean
a manufacturer of cereal has a machine that when working properly puts 20 ounces of cereal on average into a box with a
if the coefficient of determination is 0738 what percentage of the data about the regression line is
in a random sample ofnbsp50nbsprefrigerators the mean repair cost was 14600 and the population standard deviation is
a random sample of 19 college mens basketball games during the last season had an average attendance of 5046 with a
suppose a retailer claims that the average wait time for a customer on its support line isnbsp179nbspseconds a random
during the winter of 2008-2009 the average utility bill for residents of a certain state was 173 per month a random
question the following is an excerpt from a conversation between two sales clerks jean moen and sara cheney jean and
determine the sample size n needed to construct a 99 confidence interval to estimate the population mean when sigma24
question principles of macroeconomicsworksheet on keynesian demand managementthe economy of trickstoland is currently
determine the sample size needed to construct a 90 confidence interval to estimate the average gpa for the student