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The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 47 and a standard deviation of 9. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 20 and 47?
an instant lottery scratch off game offers a 0.04 probability of winning on any one play. plays are independent of
the data show systolic and diastolic blood pressure of certain people. find the regression equation letting the
a water treatment plant needs to maintain the ph of the water in the reservoir at a certain level. to monitor this they
a candy maker produces mints that have label weight of 20 grams on each box. assume that the weight of a box of mints
Test the hypothesis that the average hourly wage for City A is more than $0.50 per hour above the average hourly wage in City B using the following sample data:
Based on its position in the periodic table of the elements, which pure element would also react violently with oxygen and water?
a variety of studies suggest that 10 of all people are left-handed. does the student survey data support this
find the critical value taalpha2 that corresponds to a confidence level of 95 and a sample size of
Customers arrive at a two-server system according to a Poisson process having rate λ = 5. An arrival ?nding server 1 free will begin service with that server.
When the null hypothesis is rejected in the goodness-of-fit test, it means there is close agreement between the observed and expected frequencies.
you calcuate the chi-square test statistic in a test of independence and determined that xsup2 -4.23 with 10 degrees
the applet below simulates sampling from an urn containing n balls. the total number of balls in the urn the number of
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