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A physics lab instructor wants to estimate the time required for physic students to complete a required experiment. From a previous study she found the population standard deviation to be 16 min. How large a sample is required to be 90% confident that the point estimate is within 5 min of the population mean time?
If the Pearson Correlation is 0.18, what do we get, what is the value called, and what does it tell us?
Is the distinction among various parts of the bell-shaped curve arbitrary or is there certain logical and rational principle involved that creates such distinctive demarcations shown in a chart like this?
at a large university it is known that 50 of the students live on campus. the director of student life is going to take
Graph the least-squares line on your scatter diagram. Be sure to use the point (x, y) as one of the points on the line.
Following are speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon; Make (a) a frequency table, (b) a histogram, and (c) a frequency polygon. Then describe the general shape of the distribution.
europeans are increasingly upset at their leaders for making deep budget cuts to many social programs that are becoming
a what percentage of speeds was above 60 milesh or below 20 milesh?b describe in detail the shape center find the
according to an airline a particular flight is on time 85 of the time. suppose 13 flights are randomly selected and the
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
in a survey 427 different women are randomly selected without replacement and each woman is asked what she purchased
Machine which fills quart milk cartons is set up to average 32.2 oz per carton, with standard deviation of 1.2 oz. Determine probability that filled carton will contain less than 32 oz of milk?
the sample mean x bar is the maximum likelihood estimator of sigma if the underlying p.d.f is fxsigma 1sigmae-xsigma
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