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Suppose Babsie generated the following probability distribution: p(x) 5 .25 7 .30 10 .25 12 .05 15.Is this probability distribution discrete or continuous? Explain your reasoning. Calculate the expected value of X. Calculate the variance of X. Calculate the standard deviation.
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
Standard deviation of the ages is 6 years. How large a sample should be taken so that the estimate is within 2 years of the population mean?
the correlation between the number of police on the street and the number of crimes committed for a sample of 15
Conduct a test for checking that the proportions of women and men that liked commercial A are the same versus the two-sided alternative at the 5% level.
the following data lists the avarage monthly snowfall for january in 15 cities around the us13 31 15 3 26 47 24 21 44
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
What is the expected number of Republicans who will win office in the coming election?
let y be b192p. we rehect h0p0.75 and accept h1 pgt0.75 if and only if ygt152. use the normal approx to determine.a
Make a scatter diagram of the scores; (b) describe in words the general pattern of correlation, if any (c) figure the correlation coefficient; (d) figure whether the correlation is statistically significant.
Determine the p-value for this test. Is there sufficient evidence to justify the rejection of H0 at the "alpha" level of 0.01? Please explain your answer.
the management of a shop has gathered data on customer purchasing habits and knows that 20 its customers typically make
if a data set has an even number of observations the mediana. is the average value of the two middle itemsb. is the
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