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Show that Pearson's Chi-square statistic for testing Ho : 1 = 2 when there are k-categories reduces to Z^2 when k = 2, where Z = 2 sqrt(n)(p1-1/2) is the standard Z-test for testing Ho : 1 = 1=2
It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's Law, shown below.
Three different methods for assembling a product were proposed by an industrial engineer. To investigate the number of units assembled correctly with each method
Write the null and alternative hypotheses for testing if participants and non-participants differ in level of problem behavior (Y).
Exam is given to 20 randomly chosen students and their average length of t time needed to finish exam was 54 minutes with standard deviation of 5.99 minutes. Test instructor's claim at the 0.05 level of significance.
Compute the mode, median and mean for the college students and compute the mode, median and mean for the parents' data
Calculate the value of chi-square. What is your decision regarding H 0 ?
Determine SSE, SS (Total) and the explained sum of squared variation SSR and find the estimated y intercept slope and write the regression equation.
Stanford Binet IQ scores have a mean of 100 and a standard deviation of 15. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score.
Determine odds student gets more than 14 questions correct? Determine the odds student gets exactly 12 questions correct?
Passengers using New York's MetroCard system must swipe the card at a rate between 10 and 40 inches per second, or else the card must be re-swiped through the card reader. Research shows that actual swipe rates by subway riders are uniformly distr..
Explain the independent variable, covariate, and levels (groups) of eah. Also, explain the dependent variable and its associated measurement scale and expected outcome.
According to Chebyshev's theorem, proportion of values from data set that is further than 2 standard deviations from the mean is at most?
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