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Let X be N(O, 1/0). Assume that the unknown O is a value of a random variable 0 which has a gamma distribution with parameters IX = r/2 and fJ = 2/r, where r is a positive integer. Show that X has a marginal I-distribution with r degrees of freedom. This procedure is called compounding, and it may be used by a Bayesian statistician as a way of first presenting the I-distribution, as well as other distributions.
The sample mean life is 805 hours with 64 hours of the sample standard deviation. Is there enough evidence to conclude that the manufacturer's claim is true at the 5% significance level?
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in context of real life situation.
you want to compare response rates percents of two regimens. a power of 90 and a two-sided test of size 0.05 are
1.i plan an experiment to test the latest conflicting diet programs. the factor for diet will involve three different
the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?
in a recent survey 72 of the community favored building a health center in their neighborhood. if 14 citizens are
find the region variable in the sampledataset. using sampledataset create a frequency distribution or a histogram.
Research results suggest that IQ scores for boys are more variable than IQ scores for girls (Arden & Plomin, 2006). A typical study looking at 10-year-old children classifies participants by gender and by low, average, or high IQ.
an urn contains 4 red and 6 blue balls. suppose that 8 balls are selected at random and with replacement. what is the
which of the following nonparametric tests reaches a conclusion equivalent to the mann-whitney u test?a. wilcoxon
question 1 a high school counselor wants to examine whether the teenage pregnancy rate at her school is different from
can the value of the mean median or mode of a set of scores ever be negative?
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