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Problem: Let (X, Y) be jointly distributed inside the ellipse given by {(x, y) : ax2 + by2 = 1}. Find the marginal densities of X and Y and the conditional densities of Y given X and X given Y. Are X and Y correlated? Are they independent?
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
another summary measure is the age-adjusted mean which is an estimate of the mean fvc value in a reference population
assume that x is a binomial random variable with n 30 and p 0.72. calculate the following probabilities. round your
let x1...x25 be a random sample from a normal distribution with mean mu and variance 100. the null hypothesis h0 mu50
What is the probability of randomly selecting a male from this group?
The average stock price for companies making up the S&P 500 is $30, and the standard deviation is $8.20. Assume the stock prices are normally distributed.
Forty percent of the sample wanted more local news. What is the 99% confidence interval for the proportion of readers who would like more coverage of local news?
Calculate the mean of the 20 samples and draw a histogram showing the 20 sample means and describe the distribution of the x-bars that you see in part b (shape of distribution, center, and the amount of dispersion).
a clinical trial tests a method designed to increase the probability of conceiving a girl. in the study 562 babies were
a doctor studies pain levels in 88 patients to see if their chronic arthritis pain has been changed by a holistic
What four steps should be used in evaluating expressions? Could these steps be skipped or rearranged? Explain your answersr.
the us department of education reports that 46 of full-time college students are employed while attending college. a
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