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Find the mean, autocorrelation function and variance of the MA(2) process, assuming that n>2 for the output process Y[n].
If the survey consisted of a random sample of 40 executives, give a 95% confidence interval for the proportion of executives less willing to sacrifice.
the mean annual salary for chauffeurs is 21000. a random sample of size 45 is drawn from this population. assume that
The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.
Suppose that four tickets will be given prizes in a lottery having 30,000 tickets. What is the probability of winning at least one prize if you buy 1,000 tickets?
(b) Show that there is a value of p for which the covariance in (a) is zero. For this value, are the two random variables in (a) independent?
An experiment consists of randomly choosing 4 radios. (The order is not important.) Find the probability that all 4 of the chosen radios are defective.
Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 80 and a standard deviation of 5. Use the 68-95-99.7 rule to find the following quantities.
Assume there're three states of the economy: boom, moderate growth, and recession. The annual return on company A stock and company B stock in each state of the economy is given below
question from new york state department of motor vehicles dmv records it is known that 85 of all vehicle registered
Compute a chi-square test for goodness of fit for each of the following, using the .05 level for each. In each problem, the expected distribution is equal frequencies in each category.
Find the sample mean for each group. Find the sample standard deviation for each group. Make a dot plot of the data sets A and B on the same line.
Generate a 95% confidence interval for the difference in mean numbers of cups of coffee consumed between men and women.
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