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1. Referring to Exercise 8.17 and using the fact that O has an approximate N[9, l/n/(9)], ih eahh case construct an approximate 95 percent confidence interval for 9.
2. Let (X1 , Y1 ), (X2 , Y2 ), • • • ,(Xn , Yn) be a random sample from a bivariate normal distribution with unknown means 61 and 92 and with known variances and correlation coefficient, ,a, and p, respectively. Find the maximum likelihood estimators 01 and 82 of ()1 and 92 and their approxi mate variance-covariance matrix. In this case, does the latter provide the exact variances and covariance?
Perform hypothesis testing on one variable's data (choose either the intrinsic or extrinsic Job Satisfaction)using 25 as our data set number.
run a regression analysis on the following data set with y as the response
consider the following table and use the formulas that are given for computing the correlation coefficient. give your
describe the distribution of sample means shape expected value and standard error for samples of n36 selected from a
About 40% of the general population donate time and energy to community projects. Suppose 15 people have been randomly selected from a community and each asked whether he or she donates time and energy to community projects.
iq scores in a certain population are normally distributed with a mean of 95 and a standard deviation of 13. give your
How large a sample size will need to be selected if we wish to have a 99% confidence interval with a margin for error of .25 hours?
using the wilcoxon rank sum test analyze the following data for evidence that population b is different from population
What statistic (mean, median or mode) would you use to describe each aspect of the "typical" home? For example, you might use the MEAN for price, the MEDIAN for square footage.
Explain these results to a person who has never had a course in statistics - An experiment is conducted in which 60 participants each fill out a personality test,
Find the least-squares regression line to predict chirps per second based on temperature. increase in temperature. Predict the chirps per second if it is 83.3 degrees.
The life expectancy of Timely brand watches is normally distributed with a mean of four years and a standard deviation of eight months. What is the minimum and the maximum life expectancy of the middle 95% of the watches?
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