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There are a lot of symbols so I am sorry if this is hard to read.
Q=theta hat, q=theta
Suppose E(Q1)=E(Q2)=q. V(Q1)=(sigma1)^2, V(Q2)=(sigma2)^2. Consider the estimator Q3=aQ1+(1-a)Q2.
a)Show that Q3 is an unbiased estimator for q.
b) If Q1 and Q2 are independent, how should the constant a be chosen in order to minimize the variance of Q3?
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
Compare the effectiveness of three methods of teaching (IV). You plan to administer a standardized test (DV measured on an interval scale measuring knowledge acquisition) to the students in three classes with each class using a different teaching ..
A sample of 100 orders revealed that 82 were delivered within the promised time. At the .10 significance level, can we conclude that less than 90 percent of the orders are delivered in less than 10 minutes?
Simulate this problem using the Monte Carlo process. Show the demand during lead time (DDLT) for 30 reorders and determine the expected demand during lead time.
It is estimated that the competitor will submit a bid for the contract with probability 0.40. What is the probability of getting the deal?
Also how inventory can act as a buffer in the production process. Discuss why it is sometimes prudent not to order the minimum level required to obtain a quantity discount.
Develop a linear regression equation for these data and forecast how much money Robert will win if he spends $30.
The process of using sample statistics to draw conclusion about the true population parameters is called:
Explanation on what is the logic behind using the sum of the products of deviation scores as the numerator of the formula for the correlation coefficient?
A better case can be made that observation 13 (Los Arboles) is an outlier. Describe what this means in plain terms.
If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
A statistically significant result occurs when the value of the test statistic falls in the rejection region. A result has practical significance when it is statistically significant
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