The standard error of an estimator is the standard deviation of the estimator. True False

Suppose you wish to invest money safely and are trying to decide between stock options in two companies. The average rates of return are the same for both companies but, one company has a much larger standard deviation of its rates of return.Which company should you invest in? The company with the larger standard deviation The company with the smaller standard deviation

Cameron had a score of 41 on a physics test.  Originally, the mean score was 36 and standard deviation was 2.  The professor decides to curve the test so that the new mean is 80 and the new standard deviation is 5.  What is Cameron’s new score?  Hint: See the last few Z-score lecture slides

Solve the problem. A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally distributed with a mean of 22 and a standard deviation of 5. Scores on the second test are normally distributed with a mean of 71 and a standard deviation of 10.3. Assume that the two tests use different scales to measure the same aptitude. If a student scores 29 on the first test, what would be his equivalent score on the second test? (That is, find the score that would put him in the same percentile.) 078 83 86 85