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Wall Street securities firms paid out record year-end bonuses of $145,500 per employee for 2005 (Fortune, February 6, 2006). Suppose we would like to take a sample of employees at the Jones & Ryan securities firm to see whether the mean year-end bonus is different from the reported mean of $145,500 for the population. Suppose a sample of 30 Jones & Ryan employees showed a sample mean year-end bonus of $139,400. Assume a population standard deviation of $29,000.
a) In proper notation, state the hypotheses of this test.
b) Show your calculation of the test statistic. ______ = ______________
c) Give the p-value of the test to 4 decimals. p = ________________________
d) What is the conclusion about the issue in question
Write the null and alternative hypotheses you would use to test the following situation.
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
As reported by Runner's World magazine, the times of the finishers in the New York City 10-km run are normally distributed with a mean of 61 minutes and a standard deviation of 9 minutes. Let x be the finishing time for a finisher in the New York ..
Assume that the population means are to be estimated from the sample described below. Use the sample results to approximate the margin of error and 95% confidence interval
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
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The standard deviation in cash bonuses is $15,618 and the standard deviation in annual pay is $28,077. The estimated slope of best fitting line relating x and y is?
Provide a plausible research question in the field of education that implies a bivariate correlation or regression. Identify your research question, your research (alternative) hypothesis, and your null hypothesis.
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet.
Find the probability of an untrained dog performing as well as Maggie. Is it unusual for an untrained dog to do as well as Maggie?
Provide at least 1 example of how a real company has used each of the following multivariate techniques: factor analysis, multi-dimensional scaling, and cluster analysis.
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time.
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