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A sample of twenty workers in a small company earned the following wages for a given week; mean weekly wage 170$; median weekly wage, 160$; modal weekly wage 140$. Given that you were placed in each of the following positions in turn, indicate which measure of average you might be inclined to report and in what sense each value can be considerd typical. (A) as vice president responsible for collective burgaining.(B) as the president the employee burgaining unit.
The expected peak expiratory flow rate in adults is 300 with a standard deviation of 50. how many subjects should be enrolled to ensure 80% power to detect a difference of 15 liters per minute with a two-sided test and significance level of 0.05?
Differentiate between descriptive statistics and inferential statistics. Provide an example for each. How does correlation analysis differ from regression analysis? What does a correlation coefficient reveal? Is correlation the same as causation?
The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 families, neither father nor son attended college; in 12 families,..
A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
What is the estimated standard error of the sample mean? Construct a 95 percent confidence interval for the population mean category fluency test score.
An election poll reported that a candidate had an approval rating of 34% with a margin of error E of 2%. Construct a confidence interval for the proportion of adults who approve of the candidate.
Enzymatic method: 13.1, 12.7, 12.6, 13.3, 13.3. GC method: 13.5, 13.3, 13.0, 12.9. Does the enzymatic method give the same value as the GC method at the 95% confidence level?
A random sample of 100 peaches is gathered and the mean diameter is calculated. What is the probability that the sample mean is greater than 3.79 inches.
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample approximately half the size.
Write out the multiple regression equation using the given data.
A company sampled 40 of the springs that it manufactures for use in small engines and discovered that 20% of the springs did not meet specifications.
Find the value of Proportion and construct a 90% confidence interval for proportion.
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