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From a random sample we know that the average duration of unemployment in a low developed region A is 147 days (with standard deviation sA = 32 days and nA = 230 unemployed). Another random sample from a high developed region B reveals an average duration of unemployment of 96 days (with standard deviation sB = 43 days and nB = 180 unemployed). Is the duration of unemployment in region A significantly higher than in region B? Calculate also the p-value (p-Wert, empirisches Signifikanzniveau) of the test statistic.
Find out the test statistic P-value, and critical value, and state the final conclusion. The mean IQ score of statistic professors is less than 120. Sample data: n = 46. Suppose that = 17, and the significance level is = 0.05.
Determine the probability that a randomly selected sample of 31 patients would produce an average diameter of 6.6 mm or less for the non affected tendon?
A company supplies poultry farmers with hens, advertising that a mature B300 Layer produces eggs with a mean weight of 60.7 grams. Suppose that egg weights follow a Normal model with standard deviation 3.1 grams.
Use the Internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used and summarize your finding.
A scatter diagram that plots the values of the residuals against the values of the dependent variable
According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy and electronically file a 1040 tax form. The distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchd..
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
What quantitative method can be applied to help the Department make the decision? Outline how this method can be applied and explain how a qualitative method can also be applied to help the Department make the decision
Run an ANOVA using only groups 1 to 6 (You can hide group 7 from the analysis by data followed by select cases and then you filter out group 7 by if GROUP~= ). Also run the posthoc tests LSD and Bonferroni.
Years to Complete a Graduate Program: The average number of years a person takes to complete a graduate degree program is 3. The standard deviation is 4 months. Assume the variable is normally distributed. If an individual enrolls in the program, ..
If the voice identifications were made by random guess, find the probability that all 9 victims would select the same person?
To what probabilities do each of the following sigma levels correspond to, based on a standard normal curve: 3 sigma, 4sigma, 5 sigma, and 6 sigma? (Hint: Use the NORMSDIST function in Excel.
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