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1. A regression was carried out aimed at assessing the effect of the offer price of an initial public offering (IPO) on the chances of failure of the ?rm issuing the IPO over various time periods from the time of the offering (the maximum length of time being 5 years). The sample was of 2,058 ?rms, and the regression slope estimate was -0.051. The reported p-value was 0.034.13 What was the standard error of the slope estimate? Interpret the ?ndings.
2. A study was undertaken to ?nd out whether neuroticism affected job per- formance. The slope estimate of the regression line was 0.16 and the r 2 was 0.19. The sample size was 151. The reported value of the statistical signi?cance of the slope esti- mate was p 0.001, two-tailed.14 Interpret and discuss these ?ndings. Does the degree of "neurosis" affect a worker's performance for the particular jobs studied in this research?
What is the population? What values does the population distribution describe? What is this distribution? What values does the sampling distribution of x describe? What is the sampling distribution?
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
Suppose that monthly rental rates for unfurnished one-bedroom apartment in Ann Arbor, Michigan, are approximately normal in distribution, with a mean of $750 and a standard deviation of $150.
question assume that charlotte has two stocks disney d and amazon a. for each of these stocks the possible percent
a popular doughnut shop makes 5000 doughnuts per day of which 30 1500 doughnuts have chocolate icing. andy likes
Compute a 95% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24 and 59. Change the number from 59 to 24 and recalculate the confidence interval.
A shop manual gives 6.5 hours as the average time required to perform a 30,000 mile major maintenance service on a Porsche 911. Last month a mechanic performed 11 such services, and his required times were as follows.
Consider the data for a three-group MANOVA with two dependent variables. Run the MANOVA on SPSS. Is it significant at the .05 level? Examine the univariate F's at the .05 level. Are any of them significant? Explain this situation.
explain what problems arise in trying to make conclusions based on a survey mailed to the subscribers of a specialty
Select a well-designed sample of at least 30 units. (Describe the population to be studied and the sampling frame). Two variables should be measured with a potential for correlation; if you measure more than two variables, you must correlate two at a..
Find a dataset: approximately 30-100 scores or observations. Write a null and alternative hypothesis, conduct a statistical significance test (in SPSS or Excel), and tell what decision you'd make about the null hypothesis, and why.
What is the standard deviation of the number of service calls and compute the coefficient of variation of the number of service calls.
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