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1. A regression analysis was carried out to determine whether wages increase for blue-collar workers depending on the extent to which ?rms that employ them engage in product exportation. The sample consisted of 585,692 German blue-collar workers. For each of these workers, the income was known as well as the percentage of the work that was related to exportation. The regression slope estimate was 0.009, and the t-statistic value was 1.51.8 Carefully interpret and explain these ?ndings.
2. An article in Financial Analysts Journal discusses results of a regression analysis of average price per share P on the independent variable X/k, where X/k is the contemporaneous earnings per share divided by ?rm-speci?c discount rate. The regression was run using a random sample of 213 ?rms listed in the ValueLine Investment Survey. The reported results are P = 16.67 + 0.68X /k (12.03) where the number in parentheses is the standard error. Is there a linear relationship between the two variables?
testing equality of two means.an independent testing agency has been contracted to determine whether there is any
Based on this reality, the one-way analysis of variance provides the most effective tool for determining if there are any statistically significant differences in the population.
Evaluate probabilities using the laws of probability, the standard normal distribution, t-distribution, or X2-distribution.
A sample of students were asked to rank their looks compared to the looks of others on a scale from 1 to 10. A 10 means they feel they are more attractive than everyone else while a 1 means they feel they are less attractive than everyone else. Th..
Find the distribution of profit for a unit price of $500. Use the Decision Table tool to find the best price between $400 and $600 in steps of $25.
What would the researchers have concluded about the study medication if they had ignored the effect of sepsis on survival in their analysis?
In order to evaluate a new release of a database management system, a database admin- istrator runs a benchmark program several times and measures the time to completion in seconds. Assuming that the distribution of times is normal with mean 95 se..
a drug manufacturer claimed that the mean potency of one of its antibiotics was 80. a random sample of 100 capsules
Classify the events as dependent or independent - find the probability that he or she owns a credit card given that the student is a freshman. Round your answer to three decimal places.
1. Data for the "plasters" experiment undertaken in week 2 (7/10/14) are available on Moodle. Eliminate one of the rows of data (i.e. one plaster type for one person) at random and specify in your response which one was removed.
Faced with rising fax costs, a firm issued a guideline those transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below.
How does the shape of the quantile plot affect your interpretation of the results?
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