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Using the following estimated regression results log?(consumption)=2.10+0.06age interpret how being one year older (age) is expected to affect weekly consumption expenditure (consumption):
A. an additional year of age will increase weekly consumption expenditure by 1.6 per cent.
B. an additional year of age will increase weekly consumption expenditure by 2.16 per cent.
C. an additional year of age will increase weekly consumption expenditure by 0.06 per cent.
D. an additional year of age will increase weekly consumption expenditure by 6 per cent.
A university employment office wants to compare the time taken by graduates with three different majors to find their first full-time job after graduation.
The probability that more than 6 planes arrive in the next minute is _____.
Suppose we roll one fair six-sided die, and flip six coins. What is the probability that the number of heads is equal to the number showing on the die?
A survey of 5,250 business travelers worldwide conducted by OAG Business Travel Lifestyle indicated that 91% of business travelers consider legroom.
Show that Q3 is an unbiased estimator for q and if Q1 and Q2 are independent, how should the constant a be chosen in order to minimize the variance of Q3?
Assuming that the data may be looked upon as a random sample from a normal population, construct a 99% con?dence interval for the actual average number of errors per page in this book and interpret. In this problem, is the normal model appropriate..
If 9 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 47.6 tons. Assume that the variable is normally distributed.
Equal opportunity? A company is sued for job discrimination because only 19% of the newly hired candidates were minorities when 27% of all applicants.
Compute correlation loading coefficients using (a) the correlation matrix, and (b) the covariance matrix. How do the two sets of coefficients compare to each other? Are both sets equally informative? Explain (see also Exercise 3.23).
Using a chi-square goodness-of-fit test, decide to retain or reject the null hypothesis that production of the premium lagers matches these consumer.
Convert each of the following z intervals to x intervals.
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 19. If 570 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects?
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