Aregression of average weekly earnings (awe, measured in dollars) on years age (measured in years) using a random sample of college-educated full- time workers aged 25-65 yields the following: awe 696.7+9.6 x age, r'-0.023, ser 624.1.
a. explain what the coefficient values 696.7 and 9.6 mean.
c. the regression r2 is 0.023. what are the units of measurement for the
d. what is the regression's predicted earnings for a 25-year-old worker?
e. will the regression give reliable predictions for a 99-year-old worker?
f. given what you know about the distribution of earnings, do you think of measurement for the ser? (dollars? years? or is ser unit-free? ) r2? (doliars? years? or is r2 unit-free? ) a 45-year-old worker? why or why not? it is plausible that the distribution of errors in the regression is nor- mal? (hint: do you think that the distribution is symmetric or skewed? what is the smallest value of earnings, and is it consistent with a normal distribution? ) g. the average age in this sample is 41.6 years. what is the average value of awe in the sample? (hint: review key concept 4.2.)

1. revising for conciseness - eliminating flabby expressions,limiting long lead-ins, and dropping unnecessary fillerstime is money in any business environment. people want information communicated quickly and clearly. to make your writing more concise and understandable, avoid flabby expressions, long lead-ins, and unnecessary fillers. your audience will appreciate your brevity.1. if your writing contains a flabby expression like in view of the fact that, replace it with the word because / although / probably .for each of the following two sentences, choose the best revision.2. i am sending you this letter to inform you that we have experienced an unexpected surprise within our expense sheet, but we are positively certain we will solve it.1) we need to inform you that we have experienced an unexpected surprise with our expense sheet, but we are midway to an end result.2) we have identified a problem with our expense sheet, but we will solve it.3) i am sending you this letter to inform you that we have a problem with our expense sheet, but we are positively certain we have a solution.3. it is the user who should contact the center.1) everyone knows that it is the user who should contact the center.2) the user should contact the center.3) if there is a problem, the user should contact the center.read the following passage, and then answer the question.[1] you scheduled seven conference calls for this morning between 10 and 11 a.m. [2] generally, the company limits the number of conference calls to three per hour. [3] i’m letting you know that in the future, we should be more careful about scheduling.4. which revision limits the long lead-in in sentence 3? 1) in the future, we should be more careful about scheduling.2) i’m letting you know so that in the future we are more careful about scheduling calls.3) so that you know in the future, we should be more careful about scheduling.