15) No one could turn around a failing restaurant as expertly as Gordon, whose experience and cadre of trained professionals was available at a moment's notice should his services be needed. This ability, some might call it a gift, was developed to such a level that other restaurant consultants were unable to match his results. This ability is best described as his:

Sales at a fast-food restaurant average $6,000 per day. the restaurant decided to introduce an advertising campaign to increase daily sales. to determine the effectiveness of the advertising campaign, a sample of 49 days of sales were taken. they found that the average daily sales were $6,300 per day. from past history, the restaurant knew that its population standard deviation is about $1,000. if the level of significance is 0.01, have sales increased as a result of the advertising campaign? multiple choicea)fail to reject the null hypothesis.b)reject the null hypothesis and conclude the mean is higher than $6,000 per day.c)reject the null hypothesis and conclude the mean is lower than $6,000 per day.d)reject the null hypothesis and conclude that the mean is equal to $6,000 per day.expert answer

Anational survey asked people, "how often do you eat out for dinner, instead of at home? " the frequencies were as follows.

Exhibit 34-1 country a country b good x 90 60 30 0 good ygood x good y 0 30 60 90 30 20 10 20 40 60 refer to exhibit 34-1. considering the data, which of the following term to? a. 1 unit of y for 1 unit of x b. 1 unit of y for 0.75 units of x c. 1 unit of y for 0.25 units of x d. 1 unit of y for 1.50 units of x e. all of the above s of trade would both countries agree 8. it -