A. the 1987-2010 okun’s law trendline says that the unemployment rate should have decreased in each year from 2011 to 2019, but in fact unemployment increased in each of those years. b. the 1987-2010 okun’s law trendline says that the unemployment rate should have increased in each year from 2011 to 2019, and in fact unemployment did increase in each of those years. c. the 1987-2010 okun’s law trendline says that the unemployment rate should have decreased in each year from 2011 to 2019, and in fact unemployment did decrease in each of those years. d. the 1987-2010 okun’s law trendline says that the unemployment rate should have increased in each year from 2011 to 2019, but in fact unemployment decreased in each of those years.

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