Exercise 4.7.12. [S] [C][Section 4.2][Goal 4.2][(Goal 4.4] Firefighters' pay. On June 10, 2010 The Boston Globe reported that in the five years between 2006 and 2011 Boston firefighters received raises of 2%, 2.5%, 3%, 3.5%, 2.5% and 1.5%. (a) Explain why the overall raise for this five year period is not just the sum of the six percentage increases. What was the firefighters' overall raise for the five year period? (c) Wh at was the firefighters' overall raise when you take inflation into account? [See the back of the book for a hint.] Coal 4 21Goal 4.4] A raise tied to the inflation rate. 1 tn "10% over the rate of inflation":

Year Quarter Revenue 2005 Qtr1 5,206   Qtr2 6,310   Qtr3 6,037   Qtr4 5,551 2006 Qtr1 5,226   Qtr2 6,476   Qtr3 6,454   Qtr4 5,932 2007 Qtr1 6,103   Qtr2 7,733   Qtr3 7,690   Qtr4 7,331 2008 Qtr1 7,379   Qtr2 9,046   Qtr3 8,393   Qtr4 7,126 2009 Qtr1 7,169   Qtr2 8,267   Qtr3 8,044   Qtr4 7,510 2010 Qtr1 7,525   Qtr2 8,674   Qtr3 8,426   Qtr4 10,494 State the model found when performing a regression using seasonal binaries. (A negative value should be indicated by a minus sign. Round your answers to 4 decimal places.) yt =  +  t +  Q1 +  Q2 +  Q3 Use the regression equation to make a prediction for each quarter in 2011. (Enter your answers in millions rounded to 3 decimal places.)  Quarter Predicted Q1   Q2   Q3   Q4

Simple PV Interest Days Method FV $14,560.00 4.50% 90 Ordinary O a. $161.56 O b. $14,723.80 O c. $14,721.56 O d. $163.80 Type here to search 24

A paper included analysis of data from a national sample of 1,000 Americans. One question on the survey is given below. "You owe $3,000 on your credit card. You pay a minimum payment of $30 each month. At an Annual Percentage Rate of 12% (or 1% per month), how many years would it take to eliminate your credit card debt if you made no additional charges?" Answer options for this question were: (a) less than 5 years; (b) between 5 and 10 years; (c) between 10 and 15 years; (d) never—you will continue to be in debt; (e) don't know; and (f) prefer not to answer.   The paper also reported that 37.1% of those in the sample chose one of the wrong answers (a, b, or c) as their response to this question. Is it reasonable to conclude that more than one-third of adult Americans would select a wrong answer to this question? Use  ? = 0.05.  (Round your test statistic to two decimal places and your P-value to four decimal places.) State the appropriate null and alternative hypotheses. H0: p =…

1.  COVID-19 cases rose in your county from 23 to 47.  What is the percentage of increase? 2. Find the simple interest earned on 10,000 invested for 2 years at 7.25%