Archaeologists can determine the diets of ancient civilizations by measuring the ratio of carbon-13 to carbon-12 in bones found at burial sites. Large amounts of carbon-13 suggest a diet rich in grasses such as maize, while small amounts suggest a diet based on herbaceous plants. The article Climate and Diet in Fremont Prehistory: Economic Variability and Abandonment of Maize Agriculture in the Great Salt Lake Basin (J. Coltrain and S. Leavitt, American Antiquity, 2002:453485) reports ratios, as a difference from a standard in units of parts per thousand, for bones from individuals in several age groups. The data are presented in the following table. Age Group (years) Ratio 011 17.2 18.4 17.9 16.6 19.0 18.3 13.6 13.5 18.5 19.1 19.1 13.4 1224 14.8 17.6 18.3 17.2 10.0 11.3 10.2 17.0 18.9 19.2 2545 18.4 13.0 14.8 18.4 12.8 17.6 18.8 17.9 18.5 17.5 18.3 15.2 10.8 19.8 17.3 19.2 15.4 13.2 46+ 15.5 18.2 12.7 15.1 18.2 18.0 14.4 10.2 16.7 a. Construct an ANOVA table. You may give a range for the P-value. b. Can you conclude that the concentration ratios differ among the age groups?

1.1 Interval Notation 1.5 Problem Solving and using Formula Mystery Number 1) A T.V is on sale for 80% of the original price. It cost's $400 on sale. What is the original price 2) A coat is on sale for 20% oﬀ the original price. The selling price is $80. What is the original price 3) 10% of a number is added to itself, resulting in 22. What is the number 4) One number exceeds another number by 4. The sum of the two number is 20. What are the two numbers 5) One texting plan has a monthly fee of $20 with an additional fee of $0.25 per text. Another texti