12. The figure at right is a calibration curve. If the absorbance for an unknown
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12. The figure at right is a calibration curve. If the absorbance for an unknown sample is 1.5, what is the approximate concentration of the unknown sample? 2.5 2.0 1.5 (arb. units) 1.0 Absorbance o B. 10 C. 15 D.20 E. 25 13. What kind of prediction technique was used to answer Question 12? A. extraploation 0.5 0 10 20 30 B, guessing Concentration (uM) C, indication D. Interpolation E. prophecy 14. A study of 60 year old women with Type Il diabetes was conducted to see if after 13 weeks of training (walking one hour at a pace 60% or better aerobic capacity three times per week) reduced blood glucose levels. Twenty two women participated and were randomly assigned to the control group (education only) or the treatment group (Walking). Body Mass Index (BMI) was calculated from the women's height and weight and grouped by CDC BMI categories (underweight, normal, etc.). How many factors are there for this ANOVA design? A. One factor B. Two factors C. Three factors D. Can't tell, not enough information given.Explanation / Answer
13)Interpolation, you have the two data points, with a concentration level lower than 1 .5 , and one with concentration level greater than 1.5 .these will be 3rd and 4th points from the left. You will interpolate the data point( 1.5) in between these two, to get the answer.
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