Scientists have developed a new forensic method for estimating the age of an unidentified crime victim using DNA information in the victim’s blood. To confirm the accuracy of the method, Dutch researchers measured this variable along with the age of 195 volunteers ranging in age from a few weeks to 80 years. The resulting scatterplot (from their paper in Current Biology) is shown below.         The researchers put the blood test measure on the horizontal axis because they intend to use it as the explanatory variable to determine age (response variable). NOTE: this measure takes negative values. The least squares regression line is AGE = -33.65 – 6.74 x BLOOD TEST MEASURE with r-squared = 83.5%.  The researchers propose using the equation of the line to determine the age of crime victims from the blood test measure. Which of the following is the correct interpretation of the slope of the regression equation?

The following chart shows the percentages of injuries to females that received emergency room care, according to the place where the injury occurred, comparing 2005-2008 and 2011-2014. The percentages don’t add up to 100%, which means that not all locations fit one of these categories.                                    A large percentage of injuries occur at the home (inside or outside).   In 2011-2014, what percentage of injuries occurred at the home (inside or outside)? (Enter a numeric value only.  Do not include the percent notation (%).)  

A statistics instructor creates a student survey to get to know her students.  She created the survey from questions students provided.  Select ALL graphs that could be used to summarize the following survey question:  Would you eat pineapple on pizza?

The New England Journal of Medicine reported that people who suffer a cardiac arrest in public places like casinos have a higher survival rate than those who have a heart attack in a hospital.  Which one of the following is a valid interpretation of this finding?

Which of the following are gauche conformers?

Which of the following statements about constitutional isomers is not true?

Which of the following compounds is both a Brønsted-Lowry acid and base?

Which of the following resonance structures is the least important contributor to the resonance hybrid of the formate anion, HCOO–? 

Which of the following statements about constitutional isomers is not true?

Which of the following compounds is both a Brønsted-Lowry acid and base?