(08.05 LC) In a study of 250 adults, the average heart rate was 70 beats per minute. Assume the population of heart rates is known to be approximately normal, with a standard deviation of 12 beats per minute. What does a margin of error of 2 for the 98% confidence interval of the average beats per minute mean?

(08.02 MC) Arthur is testing the effectiveness of a new acne medication. There are 100 people with acne in the study. Forty patients received the acne medication, and 60 other patients did not receive treatment. Fifteen of the patients who received the medication reported clearer skin at the end of the study. Twenty of the patients who did not receive medication reported clearer skin at the end of the study. What is the probability that a patient chosen at random from this study took the medication, given that they reported clearer skin?

(08.04 MC) The grades on the last art exam had a mean of 75%. Assume the population of grades on art exams is known to be distributed normally, with a standard deviation of 7%. Using the empirical rule, approximately what percent of students earn a score between 75% and 82%?

(07.03 LC) What are the explicit equation and domain for a geometric sequence with a first term of 4 and a second term of −12?

(08.04 MC) Baking times at the cookie baking competition are normally distributed, with a mean time of 11 minutes and a standard deviation of 2 minutes. Using the empirical rule, approximately what percent of cookies are finished baking between 7 and 15 minutes?

(05.01) If $125 is invested at an interest rate of 18% per year and is compounded continuously, how much will the investment be worth in 2 years? Use the continuous compound interest formula A = Pert.

(Graphing Linear Equations MC)A restaurant at the food court in a mall is offering a lunch special. The table shows the relationship between the number of side dishes and the total cost of the special. Restaurant Number of Side Dishes Total Cost 2 $8.25 4 $11.25 5 $12.75 8 $17.25 Which of the following graphs shows the relationship given in the table?

(08.04 MC) The grades on the last history exam had a mean of 80%. Assume the population of grades on history exams is known to be distributed normally, with a standard deviation of 5%. Using the empirical rule, approximately what percent of students earned a score between 70% and 80%?

(05.05 LC) Which of the following represents the graph of f(x) = 4x − 2?

(08.05 MC) A hospital gives a survey to all surgical patients asking them to rate the quality of their hospital experience. One month after surgery, the hospital contacts the patients again to ask if there were any complications from the surgery. Last year, the results of the surveys showed that of the patients who had a poor hospital experience, 40% had post-surgical complications. What conclusion can be drawn from this study?