1. The following are the test results for a grade 12 math class of 20 students:

82,85,94,96,72,79,81,97,65,91,68,86,83,72,92,72,84,97,81,75

1. Calculate the mean, median, and mode from the class's test results. Round answers to one decimal place where applicable.
2. Calculate the range of the test scores.
3. Determine the first, second, and third quartiles.
4. Calculate the percentile rank of a person who got a score of 72%.
5. What is the test score of a person who is in the 80th percentile of the data?
6. According to a weight-loss advertisement on the radio, two out of every three people who enroll in their weight-loss program reach their ideal weight in 2 weeks.
7. Identify what piece(s) of information is (are) missing.
8. Assume the cited statistic is valid. Applying this statistic to a group of 120 people who enrolled in the weight-loss program, calculate the number of people who will reach their ideal weight in 2 weeks.