math215- Final Exam Guide - Comprehensive Notes for the exam ( 80 pages long!)
Document Summary
Solutions to unit 1 self test: a. Percentage frequency polygon for the sales transactions: the sales transactions are skewed leftward, meaning that most of the sales transactions are larger dollar amounts. This pattern implies that consumers do not view the store as a convenience food store. Page 2 of 5 percentage cumulative frequency is 5%. Therefore 5% of the sales transactions are below. : based on the last column in the table you constructed in part (a), above, you can see that the percentage cumulative frequency is 20%. Therefore, 20% of the sales transactions are less than , and so 80% ( (6 40) 100 15. Mean, variance and standard deviation for grouped data: Mf 2820 m2f 205810. As you can see, most of the marks are on the lower end, with just a few marks at the higher end. If the distribution is skewed rightward, the median mark is less than the mean mark: a.
