Can you help me with identifying how to solve these problems?

The following stem and leaf diagram represents the exam 1 scores in an underwater basket weaving class. 4 | 25 5 | l 6 | 558 7 | 2345 55 8 | 29 9 | 001 a) What is the class mode? 11) What is the class mean for the exam? c) What is the class range for the exam? d) Classify the following as discrete, continuous, nominal or ordinaL Time students spent taking the exam Rating (easy to difcult) students gave to the exam e) The underwater basket weaving class decides to play the Georgia Pick 3 lottery game. You pay 51 cents to select a sequence of 3 digits (0-9). such as 205 (repetition is allowed). Ifyou select the same sequence of 3 digits that are drawn, you win $356. What is the probability of winning? What is the expected value of the class winnings? 1) Two students in the class are comparing their SAT versus ACT scores. Scores on the SAT test have a mean of 1518 and a standard deviation of 325. Scores on the ACI' test have a mean of 21.1 and a standard deviation of 4.8. Use zscores to determine which is better: a score of 1840 on the SAT test or a score of 26.0 on the ACT test. a) A researcher was interested in comparing the amount of time spent watching television by women and by men. Independent simple random samples of 15 women and 5 men were selected, and each person was asked how many hours he or she had watched television during the previous week The summary statistics are as follows. 21 : 106 hrs :22 : 12.4 hrs .5 =5-1hrs n =15 The following 95% condence interval was obtained for ,ul #2, the difference between the mean amount of time spent watching television for women and the mean amount of time spent watching television for men; -530 (p1 p: