Answer all.

Question 5 {1 point] Answer the question Tn.Ie or False. In most situations, the true mean and standard deviation are unknown quantities that have to be estimated. QuEstion 6 {'1 point] Answer the question Tn.Ie or False. Sample statistics are random variables, because different samples can lead to different values of the sample statistics. For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 20 students, and the distribution of total study hours per week is bell-shaped with a mean of 14 hours and a standard deviation of 2.6 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between C] hours and Cl hours on Statistics each week. b) 95% of the students spend between C] hours and |:] hours on Statistics each week. c) 99.7% of the students spend between C] hours and Cl hours on Statistics each week. Question 9 (3 points) Choose appropriate permissible statistics pertaining to Nominal, Ordinal, Interval, and Ratio variables from the following list of statistics. You must mention all the statistics relevant to each type of variables. (answer here) Mean; Median; Mode; Quartiles; Standard Deviation Remaining Time: 47 minutes, 31 seconds. . Question Completion Status: Ly Moving to the next question prevents changes to this answer. Questions at 15 Question 4 J points In a group of 150 students. 60 of them take statistics, 45 of them take physics, 25 take statistics and physics. If a randomly chosen student takes physics, then what is the probability that the student takes the statistics? O O O O