Work out please

Question 2 Which term refers to statistics that are used to test a hypothesis within a small group (sample) to make Not yet answered conclusions about a larger group (population)? Points out of 1.00 F Flag question Select one: a. Inferential Statistics . b. Descriptive Statistics O c. Measurement Statistics O d. Confidence StatisticsQuestion 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. Question 3 Given the following statistics, calculate the lower Not yet bound for the 90% Confidence Interval for true answered average sleep (S): (3 significant digits in final Marked out of answer, use statistics table provided in eclass) 0.50 Sbar = 6.5 Flag sd(S)=1.2 question N=900 Answer:For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class, A survey was done on 26 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week b) 95% of the students spend between hours and hours on Statistics each week. c) 99.7% of the students spend between hours and hours on Statistics each week