USE THE IN FORMATION BELOW TO ANSWER QU ESTIONS 31 TH RU 33 An Internet based erlearning company has begun using new online statistics content to replace a textbook. Since the main competition is hardback textbooks. before the company decides what price to charge students for the new product. it wants to know the average price of all hardback statistics textbooks currently on the market. The research department at this e-learning company took a random sample of 20 such textbooks and collected information on their prices. The data could then be used to compute a condence interval for the true mean price of hardback statistics textbooks. Assume the populaon ofthese textbook prices is normally distributed. Question 31 1 pts Choose the formula that should be used to calculate a condence interval for the true mean pr'lce of hardback statistics textbooks. 0 Can't answer this question based on the lnfonnation givun. s oat: Question 32 1 pts Fora 98% condence lnterval pick the appropriate 2 ortvalue thatwould be used. o 1.96 O 1.32 o 2.05 o 2.54 Question 33 1 pts If we have a data set where the smallest price is $75.40 and the largest price is $145.90. what is an acceptable estimate for the value of the sample standard deviaon of the prices in the sample? 0 $6.50 0 $20.25 0 $25.50 0 $11.75