(a) the range and (b) the standard deviation of the set of data 35, 27, 34, 29, 32, 30, 30 The range isGabriel and Lucia took a road trip across the country. The room costs, in dollars, for their overnight stays are listed in the accompanying table. How many of the cost amounts are within one standard deviation of the mean? Click the icon to view the room costs in dollars. There are cost amounts within one standard deviation of the mean. ( Type a whole number. ) X Room Costs ($) 70 105 125 205 210 225 230 235 295 315 320 Print Done Clear all Check Help me solve this View an example Get more help - 55OF Clear K D 13Homework: 12.3 Homework Question 10, 12.3.39 HW Score: 59.09%, 6.5 of 11 points Part 1 of 4 Points: 0 of 1 Save Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under controlled conditions. Five of each brand failed after the number of months shown. Calculate a) both sample means and b) both sample standard deviations. Decide c) which brand battery lasts longer and d) which brand has the more consistent lifetime. Brand A: 63, 73, 66, 75, 70 Brand B: 63 65 61, 62, 63 a ) What are the sample means? XA = 0 XB = 0 4 Clear all Check answer Help me solve this View an example Get more help - 12:49 AM 4/13/2022 54 OF Partly cloudy