11.2 Find the t critical values for mean testing associated with the shaded area of each curve. 0-.05 n=40 C. 0 t b. 0 t a-.005 n=25 -t 0 d. -t a-25 n=11 a-.01 -16 11.3 Using the correct format, state both the null and alternative hypotheses. a. The mean cost of a hotel room per night is at least $200. b. The mean number of calculations for the world's fastest computer is more than 280 trillion per second. c The mean price of a new smart phone is more than $199. d. The mean cost of a Rolls Royce Phantom Coupe is $440,000. e. The mean cost of dinner at a world class restaurant is at least $125. 11.4 Find the t critical values suggested by the given data. a. Hou=12; H: 12; n = 27, = .05 b. Hou 500; H: > 500; n = 17, = .10 c. Hou 10.75; H: < 10.75; n = 29, = .01 d. Ho= 75 H: 75; n = 24, = .05 e. Hou 98.4; H: < 98.4; n = 12, a = .05 11.5 Using the appropriate format, state both the null and alternative hypotheses. a. Hershey sells an average of 395 million chocolate bars a year. b. Americans spend at least $123 per person per year on toys. c. The mean cost of a textbook is greater than $135.00. d. An average of 180 million boxes of Cheerios is sold every year. e. The mean IQ of students is greater than 110. 1.6 This season's average for professional golfers in the PGA is 71.355. Test if the average is correct using a sample of the top 5 players averaging 69.196 with a standard deviation of .383. Use a = .10.