exam I 19. The following are the age(in years) and price (in hundreds of dollars) data for a certain type of car. Age (x) Price (y) 272 7 256 6 277 3 410 3 367 5 296 5 340 4 305 108 310 (a) Obtain the linear correlation coefficient. (b) Interpret the value of r in terms of the linear relationship between the two variables. 10Propaction confidence in+ 12 15. In a poll, 800 adults in a region were asked about their online vs. in store clothes shopping. One finding was that 32% of respondents never clothes-shop online. Find and interpret a 95% confidence interval for the proportion of all adults in the region who never clothes shop online. 8 , 9, 12 16. A population proportion is .4. The number of successes and the sample size for a simple random sample from that population are x = 7, n = 35. (a) Determine the sample proportion od'T Is at nouislagoq s to ness ofT .er out is het steerlogyd s anoling of debt- (sam sao ord sat .8 = b ban 85 = 5 (b) Perform a hypothesis test to determine if the population proportion is not .4 at a 5% significance level