Mileage tests were conducted on a randomly selected sample of 100 newly developed 5) automobile tires. the sample mean tread wear was 50,000 miles, with a population standard deviation of 3,500 miles. what is the best estimate of the average tread life in miles for the entire population of these tires?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. a group of 50 men (group 1) and 40 women (group 2) were asked if they thought sexual discrimination is a problem in the united states. of those sampled, 11 of the men and 19 of the women did believe that sexual discrimination is a problem. if the p-value turns out to be 0.035 (which is not the real value in this data set), then at = 0.05, you should fail to reject h0. at = 0.04, you should reject h0. at = 0.03, you should reject h0. none of these would be a correct statement.