l The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2600 miles. What is the probability a particular tire of this brand will last longer than 57,400 miles? 0.1587 0.8413 0.2266 0.7266 QUESTION 10 5| Find the probability that a zscore will be more than 2.30. 0.0701 0.0107 0.9299 0.0487 QUESTION 11 5| Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the bottom 20% from the top 80%. / \\ 87.4 87.9 88.7 86.1 QUESTION 12 5| Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation of 1.1 years. Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 9.1 years. 0.4279 0.0641 0.4357