The mean tread life of a tire is 30,000 miles with a standard deviation of 2000 miles. Tire tread life is normally distributed. b) What percent of tire treads will last less than 28,000 miles?
c) What percent of tire treads will last between 26,000 and 32,000 miles?
d) What percent of tire treads will last more than 34,000 miles?

11 the given information as follows: mean == 30000 standard deviation = = 2000 a) emperical rule according to emperical rule of probability about 68% data fall within 1 standard deviation from the mean

Step-by-step explanation:

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start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: