A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 34,000 miles and a standard deviation of 2200 miles. He wants to give a guarantee for free replacement of tires that don't wear well. How should he word his guarantee if he is willing to replace approximately 10% of the tires? Click to view page 1 of the table. Click to view page 2 of the table. Tires that wear out by miles will be replaced free of charge. (Round to the nearest mile as needed.)

Cars on I-40 have a mean speed of 73 MPH at a certain mile marker, with a standard deviation of 8 MPH. What Percentage of Cars averaged at least 78 mph?

The body temperatures of adults are normally distributed with a mean of 98.6° F and a standard deviation of 0.27° F. What temperature represents the 95th percentile? Click to view page 1 of the table. Click to view page 2 of the table. OA. 99.04° F OB. 98.95° F OC. 98.16° F O D. 99.13° F C

One year consumers spent an average of ​$22 on a meal at a resturant. Assume that the amount spent on a resturant meal is normally distributed and that the standard deviation is ​$3. Complete parts​ (a) through​ (c) below. Between what two values will the middle 95​% of the amounts of cash spent​ fall?

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Accrotime is a manufacturer of watches. Accotime researchers have shown that watches hwe an average life of 28 months before certain electronic components deteriorate causing the watch to become unreliable. The standard deviation of watch lifetimes is 5 months and the distribution is noemal. If Accrotime guarantees a full refund of any defective watch for 1.5 years after the purchase, what percentage of total production will the company expect to replace? Write your answer as a percentage rounded to 1 decimal place. For the toolbar, Press ALT+F10 (PC) or ALT+FN+F10 OMCA) 0 WOAOS POWEASD BY TINY

Create a data set with ten observations so that the standard deviation is 0.5. Record a graph of your data. Grab one of the points with your mouse cursor and move it away from the rest of the data. How does the standard deviation change? Is the standard deviation resistant Create a data set with ten observations so that the standard deviation is as large as possible. What is the largest standard deviation you are able to achieve? Record a graph of your data. Create a data set with ten observations so that the standard deviation is as small as possible. What is the smallest standard deviation you are able to achieve? Record a graph of your data.

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z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?