mechanic sells a brand of automobile tire that has a life expectancy that is normally​ distributed, with a mean life of 27,000 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?   Tires that wear out by ____ miles will be replaced free of charge.

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Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: Mean = 144 Standard deviation = 27

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Q: 1. In a frequency distribution, the last cumulative frequency is 500. Third quartile must lie in…

A: Hey, since there are multiple Question posted, we will answer first questions. If you want any…

Q: A particular fruit's weights are normally distributed with a mean of 598 grams and a standard…

A: Given  mean= 598, standard deviations=34, n=4

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.7…

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Q: Suppose that the value of a stock varies each day from $8.82 to $16.17 with a uniform distribution.…

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Q: A quantitative data set has size 50. At least how many observations lie within three standard…

A: The size of the data set is 50.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.