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A mechanic sells a brand...

A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 28 comma 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?

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Tires that wear out by

_____ miles will be replaced free of charge.

(Round to the nearest mile as needed.)The weights of bags of baby carrots are normally distributed, with a mean of 28 ounces and a standard deviation of 0.36 ounce. Bags in the upper 4.5% are too heavy and must be repackaged. What is the most a bag of baby carrots can weigh and not need to be repackaged?A bag of baby carrots can weigh at most

_____ ounces without needing to be repackaged.The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 266 days and a standard deviation of 12 days.

(a) What is the minimum pregnancy length that can be in the top 12% of pregnancy lengths?

(b) What is the maximum pregnancy length that can be in the bottom 7% of pregnancy lengths?

Click to view page 1 of the table.LOADING... Click to view page 2 of the table.LOADING...

Tires that wear out by

_____ miles will be replaced free of charge.

(Round to the nearest mile as needed.)The weights of bags of baby carrots are normally distributed, with a mean of 28 ounces and a standard deviation of 0.36 ounce. Bags in the upper 4.5% are too heavy and must be repackaged. What is the most a bag of baby carrots can weigh and not need to be repackaged?A bag of baby carrots can weigh at most

_____ ounces without needing to be repackaged.The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 266 days and a standard deviation of 12 days.

(a) What is the minimum pregnancy length that can be in the top 12% of pregnancy lengths?

(b) What is the maximum pregnancy length that can be in the bottom 7% of pregnancy lengths?

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