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QUESTION PART A: A manufacturer knows that their items have a normally distributed lifespan, with a...

QUESTION PART A: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6.6 years, and standard deviation of 0.8 years.

If 22 items are picked at random, 6% of the time their mean life will be less than how many years?

Give your answer to one decimal place.

QUESTION PART B: A particular fruit's weights are normally distributed, with a mean of 679 grams and a standard deviation of 19 grams.

If you pick 13 fruits at random, then 5% of the time, their mean weight will be greater than how many grams?

Give your answer to the nearest gram.

Math   Statistics-And-Probability   
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