Katie F.

asked • 05/28/19

stats questions help!!

1.) A particular fruit's weights are normally distributed, with a mean of 791 grams and a standard deviation of 8 grams.


If you pick one fruit at random, what is the probability that it will weigh between 780 grams and 806 grams?


2.) A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.3 years, and standard deviation of 0.7 years.


The 9% of items with the shortest lifespan will last less than how many years?


3.) In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 54.3 inches, and standard deviation of 8.1 inches.


What is the probability that the height of a randomly chosen child is between 37.35 and 63.15 inches? Do not round until you get your your final answer, and then round to 3 decimal places.

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