Mathematics, 13.04.2020 05:23 cruzc2
1. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.6 years, and standard deviation of 1.1 years.
If you randomly purchase 8 items, what is the probability that their mean life will be longer than 3 years?
2. A particular fruit's weights are normally distributed, with a mean of 440 grams and a standard deviation of 39 grams.
If you pick 9 fruit at random, what is the probability that their mean weight will be between 411 grams and 432 grams
3. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.3 years, and standard deviation of 2.7 years.
If 25 items are picked at random, 2% of the time their mean life will be less than how many years?Give your answer to one decimal place.
Answers: 2
Mathematics, 21.06.2019 17:30
At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?
Answers: 1
Mathematics, 21.06.2019 22:30
Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?
Answers: 1
1. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.6 ye...
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