Question

Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal...



Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal place

x P(x)
0 0.3
1 0.05
2 0.3
3 0.35

2.) A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.2 years, and standard deviation of 2.5 years.

If you randomly purchase one item, what is the probability it will last longer than 9 years?

Round answer to three decimal places

Homework Answers

Answer #2

Please give thumbs up if you like the answer.

answered by: anonymous
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2 years, and standard deviation of 0.5 years. If you randomly purchase one item, what is the probability it will last longer than 2 years? Answer = (Round to four decimal places.)
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.4...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.4 years, and standard deviation of 2.5 years. If you randomly purchase one item, what is the probability it will last longer than 15 years?
A. A manufacturer knows that their items have a normally distributed length, with a mean of...
A. A manufacturer knows that their items have a normally distributed length, with a mean of 11.7 inches, and standard deviation of 1.4 inches. If one item is chosen at random, what is the probability that it is less than 9 inches long? B. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.6 years, and standard deviation of 2.6 years. If you randomly purchase one item, what is the probability it will last...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.7...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.7 years, and standard deviation of 2.9 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.6...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.6 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14 years, and standard deviation of 2.6 years. If you randomly purchase one item, what is the probability it will last longer than 8 years?
Part 1 A manufacturer knows that their items have a normally distributed length, with a mean...
Part 1 A manufacturer knows that their items have a normally distributed length, with a mean of 17.3 inches, and standard deviation of 4.3 inches. If one item is chosen at random, what is the probability that it is less than 26.5 inches long? Part 2 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13.2 years, and standard deviation of 0.9 years. If you randomly purchase one item, what is the probability it...
1.)A manufacturer knows that their items have a normally distributed length, with a mean of 12.9...
1.)A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard deviation of 1.1 inches. If one item is chosen at random, what is the probability that it is less than 14.9 inches long? 2.)A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5 years, and standard deviation of 1.1 years. If you randomly purchase one item, what is the probability it will last longer than...
1. A manufacturer knows that their items have a normally distributed length, with a mean of...
1. A manufacturer knows that their items have a normally distributed length, with a mean of 17.5 inches, and standard deviation of 5.1 inches. If one item is chosen at random, what is the probability that it is less than 14.3 inches long? 2. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6 years, and standard deviation of 0.8 years. If you randomly purchase one item, what is the probability it will last...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.8...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.8 years, and standard deviation of 1.1 years. If you randomly purchase 21 items, what is the probability that their mean life will be longer than 4 years? (Give answer to 4 decimal places.)