Find the probability that ed spent longer on assignment

Assignment Help Basic Statistics

Reference no: EM131764131

Question: Ed and Adelaide attend the same high school, but are in different math classes. The time E that it takes Ed to do his math homework follows a Normal distribution with mean 25 minutes and standard deviation 5 minutes. Adelaide's math homework time A follows a Normal distribution with mean 50 minutes and standard deviation 10 minutes. Assume that E and A are independent random variables.

(a) Randomly select one math assignment of Ed's and one math assignment of Adelaide's. Let the random variable D be the difference in the amount of time each student spent on their assignments: D = A - E. Find the mean and the standard deviation of D. Show your work.

(b) Find the probability that Ed spent longer on his assignment than Adelaide did on hers. Show your work.

Reference no: EM131764131

Questions Cloud

Fossil record played important roles : Describe how biogeography, comparative morphology, genomic evidences, and the fossil record played important roles in the development of evolutionary theory.

Determine binomial distribution for probability calculations : Ladies Home Journal magazine reported that 66% of all dog owners greet their dog before greeting their spouse or children when they return home at the end.

Discuss the company estimated uncollectable accounts : During the year, the company estimated uncollectable accounts of $2800. This was increased from last year's estimate of $3200

Report on a new laboratory procedure : A report on a new laboratory procedure, serological, diagnostic test/technique used in a microbiology/medical laboratory, or commercial

Find the probability that ed spent longer on assignment : Ed and Adelaide attend the same high school, but are in different math classes. The time E that it takes Ed to do his math homework follows a Normal.

Where is the limbic system located : Where is the limbic system located? Which structures make up this system? How is the limbic system important in behavior?

Describe the situation with the hr professional : Do you think that a different industry might place more emphasis on another step in the strategic planning process? Why?

Relative roles of both passive and active mechanisms : What is the polarized membrane state? How is it maintained? Note the relative roles of both passive and active mechanisms.

What is the mean number of hispanics in samples : According to the Census Bureau, 13% of American adults (aged 18 and over) are Hispanic. An opinion poll plans to contact an SRS of 1200 adults.

User Account

All Pages