The variable x has a normal distribution with mean mu 75, Ask an Expert

Statistics

The variable X has a normal distribution with mean μ = 75 and standard deviation σ = 6. The variable Y has a normal distribution with mean μ = 70 and standard deviation σ = 8. Variables X and Y are independent.

a. Find the mean and standard deviation of the sum X + Y.

b. Find the mean and standard deviation of the difference X - Y.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92226105

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

How does wholesale banking differ from retail banking in

How does wholesale banking differ from retail banking in terms of: (a) product range; (b) client coverage; (c) marketing; (4) risk management; (5) pricing.

The probability of someone ordering the daily special is 52

The probability of someone ordering the daily special is 52%. If the restaurant expected 96 people for lunch, how many would you expect to order the daily special?

Help me solve the following1 when there is a significant

Help me solve the following 1) When there is a significant difference in the population, but the research fails to find one ...this is what kind of error? 2) Assume that when victims are asked how well their needs were m ...

A researcher determines that students study an average of

A researcher determines that students study an average of 60 15 (M SD) minutes per week. Assuming these data are normally distributed, what is the z score for students studying 45 minutes per week?

Please help with the below questionsbased on the following

Please help with the below questions: Based on the following project assumptions, determine the NPV and the IRR for the project. Equipment invoice $300,000 Transportation and installation $ 85,000 Training $ 20,000 Proje ...

You want to you want to estimate the mean weight of

You want to you want to estimate the mean weight of quarters in circulation. A sample of 30 quarters has a mean weight of 5.649 grams in a standard deviation of 0.066 gram. Use a single value to estimate the mean weight ...

An urn contains 5 red and 10 blue balls balls are drawn

An urn contains 5 red and 10 blue balls. Balls are drawn sequentially from urn without replacement. Let X be the number of draws necessary in order to obtain exactly 4 red balls. Find probability mass function of X

Sals market receives a box of jen amp barrys fast fresh

Sal's Market receives a box of Jen & Barry's Fast Fresh Salad BagsTM. Each box contains 16 Caesar salad bags, 20 tossed salad bags, and 12 shredded cabbage bags. Suppose that each type salad bag has an equal chance of be ...

A pharmaceutical company claims that the average cold lasts

A pharmaceutical company claims that the average cold lasts an average of 8.4 days. They are using this as a basis to test new medicines designed to shorten the length of colds. A random sample of 106 people with colds, ...

Two people agree to meet at a coffee shop they each

Two people agree to meet at a coffee shop. They each independently pick a random moment in time between 8 a.m. and 9 a.m. and show up exactly at their selected time. But they are very impatient, and only stay for 10 minu ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert