Question

X is a normal random variable with unknown mean μ and standard deviation σ = 5....

X is a normal random variable with unknown mean μ and standard deviation σ = 5.

(a) Find the margin of error E in a 95 percent confidence interval for μ corresponding a random sample of size  

(b) What size sample would be needed to have a margin of error equal to 1.5?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
a.)A normal random variable X has unknown mean μ and standard deviation σ = 6. What...
a.)A normal random variable X has unknown mean μ and standard deviation σ = 6. What is the margin of error E for a 98 percent confidence interval for μ, based on a random sample of size b.)(b) What sample size would be needed in part (a) to have a margin of error
A random variable ?x has a Normal distribution with an unknown mean and a standard deviation...
A random variable ?x has a Normal distribution with an unknown mean and a standard deviation of 12. Suppose that we take a random sample of size ?=36n=36 and find a sample mean of ?¯=98x¯=98 . What is a 95% confidence interval for the mean of ?x ? (96.355,99.645)(96.355,99.645) (97.347,98.653)(97.347,98.653) (94.08,101.92)(94.08,101.92) (74.48,121.52)
X is a normal random variable with mean μ and standard deviation σ. Then P( μ−...
X is a normal random variable with mean μ and standard deviation σ. Then P( μ− 1.2 σ ≤ X ≤ μ+ 1.9 σ) =? Answer to 4 decimal places.
A normal random variable x has an unknown mean and standard deviation. The probability that x...
A normal random variable x has an unknown mean and standard deviation. The probability that x exceeds 4 is 0.975, and the probability that x exceeds 5 is 0.95. Find μ and σ.
given normal random variable x with mean μ= 57.1 and standard deviation σ=13.2, what is P...
given normal random variable x with mean μ= 57.1 and standard deviation σ=13.2, what is P (46 < x̄ < 69) for a sample of size n= 16?
Answer the question for a normal random variable x with mean μ and standard deviation σ...
Answer the question for a normal random variable x with mean μ and standard deviation σ specified below. (Round your answer to one decimal place.) μ = 38 and σ = 8. Find a value of x that has area 0.01 to its right.
Suppose X is a normal random variable with mean μ = 100 and standard deviation σ...
Suppose X is a normal random variable with mean μ = 100 and standard deviation σ = 7. Find b such that P(100 ≤ X ≤ b) = 0.3. HINT [See Example 3.] (Round your answer to one decimal place.) b =
A normal random variable x has mean μ = 1.6 and standard deviation σ = 0.19....
A normal random variable x has mean μ = 1.6 and standard deviation σ = 0.19. Find the probabilities of these X-values. (Round your answers to four decimal places.) 1.00 < X < 1.20 X > 1.37 1.35 < X < 1.50
A normal random variable x has mean μ = 1.7 and standard deviation σ = 0.16....
A normal random variable x has mean μ = 1.7 and standard deviation σ = 0.16. Find the probabilities of these X-values. (Round your answers to four decimal places.) (a) 1.00 < X < 1.50 = (b) X > 1.35 = (c) 1.45 < X < 1.50 =
Problem 6. A random variable x has a Normal distribution with an unknown mean and a...
Problem 6. A random variable x has a Normal distribution with an unknown mean and a standard deviation of 12. Suppose that we take a random sample of size n = 36 and find a sample mean of "x-bar" = 98. What is a 95% confidence interval for the mean of x?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT