A normal population has mean μ = 55 and standard deviation σ = 8 . What...

A normal population has mean

μ

=

55

and standard deviation

σ

=

8

. What is the

85

th percentile of the population?

Expert Solution

orchestra answered 2 years ago

Suppose x has a normal distribution with mean μ = 55 and standard deviation σ =...

Suppose x has a normal distribution with mean μ = 55 and standard deviation σ = 7. Describe the distribution of x values for sample size n = 4. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 16. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 100. (Round σx to two decimal places.) μx...

A population has a mean of μ = 70 and a standard deviation of σ =...

A population has a mean of μ = 70 and a standard deviation of σ = 12 For the same population, find the score (X value) that corresponds to each of the following z-scores. z = 0.50: X=_____ z = 1.50: X=_____ z = -2.50: X=_____ z = -0.25: X=_____ z = -0.50: X=_____ z = 1.25: X=_____ A sample has a mean of M = 30 and a standard deviation of s = 7. Find the z-score...

A. A normal random variable has an unknown mean μ and a standard deviation σ =...

A. A normal random variable has an unknown mean μ and a standard deviation σ = 2. If the probability that x exceeds 6.5 is .9732; find μ. B. A standard normal random variable has μ = 0 and a standard deviation σ = 1. Find the probability of less than -2.73. C. A standard normal random variable has μ = 0 and a standard deviation σ = 1. Find the probability greater than 3.28. D. A standard normal random...

Suppose x has a normal distribution with mean μ = 57 and standard deviation σ =...

Suppose x has a normal distribution with mean μ = 57 and standard deviation σ = 12. Describe the distribution of x values for sample size n = 4. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 16. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 100. (Round σx to two decimal places.) μx...

Suppose x has a normal distribution with mean μ = 36 and standard deviation σ =...

Suppose x has a normal distribution with mean μ = 36 and standard deviation σ = 5. Describe the distribution of x values for sample size n = 4. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 16. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 100. (Round σx to two decimal places.) μx...

Suppose x has a normal distribution with mean μ = 52 and standard deviation σ =...

Suppose x has a normal distribution with mean μ = 52 and standard deviation σ = 9. Describe the distribution of x values for sample size n = 4. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 16. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 100. (Round σx to two decimal places.) μx...

Suppose x has a normal distribution with mean μ = 32 and standard deviation σ =...

Suppose x has a normal distribution with mean μ = 32 and standard deviation σ = 12. Describe the distribution of x values for sample size n = 4. (Round σx to two decimal places.) μx = Incorrect: Your answer is incorrect. σx = Describe the distribution of x values for sample size n = 16. (Round σx to two decimal places.) μx = σx = Describe the distribution of x values for sample size n = 100. (Round σx...

Suppose x has a normal distribution with mean μ = 28 and standard deviation σ =...

Suppose x has a normal distribution with mean μ = 28 and standard deviation σ = 4. a) Describe the distribution of x values for sample size n = 4. (Round σx to two decimal places.) μx = σx = b) Describe the distribution of x values for sample size n = 16. (Round σx to two decimal places.) μx = σx = c) Describe the distribution of x values for sample size n = 100. (Round σx to two...

Given a normal distribution with (mean) μ= 50 and (standard deviation) σ = 4, what is...

Given a normal distribution with (mean) μ= 50 and (standard deviation) σ = 4, what is the probability that NOTE: I'd like to learn how to do this in the shortest way possible on ti 84 plus calculator. a) x>43 b) x<42 c) x>57.5 d) 42 <x<48 e) x<40 or x>55 f) 5% of the values are less than what X value? g) 60% of the values are between what two X values (symmetrically distributed around the mean)? h) 85%...

A population has mean μ = 16 and standard deviation σ = 1.5. A random sample...

A population has mean μ = 16 and standard deviation σ = 1.5. A random sample of size n = 49 is selected. What is the probability that the sample mean is greater than 16.8? I got 3.73 for z-value. Please help

Question