What is the probability of sampling a score of    X = 55 or greater from a population with μ = 50 and σ = 15?

A normal distribution has a mean of μ=55 and a standard deviation of σ=6.  What is the probability of selecting a sample of n=16 scores with a mean greater than M=56?

A normal distribution has a mean of µ = 100 with σ = 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 110?​

A random sample of size 36 is taken from a population with mean µ = 17 and standard deviation σ = 6. What are the mean and the standard deviation for the sampling distribution of the sample mean?

A normal distribution has a mean of μ =72 and a standard deviation of σ = 8. What is the probability of selecting a sample of n = 4 scores with a mean less than M = 72?

Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7. Find the 87th percentile.

A sample of n=4 scores has ΣX=8 and ΣX2=40. What is the value of the sample variance, s2?​

A sample obtained from a population with σ = 12 has a standard error of σx̅ = 2 points. How many scores are in the sample?

A population if IQ scores form a normal distribution with a mean of mew=95  and a standard deviation of sigma=15. what is the probability of obtaining a sample mean greater than M=97    c) For a random sample of n=9 people? d) for a random sample of n=25 people?

A sample of n = 8 scores has a mean of M = 16. For this sample, ΣX = 128. Is this true or false?