Given a normally distributed random variable, X, with mean (μ) and standard deviation (σ) shown on the right, calculate P(a < X < b) where "a" and "b" are shown on right. Round z-scores off to 2 decimals.
μ =15
s = 2
a =16
b =20
Given a normally distributed random variable, X, with mean (μ) and standard deviation (σ) shown on the right, calculate P(X > a) where "a" is shown on right. Round z-scores off to 2 decimals.
μ =17
s = 2
a =16
Given a normally distributed random variable, X, with mean (μ) and standard deviation (σ) shown on the right, calculate P(X < a) where "a" is shown on right. Round z-scores off to 2 decimals.
μ =20
σ = 2
a =16
Given a normally distributed random variable, X, with mean and standard deviation shown on the right, calculate the z-score for a value of X given on the right.
μ =10
s = 2
x =13
Calculate the approximate value Zα for the value of α shown on the right. Round z off to 2 decimal places.
α =0.0985
Given a normally distributed random variable, X, with mean and standard deviation shown on the right, identify what would be considered the "edges" of the distribution as defined by your professor.
μ =13
s = 3
Given a normally distributed random variable, X, with mean (μ) and standard deviation (σ) shown on the right, find the value for "a" such that P(X > a) = p for p given on right. Round Z scores off to 2 decimal places.
μ =20
s = 3
p =0.99
Given a normally distributed random variable, X, with mean (μ) and standard deviation (σ) shown on the right, if a sample of size n were taken, what is the mean of the sampling distribution of the sample mean X-Bar, or E(X-Bar)
μ =30
s = 7
n =49
Given a normally distributed random variable, X, with mean (μ) and standard deviation (σ) shown on the right, if a sample of size n were taken, what is the standard deviation of the sampling distribution of the sample mean X-Bar.
μ =23
s = 7
n =40