Z = (x - mean) / SD
Z = -1.8
Or, (x - mean) / SD = -1.8
Or, (x - 5) / 2.2 = -1.8
Or, x = 1.04
suppose x~N(5,2.1). what x- value is 1.8 standard deviations to the left of the mean? round...
Suppose X~N(4, 2). a) What value of x is 1.5 standard deviations to the left of the mean? b) What is the 90th percentile of X? Express your answers with 3 decimals.
A)What is the z-score of x = 4, if it is 1.9 standard deviations to the left of the mean? (Enter an exact number as an integer, fraction, or decimal.) z = B) What is the z-score of x = 5, if it is 0.166 standard deviations to the left of the mean? (Enter an exact number as an integer, fraction, or decimal.) z = C) Suppose X ~ N(12, 1). What value of x has a z-score of −2.25?...
Suppose X is a normal random Variable with mean p = 46 and standard deviations 11 (a) Compute the z-value corresponding to X = 30 (1) Suppose the area under the standard normal curve to the left of the value found in part(a) is 0.0729. What is the area under the normal curve to the left of X (c) What is the area under the normal curve to the right of X=30? 307 (Round to two decimal places as needed)
Suppose X ~ N(3, 2). What value of x is two standard deviations to the right of the mean? (Enter an exact number as an integer, fraction, or decimal.) x =
Suppose X ~ N(4, 2). What value of x is two standard deviations to the right of the mean? (Enter an exact number as an integer, fraction, or decimal.)
Suppose x has a normal distribution with mean = 18 and standard deviation 0 - 13. Describe the distribution of x values for sample size n = 4. (Round o; to two decimal places.) Describe the distribution of x values for sample size n = 16. (Round o; to two decimal places.) Describe the distribution of x values for sample size n = 100. (Round o; to two decimal places.) How do the x distributions compare for the various samples...
Suppose x has a normal distribution with mean μ = 28 and standard deviation σ = 13. 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 is a normal random variable with mean u = 50 and standard deviation o = 11. (a) Compute the z-value corresponding to X = 36. (b) Suppose the area under the standard normal curve to the left of the Z-value found in part (a) is 0.1016. What is the area under the normal curve to the left of X = 36? (c) What is the area under the normal curve to the right of X = 36? (a)...
Find the number of standard deviations from the mean. Round your answer to two decimal places 12) The annual snowfall in a town has a mean of 33 inches and a standard deviation of 12 inches. Last year there were 69 inches of snow. How many standard deviations from the mean is that? Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if its...
Suppose X is a normal random variable with mean p = 64 and standard deviation o=6. (a) Compute the z-value corresponding to X = 56. (b) Suppose the area under the standard normal curve to the left of the Z-value found in part (a) is 0.0912. What is the area under the normal curve to the left of X= 56? (c) What is the area under the normal curve to the right of X= 56? (a) z= (Round to two...