Let X have a normal distribution with µ=10 and σ=2. Determine the probability or area in the normal curve for which P(8<X<12).
a)0.75
b)0.2275
c)0.05
d)0.6827
Let X have a normal distribution with µ=10 and σ=2. Determine the probability or area in...
Let X have a normal distribution with µ=10 and σ=2. Determine the probability or area in the normal curve for which P(8<X<12).
Let X have a normal distribution with µ=10 and σ=2. Transform X to the standard normal form Z. Match P(X>14). a) p(z<-1) b) p(z<-2) c) p(-2<z<2) d) p (z>2)
Determine the area under a normal distribution curve with µ = 55 and σ = 7 to the right of x = 68. Be sure to draw a normal curve with the area corresponding to the probability.
Given a normal distribution with µ = 100 and σ = 10, if you select a sample of n = 25, what is the probability that ? is Between 95 and 97.5? (a) 0.9878 (b) 0.0994 (c) 0.9500 (d) 0.8616 8. Given a normal distribution with µ = 100 and σ = 10, if you select a sample of n = 25, there is a 64.8% chance that ? is above what value? [Hint find A such that P(?� >A)=0.648]...
Given a standard normal distribution (SND) with µ = 70 and a σ = 10, what is the area under the curve above X1 = 70? Given a standard normal distribution (SND) with µ = 70 and a σ = 10, what is the area under the curve above Z1 = 0?
A normal distribution has a mean of µ = 70 with σ = 10. If one score is randomly selected from this distribution, what is the probability that the score will be greater than X = 82? a.0.3849 b.0.7698 c.0.1151 d.0.8849 n a sample with M = 40 and s = 8, what is the z-score corresponding to X = 38? a.–0.25 b.+ 0.25 c.0.50 d.–0.50 In a population of N = 10 scores, the smallest score is X =...
Let X have a normal distribution with mean μ and variance σ ^2 . The highest value of the pdf is equal to 0.1 and when the value of X is equal to 10, the pdf is equal to 0.05. What are the values of μ and σ?
For a normal distribution of raw scores with µ= 75, σ = 8, answer the following. What is the probability of p(71 < X < 83) ? __________ Find the percentile ranking for the raw score X = 65th ______ percentile
Let X_1, X_2, ..., X_21 be a random sample from a normal distribution with µ = 10, σ^2 = 4. Using the chi-square distribution, find P(2 < S^2 < 8)
Suppose the heights of adult males in a population have a normal distribution with mean µ = 71 inches and standard deviation σ = 3 inches. Two unrelated men will be randomly sampled. Let X = height of the first man and Y = height of the second man. (a) Consider D = X − Y , the difference between the heights of the two men. What type of distribution will the variable D have? (b) What is the mean...