21. Let X have a standard normal distribution. Find P (-1.12 is less than or equal...
Let z be a random variable having a standard normal distribution. Determine P left parenthesis minus 1.56 less than x less or equal than 1.56 right parenthesis.
If the value of x is less than μ for a standard normal probability distribution, then the z-statistic is positive the z-statistic is negative the z-statistic is equal to zero f(x) will be an even number
Let Z be a standard normal random variable. Calculate the following; P(Z is less than or equal to c)= 0.7939
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)
Suppose x has a distribution with a mean of 90 and a standard deviation of 21. Random samples of size n = 36 are drawn. (a) Describe the x distribution and compute the mean and standard deviation of the distribution has ---Select- distribution with meanz - and standard deviation o, - (b) Find the z value corresponding to x = 83. ZE (c) Find P(x < 83), (Round your answer to four decimal places.) P(x < 83) = (d) Would...
Let x be the binomial random variable with n=10 and p = 9 a. Find P(x = 8) and create a cumulative probability table for the distribution. b. Find P( x is less than or equal to 7) and P(x is greater than 7) c. Find the mean, u, the standard deviation, o, and the variance. d. Does the Empirical rule work on this distribution for data that is within one, two or three standard deviations of the mean? Explain....
Let z be a random variable with a standard normal distribution. Find P(0 ≤ z ≤ 0.40), and shade the corresponding area under the standard normal curve. (Use 4 decimal places.)
A candy maker produces mints whose weight follows a normal distribution with mean 21:37g and standard deviation 0:4g. Suppose 15 mints are selected at random. Let Y be the number of mints among them that weigh less than 20:857g. Then, P(Y 2) = 0:816. True False A candy maker produces mints whose weight follows a normal distribution with mean 21.37g and standard deviation 0.4g. Suppose 15 mints are selected at random. Let Y be the number of mints among them...
) X has normal distribution with a mean of 52 and standard deviation 3.5. (a) (9 points) Determine P(X less than or equal to 51) Answer: _____________________________ (b) (8 points) Determine P(X more than 53 or less than 50). Answer: ______________________________ (c) (8 points) Determine P( X being at least 54 but not more than 55). Answer: ________________________________
Let the random variable Z follow a standard normal distribution. Find P(-2.35 < Z< -0.65). Your Answer: