Calculate x if z = negative 2.88, mu = 42 and sigma = 7.18. Round answer to 2 decimal places. x = mu + zsigma
Calculate x if z = negative 2.88, mu = 42 and sigma = 7.18. Round answer...
Evaluate the formula z equals Start Fraction x overbar minus mu Over Start Fraction sigma Over Start Root n End Root End Fraction End Fraction z= x−μ σ n when mu μ equals = 118, n = 22, x overbar x equals = 123, and sigma σ equals = 2 2. z = nothing (Round to three decimal places as needed.)
Determine mu Subscript x overbarμx and sigma Subscript x overbarσx from the given parameters of the population and sample size. muμequals=90 sigmaσequals=19 nequals=32 mu Subscript x overbarμxequals=nothing sigma Subscript x overbarσxequals=nothing (Round to three decimal places as needed.)
Assume the random variable x is normally distributed with mean mu equals80 and standard deviation sigma equals 5. Find the indicated probability. P(68less thanxless than71) P(68less thanxless than71)equals nothing (Round to four decimal places as needed.)
1. X ~ N(mu = 3,sigma=10) Y=2X+4 E(Y) = ? 2. X ~ N(mu = 3,sigma=10) Y=2X+4 V(Y) = ? 3. If X and Y are independent then E(XY) =E(X)*E(Y) True or False? 4. If Cov(X,Y) = 0 then X and Y are independent True or False? 5. If Y_1 ~ N( 1, sigma =2) and Y_2 ~ N(-2, sigma^2 = 16) and Y_1 is independent of Y_2. If l = 2Y_1 - 3Y_2 find E(l) 6. If Y_1 ~...
Suppose a normally distributed numerical variable X has MU = 15 and Sigma = 6. Answer the following questions about the sampling distribution of the mean if the sample size is 100. 1. The sampling distribution of X bar is (blank) distributed with mu X bar = (blank) and sigma X bar = (blank). (fill in the blanks) 2. Suppose a random sample is chosen. what is the probability that this selected sample mean is less than 14.2? 3. What...
what is the appropriate z sigma / 2 for 73.8% confidence interval for mew round response to 2 decimal places
1) given mu = 20 and sigma = 3 a) probability(x<18) b)probability(x>21) 2) given mu = 50 and sigma = 4 a) find 90% confidence interval b) find 94%
If X(t), t>=0 is a Brownian motion process with drift mu and variance sigma squared for which X(0)=0, show that -X(t), t>=0 is a Brownian Motion process with drift negative mu and variance sigma squared.
Consider the hypotheses shown below. Given that x overbar= 48 ,sigma=13 , n=33, alpha=0.10 , complete parts a and b. Upper H 0: mu less than or=45 Upper H 1: mu greater than 45 a. What conclusion should be drawn? b. Determine the p-value for this test. a. The z-test statistic is . (Round to two decimal places as needed.)
Consider the hypotheses shown below. Given that x overbar= 40 ,sigma=11 ,n=33, alpha=0.10 , complete parts a and b. Upper H 0 : mu less than or=38 Upper H 1: mu greater than38 a. What conclusion should be drawn? b. Determine the p-value for this test. a. The z-test statistic is . (Round to two decimal places as needed.) The critical z-score(s) is(are) . (Round to two decimal places as needed. Use a comma to separate answers as needed.) Because...