During a recent lengthy strike at Morell Manufacturing Company, management replaced striking assembly line workers with office workers. The assembly link workers were being paid $18 per hour while the office workers rare only paid $10 per house. What is the most likely effect on the labor variances in the first month of this str
Determine Earliest Start time (ES), Earliest Finish time (EF), Latest Start time (LS), Latest finish time(LF), and slack time for each activity Solve for: A) Construct a network for this problem B) Determine expected time and variance for each activity C) Determine Earliest Start time (ES), Earliest Finish time (EF), Lates
Please see attached file. Canyonland Boat Charter Services rents live aboard houseboats for cruising on the lake that traverses most of the Glen Canyon National recreation area in Southern Utah. The company bases its overhead cost budgets on the following data: Variable overhead costs: Cleaning $72.50 per charter Maint
Please see attached file. "It certainly is nice to see that small variance on the income statement after all the trouble we've had lately in controlling manufacturing costs," said Linda White, vice president of Molina Company. "The $12,250 overall manufacturing variance reported last period is well below 3% limit we have set
A researcher conducts an independent measures research study and obtains t = 2.070 and df = 28. a. How many participated in this study? b. Using a two-tailed test with .05, is there a difference between the two treatment conditions? c. Compute r2 to measure the percentage of variance accounted for by the treatment ef
Order Up, Inc., provides order fulfillment for dot.com merchants. The company maintains warehouses that stock items carried by its dot.com clients. When a client receives an order from a customer, the order is forwarded to Order Up, which pulls the item from storage, packs it, and ships it to the customer. The company uses a pre
The number of degrees of freedom associated with the t test, when the data are gathered from a matched pairs experiment with 13 pairs, is .... For a set of data, the total variation or sum of squares for y is SST =180, and the error sum of squares SSE =54. What proportion of the variation in y is explained by the regression
Let X1 and X2 have the joint pmf fiven by the following (X1,X2) f(X1,X2) (1,1) 3/8 (2,1) 1/8 (1,2) 1/8 (2,2) 3/8 Find: a.the marginal pmfs, f1(x1) and f2(x2) b. the means, m1 and m2 (mu) c. the variances, (sigma 1)^2 and (sigma2)^2 d. the covariance, sigma(sub 12) e. the correlation coeffiec
Let four random variables X1, X2, X3, X4 have common mean m1=m2=m3=m4= 5 and common variance (sigma 1)^2= (sigma 2)^2= (sigma 3)^2= (sigma4)^2= 6 and common correlation coefficient p(sub ij)= .1, i does not equal j. Determine the mean and the variance of Y=X1 +X2 + X3 + X4
Use the given sample statistics to test the claim about the difference between two population means μ1 and μ2 at the given level of significance α. Assume the samples are random and independent and that the populations are approximately normally distributed, and that the population variances are unequal. Claim: μ1 ≥ μ
Please provide a solution to the following problem: Derive the Mean and Variance of normal and binomial random variable assuming X~N(mean, sigma^2).
Please provide a solution for the following problem: For the daily output of an industrial operation, let Y1 denote the amount of sales and Y2, the costs, in thousands of dollars. Assume that the density functions for Y1 and Y2 are given by (see attachment). The daily profit is given by U =Y1 - Y2. a. Find E(U). b. Ass
A candy store sells 18 candy bars per day on average with a Standard dev. of 3 candy bars per day. The supply company has an average delivery time of two wks with a standard deviation of two days. The candy store is open for business six dys per wk forty eight weeks of the yr. When they order it costs the candy store ten dollars
Approximately 10% of the glass bottles coming off a production line have serious flaws in the glass. If two bottles are randomly selected, find the mean and variance of the number of bottles that have serious flaws.
A) The weights of a random sample of cereal boxes that are supposed to weigh one pound are listed here. Estimate the variance of the entire population of cereal box weights with 90% confidence 1.05 1.03 .98 1.00 .99 .97 1.01 .96
A professor obtains SAT scores and freshman grade point averages (GPAs) for a group of n=15 college students. The SAT scores have a mean of M=580 with SS=22,400 and the GPAs have a mean of 3.10 with SS=1.26 and SP=84. What percentage of the variance in GPAs is accounted for by the regression equation? (Compute the correlation
The weights of a random sample of cereal boxes that are supposed to weigh one pound are listed here. Estimate the variance of the entire population of cereal box weights with 90% confidence. 1.05 1.03 .98 1.00 .99 .97 1.01 .96
Ther are 8 balls in a sample 5 white and 3 black .x is the number of black balls in the sample. three white are selected. white are selected from sample.write the probability distribution and find of x . and find mean , variance and standard derivation.
A random process has sample functions of the form X(t)=A where A is a Rayleigh distributed random variable with mean of 4. A) Is this process wide sense stationary? If so, why? B) Is this process ergodic? If so, why?
Sample functions from a deterministic random process are described by X(t)= At + B t>=0 = 0 t<0 where A is a Gaussian random variable with zero mean and a variance of 9 and B is a random variable that is uniformly distributed between 0 and 6. A and B are statistically independent. A) Find the mean value
1)If the standard deviation is 1.71 what is the variance? 2)Using the probability distribution listed. What is the mean? x 0 1 2 3 P(x) 0.2 0.1 0.3 0.4
How do you do this problem (see attached)?
Please assist so that I can complete this assignment: ?Research your state's criminal procedures and choose a crime to review. (My state is Pennsylvania). ?Locate a state that has a variance in their procedures for the same crime. (Any State). Describe the similarities and differences between the proced
What is the relationship between the variance and the standard deviation? Why is the unbiased estimator of variance used?
Homework #8 Question 1 refers to the finite random variable X, whose p.m.f. is given below. x 0 1 2 4 8 fX(x) 0.1 0.2 0.4 0.2 0.1 Compute the mean, X, variance, V(X), and standard deviation, , of X. Questions 6 and 7 refer to the random variable X which gives the number of customers who visit my busi
Let X1 and X2 denoted independent, normally distributed random variables, not necessarily the same mean or variance. Show that any constants "a" and "b", Y= aX1 + bX2 is normally distributed. Help: ===== I'm not sure if I can just prove it by showing what I have below. where, SX2 ---> INTEGRATION FROM X_2 SX1 ---> INTEG
Find P25 for the following data: 2 6 3 4 2 1 2 0 1 3 6 3 You are given the following frequency distribution for the number of errors 10 students made in a test Errors Frequency 0-2 14 3-5 13 6-8 11 9-11 8 12-14 9 Find: a. mean b. variance c. standard deviation.
What is the 90% confidence interval for the variance of the exam scores for 28 algebra students, if the standard deviation on their last exam was 12.7? a. 122.8 < o < 316.5 b. 108.6 < o < 269.6 c. 10.4 < o < 16.4 d. 123.7 < o < 312.7
From Order Statistics. Please show each step of your solution. You can use technological device(e.g. excel, Maple, or Mathematica, etc) if you want, but please explain your work.
The Excel file provides data on the annual percent changes in the Dow Jones Industrial average, Consumer Price Index, Standard & Poor's 500, and average yield for one-year Treasury bills from 1960 through 1999. Compute the mean and variance for the percent changes in the DJIA and S&P 500 indexes.