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A men's clothing store has ordered 36 shirts with various patterns. Inventory records show 20 different styles of ties currently in stock. How many different arrangements of shirt and tie can be of
Assume the sample represents the entire population of customers. Find the probability that a customer is Not satisfied ans satisfied.
According to a website about salaries, the national average salary as of October 2003 for a human resources clerk was $29,932. We assume that the annual salaries for clerks are normally distributed
Low reliability of the variables reduces the correlation coefficient because:
Low reliability of the variables reduces the correlation coefficient because: a.) the deviation scores are less likely to follow a normal curve
Calculate the z-score for the average height of this team. What is the porbability of a randomly selected team whose average height will be higher than 69.5 inches?
The Public Library has a board of directors consisting of 6 women and 4 men. A 3-member committee from the board is to conduct a search for a new head librarian.
The weekly income of night cashiers at a major department store follows the normal probability distribution. The standard deviation is $45 with a mean of $550.
A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than 5000 hours. To test the claim, a statistician took a random sample of 100 bulbs and measured the amo
What are the observational units in this study? What is the variable in this study? Calculate the test statistic and p-value.
Two balanced coins are flipped. What are the expected value and variance of the number of heads observed?
If the manufacturer's claim is true, what is the probability that the wood treatment on a randomly selected fence lasts a time less than 2540 days? Answer the question in (a) if the standard deviati
You arrive at a bus stop at 8:00 a.m. knowing that the bus will arrive at some time uniformly distributed between 8:45 and 9:03. (a) What is the probability that you will wait at least 40 minutes?
A network engineer is working to improve password strength. If he tells his client that all passwords must contain a combination of numbers (0 - 9) and letters (A - Z).
Assuming that the standard deviation of claims is $500, and set ? =0.05, test to see if the insurance company should be concerned. (One-tailed test) State Null hypothesis
Heights of men on a basketball team have a bell shaped distribution with a mean of 173cm and a standard deviation of 8cm using the empiricle rule what is the approximation percentage of the men bet
Suppose that the x-bar chart is based on samples of size 1. Further, suppose the mean of the quality characteristic shifts one standard deviation, that is u = u0 + sigma, where u0 denotes the in-con
The________ is the process of first stating the basic problem and then developing additional questions by subsequently dissecting the original question from the general to more specific questions.
Your company produces two varieties of self-sealing stem bolts, standard and deluxe. In one year you can produce 365 bolts (of either type). Based on last years sales you might expect to sell four s
Suppose we draw two tickets from a hat that contains tickets numbered 1,2,3,4. Let X be the 1st number drawn and Y be the second. Find the joint distribution of X and Y.
The manager of a manufacturing company believes that experience is the most valuable variable in determining a worker's productivity. She collects data on productivity of 10 workers with known numbe
The following experimental data relates the observed temperature change as a function of laser amplitude. Fit a first-order polynomial to these data.
Assuming n= E(Y|X) = beta0- Beta1X, the least squares estimates of beta0 and beta1 and hence the least squares estimate of n. Construct 95% confidence intervals for beta0, beta1, and n0 = beta0 +bet
The residents of a housing development for senior citizens have completed a survey in which they indicated how physically active they are (X) and how many visitors they receive each week. You find
A chemical Engineer wants to fit a straight line to the data found observing the tensile strength, Y, of 10 test pieces of plastic that have undergone baking (at a uniform temperature) for X minutes