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Assume a normal distribution. From the Baltimore facility, 175 samples were obtained and compared with a sample of 168 from the Burlington facility. The mean hours per week and std. deviations for middle management who had been with the facilities for the same length of time were
Baltimore facility Burlington faciilty
Mean 62.5 39.7
Standard dev 23.7 8.9
State your hypothesis and conduct a hypothesis testing using a significance of 0.10
What is your conclusion? And why? Interpret it. Please show all formulas and work!
The U.S. trade deficit with Canada (billions of dollars) from 2000 through 2007 is reported as shown in the table. Using exponential smoothing and the smoothing constant a = 0.7, what deficit would have been forecast for 2008? Source: World Almanac..
Every laptop returned to a repair center is classified according its needed repairs: (1) LCD screen, (2) motherboard, (3) keyboard, or (4) other. A random broken laptop needs a type i repair with probability pi = 24-i /15. Let Ni equal the number ..
six liters 0.006 m3 of liquid h2o at 32 c mass a and one liter 0.001 m3 of solid h2o ice at -32 c mass b are sealed in
The machine currently has ten cans of each type. If 15 customers want to purchase drinks prior to the machine being restocked, what is the probability that each of the 15 is able to purchase the type of drink desired?
Which combination of factors produces smallest risk of Type I error?
a population has a known standard deviation of 25. a simple random sample of 49 items is taken from the selected
Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
christine is currently taking college astronomy. the instructor often gives quizzes. on the past seven quizzes
a number of tubes of toothpaste purchased by a typical family is a random variable having a poisson distribution with
q1.in a recent study of 250 female freshmen showed that 70 did not want to work after marriage. find the 95 confidence
The standard deviation is thought to be $750. How many card holders should be sampled? Your company charges a set dollar amount for each account in the sample.
an iq test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults.
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