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x‾ vs. M The mean height of all 1000 employees at an office is 170 cm.
A height sample of 50 people from this office has a mean of 185 cm. Which number is m and which is x?
Supposes that the diameter of bearings are independent normally distributed random variables with mean µB = 1.005cm and variance σ²B = (0.003)² cm² . The diameter of shafts are independent normally distributed random variables having mean µB = 0.9..
pens are sold in packets of 15 pens per packet. the pens are of different colour and 20 are red.a show the the
If you estimate a regression using OLS, but you do not include an intercept, do you know if the mean of the residuals is zero? Explain.
in basketball a players free throws percentage ft is expressed as a number between 0 and 1 which represents the
Based on point estimate of each sample. Explain how confidence intervals will change depending on whether population standard deviation is known or unknown.
After a visit from his mother, he adds oranges to his diet. Oranges cost $0.56/pound in 1995. Here are the food faddist's food purchases in 2005.
what is differential analysis? what part does it play in making specific business decisions?
Pareto charts. Pareto charts are bar graphs with the bars ordered by height. They are often used to isolate the "vital few" categories on which we should focus our attention. Here is an example
Continuing with the ECCO company from Problem, when a customer returns one of the alarms under warranty, the quality manager logs data on the product.
Industrial experiment. Engineers at a computer production plant tested two methods for accuracy in drilling holes into a PC board.
using a standard deck of 52 cards explain why the situation of drawing a 7 and a club is not collectively
a researcher reported a correlation of 1.25 between an iq test and grades in epy 6214. which one of the following
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