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Assume that blood pressue readings are normally distributed with a mean of 116 and a standard deviation of 4.8. If 36 people are randomly selected, find that probability that their mean blood pressure will be less than 118.
x you then repeat this procedure three more times. you learned in class that u_x = u can you conclude that the mean of the four sample mean will be equal to the population mean, 65? why or why not?
Suppose the investor is to invest a total of $10,000, what is the expected value of perfect information for investor.
Assume that the process is in control and that the population of all jar fills is normally distributed. (Round the z-values to 2 decimal places and final answer to 4 decimal places. Negative amounts should be indicated by a minus sign.)
A certain airplane has two alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is.02.
Determination of statistical significance can only be determined by calculating the exact p value and declaring results as significant. True or false?
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
Person repeatedly and independent flips the fair coin to decide whether to take the step to left or to right from a point X. Find out expected number of times person returns to X.
If computing a causal linear regression model of y = a + bX and the resultant r2 is very near zero, then one would be able to conclude that:
Prove that if R is commutative ring and N=(a1,a2,..am) where each ai is a nilpotent element, then N is a nilpotent ideal, i.e N^n=0 for some positive integer n.
Shaver Manufacturing, Inc., offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company rnadomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
What is the probability that in any particular cookie being inspected five or more chip parts will be found if the mean number of chip parts per cookie is 6.3.
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