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The amount spent worldwide in advertising on mobile devices can be estimated by f(x) = 0.4x2 + 0.01x + 0.9, where x is the number of years after 2005 and f(x) is in billions of dollars. When will worldwide mobile ad spending reach $41 billion?
In certain normal distribution of scores, mean is 50 and standard deviation is 4. Determine z-score corresponding to a score of 55.
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
of three cards one is painted red on both sides one is painted black on both sides and one is painted red on one side
a certain brand of flood lamps has a lifetime that has a normal distribution with a mean of 3750 hours and a standard
What is the formula used to get percentile from z-score? I have z-scores but am using excel and want to be able to type in a formula to figure percent instead of coming here and continuing to figure it out.
Verify value of t for the independent Variable, using formula. (That is, using formula in the Formula Sheet compute the t statistic , given data provided in the print out).
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Determine the average number of people you should ask in order to determine someone with same birtheday as yours.
Create ADM/PERT diagram. Determine the critical path.
Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 10 classes.
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and the standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the possibility that th..
The sample proportion and the sample standard deviation are all unbiased estimators of the corresponding population parameters - variance of the standard normal distribution
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