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A student comes to class with four different colored balls of identical shape and size in her pocket. She has decided to draw one ball from her pocket per question and allow the color of the ball to select the answer for each question. What type of probability distribution can be used to figure out her chance of getting 10 questions right?
What percentage of architects have Z scores (a) above .10, (b) below .10, (c) above .20, (d) below .20, (e) above 1.10, (f) below 1.10, (g) above -.10, and (h) below -.10?
The sampling plan is perhaps the single most important aspect of generalizing research findings beyond the study sample. In a quantitative research study, what method of sampling allows for the greater generalization of findings?
Test of product quality using human inspectors can lead to serious inspection error problems. To evaluate the performance of inspectors in a new company, a quality manager had a sample of 12 novice inspectors evaluate 200 finished products.
Compare a three-month moving average forecast with an exponential smoothing fore-cast for a = 0.2. Which provides the better forecasts using MSE as the measure of model accuracy?
When 40 people used the Weight Watchers diet for one year, their weight losses had a standard deviation of 4.9 lb (based on data from "Comparision of the Atkins, Ornish, Weight Watchers, abd Zone Diets for Weight Loss and Heart Disease Reduction, ..
If X and Y are infinite sets with the same number of elements, show that the following conditions are equivelent for a function f: X-->Y:
Do the above values appear to be in statistical control, justify your answer?
If a time series is stationary without a linear trend or the seasonal component, which of the following forecasting methods may be suitable.
Suppose that the two lists are combined to produce a new list of 18 values. What is the average (mean) of this new list?
What is the difference between strong positive and strong negative correlation? Is there value in a strong negative correlation? If so, what? In your answer provide examples from your life.
Which measure of association do you use to compare the relationship between these variables? Why?
Assume that the distribution of heights of adults American normally distributed, with mean 69 inches and standard deviation 2.8 inches.
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