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Suppose we draw 13 cards out of a deck of 52. What is the expected value of the number of aces we get?
A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share?
Annual family dental expenses for the families of a random sample of ten employees of a company are given below. You can assume the family dental expenses for the employees of the company are normally distributed.
The Bee line Café is well known for its popular homemade ice cream, which it makes in a small plant in back of the café. People drive long distance to buy the ice cream.
For the following scores, find the (A) mean, (B) median, (C) sum of squared deviation (d) variance, and (e) standard deviation:
assume the readings on thermometers are normally distributed with a mean of 0 degrees celsius and a standard deviation
Which would be inappropriate, and why. Then identify what you think is the best measure of variability to use for your example and explain why you believe it to be better than the others.
Is this a proper probability density function? How do you know? Find the mean, variance, and standard deviation of x, showing your work.
The Republican party is interested in studying the number of Republicans that might vote in a particular Congressional district. Assume that the number of voters is binomially distributed by party affiliation (either Republican or not Republican).
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
A research study comparing college alcohol use in the United States and Canada reports that more Canadian students drink but American students drink more Is this study an example of an experiment? Explain why or why not.
two cars leave towns 1000 kilometers apart at the same time and travel toward each other. one cars rate is 14
The critical value of F at 95% confidence when there is a sample size of 21 for the sample with the smaller variance, and there is a sample size of 9 for the sample with the larger sample variance is:
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