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An accounting professor at a state university in Vermont recently gave a three-question multiple-choice quiz. Each had four optional answers.
a. What is the probability of getting a perfect score if you were forced to guess at each question?
b. Suppose it takes at least two correct answers out of three to pass the test. What is the probability of passing if you are forces to guess at each question? What does this indicate about studying for such an exam?
c. Suppose through some late-night studying you are able to correctly eliminate two answers on each question. Now answer parts a and b.
Level of education attained by the women from a rural region is divided into three categories: can read/write degree; primary degree; secondary and above degree
A group of 20 sales associates agree to go through a week-long sales class to improve their productivity. The amount of their sales are computed for one month before and one month after the training course.
Over many years of administering tests to my statistics students I have found that the overall average of the scores on the first exam that I give each semester is 76.
1. What do discrete random variables describe? 2. Explain joint probability. 3. Explain conditional probability.
A chemical process converts lead to gold. However, the production varies due to the powers of the alchemist. It is known that the process is normally distributed, with a standard deviation of 2.5 g. How many samples must be taken to be 90% certain..
Two balanced dice are rolled and the number of dots facing up is added. Find the probability that the sum is 10 or 12.
use two sums from part A and the computational formal to compute sum of square (SS)for the scores.
The waiting time to place an order at a branch of a fast-food chain during the lunch hour has had population mean of 3.55 minutes, with a population standard deviation of 1.1 minute.
Determine the median, and the standard deviation. Determine the coefficient of skewness using Pearson's method. Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc.
In your environment (business or personal), please describe a hypothesis test related to a decision. What would be your data? What would be your null hypothesis? What would be your alternate hypothesis? What would be your Type 1 and Type 2 errors ..
What is the mean and standard deviation for this groups' SAT verbal score? What is the 95% confidence interval for the mean SAT verbal score for these students?
A quality control engineer wanted to estimate the mean weight (in grams) of M&M candies being produced on a certain machine in the factory. After collecting an appropriate random sample of M&M candies, he obtained the following weights:
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