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The GMAT scores of MBA students is assumed to be distributed normally with a mean of 530 and a standard deviation of 80. The GMAT scores of ten students are selected randomly. What is the probability that at least 7 of the 10 students have SAT scores in excess of 550?
Define irregular component in time series and explain the differences between other components as well as its effects.
Calculate the sample mean and sample standard deviation.
Cards are drawn one by one from a standard deck of 52 cards. Let X be the number of draws up to and including when the first diamond is drawn. If the cards are replaced in the deck, determine E(X). If the cards are not replaced in the deck, determ..
206 randomly selected light bulbs were tested in a laboratory, 161 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
Using one mean Z test to test whether or not to support the claim - Is there evidence that the average hours is below 6? Describe.
In an effort to counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the students in the class.
A particular bulb is turned on once each evening for an average of 10 hr. If it is desired to have a reliability of 90 percent, what is its design life in days?
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
How would the General Counsel's decision in Part (b) change if the cost of selling the second suit were only $200,000? What if the cost were $900000?
1. What do discrete random variables describe? 2. Explain joint probability. 3. Explain conditional probability.
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
If you randomly assign participants to groups, can you suppose the groups are equivalent at the beginning of the study?
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