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In an introductory statistics class there are 4 freshmen and 6 sophomores. An examination is given, and the students are ranked according to their performance. Assume that no two students obtain the same score.
(a) How many different rankings are possible?
(b) If the freshmen are ranked just among themselves and the sophomores just among themselves, how many different rankings are possible?
in a group lineup of 7 models in a commercial 3 are male and 4 are female. in how many ways can you arrange 3 models in
The following table gives the distribution of the number of servings of fruits and vegetables per day in a population.- Find the mean and the standard deviation for this random variable.
Throughout the company's franchises, the probability is 0.60 that a meal will be served within 45 seconds. What is the expected number of coupons a counter employee will receive when serving the regional manager?
You are to find the state-machine diagram for the following electronic vending-machine specification. The vending machine sells jawbreaker candy, one jawbreaker for 25¢.
Calculate the net proceeds and the underwriter's spread on the stock offering.
What is the population of interest?- What is the population parameter of interest?- What is the sample?- What is the value of the sample statistic?
A sociology professor is interested in studying the mean number of hours,that a day student spends per week studying.This number is believed
Happiness Using the table in Exercise , determine whether being unhappy is independent of disagreeing with the statement for this sample.
Suppose that the probability is 1 in 3,900,000 that a single auto trip in the U.S. would result in the death of the driver. Over a lifetime, an average U.S. driver takes 50,000 trips.
A test result x
With the rising wages within China, will U.S. and China will actually go into a trade war?
Toss a pair of dice two times. Consider tossing a pair of fair dice two times. For each of the following pairs of events, tell whether they are disjoint, independent, or neither.
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