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Compare the two sets and describe what you discover. The following data sets shows the ages of the first seven presidents (President Washington through President Jackson)
We will define event D to be {first digit is less than 4}. Using the union and intersection notation, find the following probabilities.(a) P(D)
Because the military budget and the civilian economy are not closely linked, Gain is willing to assume that its military and civilian sales vary independently. Combine your result from (a) with the
Construct a 95% confidence interval for the proportion of cans that are stamped with the phrase and a promotion code. Interpret your findings with respect to the 25% target given to you by Schlepsi.
According to the 68-95-99.7 rule about 95% of all shafts have lengths in the range 11.8 d1 inches. What is the value of d1?
You are playing a board game in which the severity of a penalty is determined by rolling three dice and adding the spots on the up-faces. The dice are all balanced so that each face is equally likel
The weekly salary paid to employees of a small company that supplies part-time labourers averages $700 with a standard deviation of $400. The lowest salary is $300 and the median salary is $500, does
if the number you choose has the same digits as the winning number, in any order. Find the expected payoff for a $1 bet on the box. (Assume that you chose a number having three different digits. Rou
A salesman must select 2 of the first component and 3 of the second to take on a sales call. How many different systems can the salesman select?
How do rented housing units differ from units occupied by their owners? Here are the distributions of the number of rooms for owner-occupied units and renter occupied units in San Jose, California.
In each situation below, is it reasonable to use a binomial distribution for the random variable X? Give reasons for your answer in each case.
What would the constraints be if the Eiffel Tower needed to take place at the same time as the half day at the Louvre and if students taking the Paris Sewer tour.
Record the number of times a player makes both shots in a one-and-one foul-shooting situation. (In this situation, you get to attempt a second shot only if you make your first shot.)
What is the probability that X lies between 61 and 71? Make sure that the rule of thumb conditions are satisfied, and then use a normal approximation to answer the question.
Suppose that James guesses on each question of a 48-item true-false quiz. Find the probability that James passes if each of the following is true.
A federal report finds that lie detector tests given to truthful persons have probability about 0.12 of suggesting that the person is deceptive.
the historical average of $18.75, due to the opening of some new upscale restaurants in the mall. Use the data in the file to test his hypothesis. What is the null hypothesis?
Assuming that the population distribution of returns on individual common stocks is normal, what is the probability that a randomly chosen portfolio of 4 stocks showed a return of at least 3% in 198
What is the standard deviation of Juan's mean result? (That is, if Juan kept on making 6 measurements and averaging them, what would be the standard deviation of all his x's?)
The mean threshold for these subject is x = 31.3. Find the probability of getting a sample mean even farther away from μ than x = 31.3.
Suppose we want to compare the observed and expected number of events among the group with <250 treatments. Perform an appropriate significance test, and report a two tailed p value.
High school dropouts make up 16% of all Americans aged 18 to 24. A vocational school that wants to attract dropouts mails an advertising flyer to 24850 persons between the ages of 18 and 24.
60% reduced risk of Parkinson's disease developing. The study found no such reduction for women. What type of sampling does this represent?
If a sample were drawn by the same method from the state of New Jersey (population 7.8 million) instead of from the entire United States (population 280 million), would this standard deviation be la
Can this statement be true of a vending machine that occasionally dispenses only enough to fill the cup half full (say, 4 oz)? Explain.