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A survey was completed and the following two wage classes were used: ($4 - $7) and ($7 - $10). What is the class interval for these wage classes?
Under a recent U.S. Food and Drug Administration (FDA) standard for food contaminants, 3.5 ounces of tomato sauce can have up to 30 fly eggs, and 11 ounces of wheat flour can contain 450 insect frag
According to Chemical Engineering Progress (Nov. 1990) approximately 30% of all pipework failures in chemical plants are caused by operator error.
In the following functions, evaluate c so that f(x) will be the probability density function:
Let the cumulative distribution function of the random variable Y be given by
The probability density function of the random variable x is given by f(x)= (3/2)x^2, -1<x<1, 0 elsewhere. Find the cumulative distribution function of the random variable X.
Forty-three percent of marriages end in divorce. You randomly select 15 married couples. Find the probability exactly 5 of the marriages will end in divorce.
Tire and Auto Supply is considering a 2-for-1 stock split. Before the transaction is finalized, at least two-thirds of the 1,200 company stockholders must approve the proposal. To evaluate the likel
According to the mendelian theory of inherited characteristics, a cross fertilization of related species of red-and-white flowered plants produces a generation whose offspring contain 25% red flower
justify that each cross fertilization of the red-and white flowered plants is a bernouli trial , let X be the number of red flowered plants in 5 pairs of the cross-fertilized
If Mamma Temte sells he pies for $4 each, what is her expected profit for a day's worth of pies? {Assume that any leftover pies are given away]
Assuming a worst case scenario of 16 male passengers, find the maximum total allowable weight if we want a .975 probability that this maximum will not be exceeded when 16 males are randomly selected
Draw a normal probability plot for the data set derived according to these instructions. SHOW ALL THE CALCULATIONS REQUIRED FOR THIS.
Suppose that 10% of a population is left-handed. What is the probability that in a sample of n=10 individuals,3 or more individuals are left-handed?
Using the definitions from problem 6, define the following terms and how they relate to each other:
Find the z scores that separate the middle 48% of the distribution from the area in the tails of the standard normal distribution
A supermarket receives a shipment of 20,000 cans of beans. The supermarket picks a random sample 100 cans and finds their weights. If the mean of the weights of the cans in the shipment is known to
How many people should she sample to ensure that there is a less than 0.5% chance that over half of the people sampled say they will vote for this party?
Suppose that a company has six plants, which are designated as plant 1, plant 2, ..., plant 6. If sampling occurs without replacement, how many samples of size 3 can be chosen from those plants?
A student earns $14 per hour for tutoring and $7 per hour as a teacher's aid. Let X= the number of hours each week spent tutoring, and y=the number of hours each week spent as a teachers aid. Write
Conduct all 6 steps of an independent-samples t test. Be sure to label all six steps. Report the statistics as you would in a journal article.
What is the treatment degrees of freedom (MST degrees of freedom)? What is the error degrees of freedom (MSE degrees of freedom)? What is the critical value of the F distribution?
Suppose the number of radios in a household has a binomial distribution with parameters n = 12, and p = 80 %. Find the probability of a household having: (a) 7 or 9 radios (b) 7 or fewer radios (c)
Suppose that the number of dice thrown is a binomial random variable with n = 10 and p = 0.98. What is the expected number of spots showing on the thrown dice? Expected number of spots =
The probability that the company will fail within 2 years is 0.5 suppose we follow nine start ups (63 people) for two years and record the number of people whose company fail. Why is the binomial mo