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To compare the effects on energy intake of drinking wine either before or with a meal, 11 men participated in a laboratory study. On each day of three day trial-period, participants were given break
However, of the products that were not successful, 20 percent of the time market research was used. If market research is performed for a new product, what is the probability that the product is act
Suppose the lifetime of a particular appliance follows an exponential distribution with a mean of 10 years. What is the probability that the appliance will fail in less than 5 years?
There is a 10% chance of the part being defective if provided by Company A, a 30% chance of the part being defective if provided by Company B, and a 70% chance of the part being defective if provide
The monthly earnings of computer programmers are normally distributed with a mean of $4,000. If only 1.7% of programmers have monthly incomes of less than $2,384, what is the value of standard devia
Suppose that two fair (i.e., the probability of both Heads and Tails is 0.5) coins are tossed, and we observe the results. There are 4 possibilities: {H, H}, {H, T}, {T, H}, {T, T}. Assume a H wins
List the three null hypotheses for this test (words and symbols). Which of the null hypotheses were rejected? Sketch a graph of these results.
A company's construction time follows a normal distribution. The mean time to construct a building is 100 days and the standard deviation is 20 days.
Forty percent of all high school graduates work during the summer to earn money for college tuition for the upcoming fall term. Assuming a binomial distribution, 10 students are selected at random,
You want to test the hypothesis that Bay Area students are less likely to have tattoos than the state average. You survey 10 Bay Area students and find that 2 of them have tattoos. How likely is it
If a random variable can take on a countable number of values, one would use a discrete distribution.
The number of customers at Quiet Morning Bakery is believed to follow a Poisson distribution with a mean of 2 customers per minute. During a randomly selected five minute interval, what is the proba
If a random variable can take on a measurable infinite number of values (such as a person's weight, height, or temperature), one would use a discrete distribution.
In a random sample of 5 parts on an assembly line, the probability that one of the parts is defect is 15% and follows a binomial distribution. What is the probability of 3 parts being defective?
The test for this drug is 90% accurate for users of the drug. (This means 90% of the tests come back positive if the person uses the drug). What is the probability that an athlete tests positive and
The Qwik Market & Branding Company has found the following results of married people in a taste test of a popular high energy drink. Given that a husband prefers the drink, what is the probabili
The performance of quality inspectors affects both the quality of outgoing products and the cost the products. A product that passes inspection is assumed to meet quality standards; a product that f
Let X be normally distributed random variable with mean u and variance s2= 4.84. Determine the the size of the sample required to be 90% confident that the error in the estimation is of u is at most
The objective is to draw a constant draft of 23 million gallons per month from this river. How large would the impoundment have to be to provide such a water supply for Springfield during this droug
Based on available information, lead time demand for CD ROM drives averages 250 units (normally distributed), with a standard deviation of 25 drives. Management wants a 98% service level. How many d
Use zero through third order taylor series expansions to predict f(2) for the function f(x)=25x^3-6x^2+7x-88 Using a base point at x=1. compute the true percent relative error for each approximation
Consider the game where two dice, die A and die B, are rolled. we say that die A wins, and write A > B, if the outcome of rolling A is larger than that of rolling B. If both rolls result in the s
There is a 25% chance that a fuse of a certain type is defective. Approximate the probability of having more than or equal to 15 defective fuses in a box containing 30 fuses.
Using the CV, compare the variability of the two items. Suggest reasons for any differences