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Question: 1. Fifty percent of the components coming off an assembly line fail to meet specifications for a special job. It is desired to select three units which meet the stringent specifications. Items are selected and tested in succession. Under the usual assumptions for Bernoulli trials, what is the probability the third satisfactory unit will be found on six or fewer trials?
2. The number of cars passing a certain traffic count position in an hour has Poisson (53) distribution. What is the probability the number of cars passing in an hour lies between 45 and 55 (inclusive)? What is the probability of more than 55?
A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:
The length of the thorax (where the wings and legs attach) in a population of male fruit flies is approximately Normal with a mean 0.800 (mm) and standard deviation 0.078 mm. What proportion of flies have thorax length 0.9 mm or longer?
Identify statistical hypotheses/tests that could be used to provide useful information for your research. Comparing the means or proportions of one group to a population or of two or more groups, Calculating correlation and regression between two (or..
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
an ad is placed in newspapers in four counties asking for volunteers to test a new medication for reducing blood
Compose a persuasive thesis about a DC Comicssuper-hero (not a villain) which is approximately 100 words written in the present tense. The thesis mustconnect an aspect [only one] of the character (i.e. origins, powers, personality, creators, symbolis..
Given a binomial distribution with n = 8 and p = 0.40, obtain the following: the probability that the number of successes is larger than the mean.
The preceding Markov chain is called a random walk for we may think of it as being a model for an individual walking on a straight line who at each point of time either takes one step to the right with probability p or one step to the left with pr..
We code middle-aged Americans as 1 and senior citizens as 0, the logistic regression model for senior citizens
How many customers must the restaurant have, on the average, to be at least 95 percent sure that the number of customers ordering pie on that day falls in the 19 to 21 percent range?
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
A teacher gives a pre and post test to her students, she wants to know if there is a difference in the number of points students earned on their pretest and post test.
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