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Use the completed chart to answer these questions.
a. According to the 1990 U.S. Census, about 30% of people aged 25 to 44 live alone. In a random sample of 40 people aged 25 to 44, would it be plausible to get 20 who live alone?
b. We select a random sample of size 40 and get a sample proportion of 0.90 successes. Is this sample proportion plausible if the population has 75% successes?
c. According to the 1990 U.S. Census, about 80% of men aged 20 to 24 have never been married. In a random sample of 40 men aged 20 to 24, how many unmarried men is it plausible to get? What proportion of unmarried men is it plausible to get?
d. Suppose you flip a coin 40 times; how many heads is it plausible for you to get? e. In the 1992 presidential election, Bill Clinton got 43% of the vote. In a random sample of 40 voters, what is the largest proportion of people who voted for Clinton that it is plausible to get? the smallest?
A shock can cause the failure of component 1 alone with probability p, component 2 alone with probability q, both components with probability r, or have no effects with probability 1-p-q-r. Suppose no repairs are possible and the system fails when..
the annual assets for first michigan corporation is aproximately normally distributed with standard deviation 50. the
Calculate the corrected mean and corrected standard deviation.
The following examples are experiments and their associated random variables. In each case identify the values the random variable can assume and state whether the random variable is discrete or continuous:
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
If you were going to conduct the study again, what could you do to provide a more powerful test of your hypothesis?
Capital punishment law is among the most complex bodies of law in the US. As a result of frequent errors, the Trial Judges Assn. has developed a special training course to try to cut down on the errors.
How accurate has the forecast been? Do you think this difference matters to a beach town? Can you develop a forecasting system model that may be more accurate?
With reference to Exercise 39, show that for normal distributions κ2 =σ2 and all other cumulants are zero.
a delegation of 3 is selected from a city council made up of 4 liberals and 5 conservatives. what is the expected
What is the probability that no requests for assistance are in the system? What is the average number of requests that will be waiting for service? What is the average waiting time in minutes before service begins?
in a sample of 30 elves the correlation between years of employment and cookie productivity was found to be -0.25.a
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