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Refer to given Example, in which for a sample of 1003 American adults, .56 was the proportion who think that it is somewhat or very likely that intelligent life exists elsewhere. Compute a 99% confidence interval for the population proportion.
Example Is There Intelligent Life on Other Planets? In a 2008 Scripps Howard News/ Ohio University survey of 1003 randomly selected Americans, 56% of the sample said that it is either very or somewhat likely that there is intelligent life on other planets.
(Source: www.scrippsnews.com/node/34758).
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
find the value of the linear correlation coefficient r. x 22.6 36.6 15.6 35.0 47.5 y 7 6 6 2 6 a 0 b -0.478 c
Entertainment Software Association would like to test if the average age of "gamers" (those that routinely play video games) is more than 30 years old.
Based upon the two groups - high and low - complete a one-sample t-test to see if there is a significant difference between the two groups based on the second variable that you choose
1.determine whether each of the following is an experiment or an observational study. also identify the explanatory and
Consider a large population of families with three children each. If the genders of children in any family are independent of one another, the number of male children in any family will have a binomial distribution based on three trials.
A pizza store chain wants to see which pizza toppings customers seem t olike the best. A random sample of people were asked about their pizza preferences.
the random walk theory of prices of securities states that price movements in disjoint time periods are independent of
An analyst for the firm is interested in assessing the probability that a person who inquires about the firm will eventually purchase stock (event S) or bonds (event B). Define the union and the intersection of these two events.
The average thickness of books on a library shelf is 8.3 centimeters.the standard deviation is 0.6 centimeter. If 20% of the books are oversied, find the minimum thickness of the oversized books on the library shelf.
What is the value of the test statistic (Z score)? When obtaining data by _______ it's most important to inquire about the purposes of the original experimenter.
What is the point estimate of the population mean? Using the 95 percent level of confidence, determine the confidence interval for μ.
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