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Internet music, again. A Gallup Poll (Exercise 29) asked Americans if the fact that they can make copies of songs on the Internet for free made them more likely-or less likely-to buy a performer's CD. Only 13% responded that it made them "less likely." The poll was based on a random sample of 703 Internet users.
a) Check that the assumptions and conditions are met for inference on proportions.
b) Find the 95% confidence interval for the true proportion of all U.S. Internet users who are "less likely" to buy CDs.
The ages of the automobiles are equally distributed among the three categories? what would the results suggest to a tire manufacturer?
data from previous years reveal that the distribution of the final exam scores in an introductory statistics class is
no children which is equal to value obtained by census. Give z statistic (rounded to two decimal places) and P-value. What do you conclude? (Use = 0.10.).
Calculate the sample mean, sample variance, and sample standard deviation for the following data set
Using a significance level of .01 to test this hypothesis, what is your decision rule?
Difference Between Samples with Same or Equal Mean
use the given information to find the p value. also use a 0.05 significance level and state the conclusion about the
Using the population standard deviation of 1.4 ounces, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
question a police department reports that the probabilities that 0123 and 4 car thefts will be reported in a given day
Construct a scatter diagram using the household saving rates in the United States and Germany as the two variables. It doesn't really matter which one you con- sider to be the independent variable. In the years when U.S. saving rates were hig..
according to u.s. news amp world report data in 1995 tuition costs at indiana university a public university were 2984
Assuming the term project is there. Given that he searches on disc 1 but cannot find your thesis, what is the probability that your thesis is on disc i for i = 1,2,3,4.
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