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In a survey of 1002 people, 710 said that they voted in a recent presidential election. Voting records show that 61% of eligible voters actually did vote. Given that 61% of eligible voters actually did vote, find the probability that among 1002 randomly selected eligible voters, at least 701 actually did vote.
h-p is said to be the leading seller of pc's in the U.S WITH 27% share of the pc market. if a researcher selects 130 recent pc purchases
For such groups of 800, would it be unusual to get 687 consumers who recognize the Dull Computer Company name?
Precisely (i.e., using specific numbers) what does central limit theorem tell us about sampling distribution of sample means for samples of this size from this population?
A clothing manufacturer tests an SRS of 3 specimens of each fabric. (a) What is the probability that the mean breaking strength of the 3 untreated specimens exceeds 49 pounds.
A simple random sample of 50 items from a population with σ 6 resulted in a sample mean of 32.
The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean?
A spokesman for a popular television game show claims that contestants on the show win an average of $1200. In a random sample, 35 contestants were questioned on the amount of money they had won in order to test the hypothesis.
Converting data to indexes makes it easier to compare the trend in a series composed of exceptionally large numbers.
Suppose that you perform a significance test regarding a population mean, and that the evidence does not warrant rejection of the null hypothesis.
The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
The amounts were normally distributed with a standard deviation of 10 and 12 for men and women, what is the probability that man will spend at most an hour?
How large a sample should we take if we wish the 95% margin of error to be plus or minus $15.00. Assume from previous studies that the standard deviation is $120.
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