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1) Suppose you compute a confidence interval with a sample size of 100. What will happen to the confidence interval if the sample size decreases to 80?
2) In 2013, Gallup conducted a poll and found a 95% confidence interval of the proportion of Americans who believe it is the government's responsibility for health care. Give the statistical interpretation.
Based on this sample at least 75% of all subcompact model values for highway fuel economy (mpg) would fall within
1. state two ways in which the standard normal distribution and the students t-distribution are alike.2. state two ways
The following is a random sample of the wealth, in billions of U.S. dollars, of individuals listed on the Forbes "Billionaires" list for 2007.- Construct a 90% confidence interval for the average wealth in $ billions for the people on the Forbes li..
Consider the accompanying 2 x 3 table displaying the sample proportions that fell in the various combinations of categories (e.g., 13% of those in the sample were in the first category of both factors
Suppose that you wished to conduct a similar survey for the geographic region you live in. Describe the population for your survey.
The Boston Transit Authority wants to determine whether there is any need for changes in the frequency of service over certain bus routes.
suppose that with probability p the random variable x has the distribution n01 and with probability 1-p x has the
A group of students collected data at the Cedar Point amusement park and reported that the "wait time" to ride the "Top Thrill Dragster" roller coaster is consistently distributed within a range of 40 minutes to 90 minutes.
with 7 a 90 confidence interval for a population mean was 103 to 108.round to 2 decimal places. example 3.87determine
If a student is chosen at random, find the probability of getting someone who is a non-smoker. Round your answer to three decimal places.
You are interested in examining any potential differences in student learning (i.e., post-test minus pre-test) that may be due to the number of days of teacher
1.bags of chips are filled using a machine. because not all chips are the same size it is impossible to get the exact
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