Exam 7: Sampling and Sampling Distributions

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The following data was collected from a simple random sample of a population. 13 15 14 16 12 If the population consisted of 10 elements, how many different random samples of size 6 could be drawn from the population?

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Four hundred people were asked whether gun laws should be more stringent.Three hundred said "yes," and 100 said "no".The point estimate of the proportion in the population who will respond "no" is

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A random sample of 150 people was taken from a very large population.Ninety of the people in the sample were female.The standard error of the proportion is

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Random samples of size 525 are taken from an infinite population whose population proportion is 0.3.The standard deviation of the sample proportions (i.e., the standard error of the proportion) is

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A sample of 400 observations will be taken from an infinite population.The population proportion equals 0.8.The probability that the sample proportion will be greater than 0.83 is

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The extent of the sampling error might be affected by all of the following factors except​

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A simple random sample of 64 observations was taken from a large population.The sample mean and the standard deviation were determined to be 320 and 120 respectively.The standard error of the mean is

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In a local university, 40% of the students live in the dormitories.A random sample of 80 students is selected for a particular study.The probability that the sample proportion (the proportion living in the dormitories) is at least 0.30 is

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A simple random sample of 100 observations was taken from a large population.The sample mean and the standard deviation were determined to be 80 and 12 respectively.The standard error of the mean is

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A random sample of 121 bottles of cologne showed an average content of 4 ounces.It is known that the standard deviation of the contents (i.e., of the population) is 0.22 ounces.In this problem the 0.22 is

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All of the following are true about the standard error of the mean except​

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As a rule of thumb, the sampling distribution of the sample proportions can be approximated by a normal probability distribution whenever

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The following data was collected from a simple random sample of a population. 13 15 14 16 12 The point estimate of the population standard deviation is

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The fact that the sampling distribution of sample means can be approximated by a normal probability distribution whenever the sample size is large is based on the

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The sample statistic s is the point estimator of

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The standard deviation of xˉ \bar x is referred to as the?

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From a group of 12 students, we want to select a random sample of 4 students to serve on a university committee.How many combination of random samples of 4 students can be selected?

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A sample of 92 observations is taken from an infinite population.The sampling distribution of xˉ\bar { x } is approximately

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There are 6 children in a family.The number of children defines a population.The number of simple random samples of size 2 (without replacement) which are possible equals

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If we consider the simple random sampling process as an experiment, the sample mean is

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