Statistics: Informed Decisions Using Data (5th Edition)

Chapter 8

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Sampling distribution ; The sampling distribution ... more

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; If is sufficiently large or the population is ... more

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Standard error ; The standard deviation of the ... more

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If a sample is drawn from a normal population, ... more

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For a non-normal population, the sampling ... more

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The sample size should be 4 times the actual ... more

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Normally distributed with a mean of 30 and a ... more

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NoThe sample size is more than 30.The given data ... more

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802 ; For a sample size () more than 30, the ... more

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643 ; For a sample size () more than 30, the ... more

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52 ; For a sample size () more than 30, the ... more

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27 ; As the sample size increases, the ... more

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The probability distribution of values of a ... more

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The Central Limit Theorem states that, as the ... more

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A population consisting of an uncountable number ... more

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(b)As the sample size increases, the standard ... more

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The distribution shown in (a) is symmetric but not... more

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; The proportion of people having pet D in the ... more

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Sample proportion ; Sample proportion, which is ... more

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It is not necessary as a sample is rarely an exact... more

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The average of sample proportions () obtained from... more

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, and ; Following are the required conditions:The ... more

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It decreasesThe standard deviation reduces to half... more

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; Let be the population size.Check the following... more

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; Let be the population size.Check the following... more

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; Let be the population size.Check the following... more

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; Let be the population size.Check the following... more

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The value of the probability provides insufficient... more

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The probability provides insufficient evidence to ... more

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The result is not unusual.There is a danger that ... more

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Yes,the policy is sound because the probability ... more

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Samples are not independent of each other. ; A ... more

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The probability distribution of a statistic ... more

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If the population is normally distributed, orIf ... more

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If , and. ; For an infinite population, if the ... more

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and and ; A sample mean () has a mean () equal to... more

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The result is not unusual. ; Verify the conditions... more

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It states that the sampling distribution of the ... more

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Mean: 50Standard deviation: 4. ; According to the ... more

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The probability of the result is not unusual, ... more

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; The following data is taken from the website. ... more

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Time spent on educational activities?What is your ... more

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Sample mean of all variables will follow a normal ... more

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Results are unusual only for sports ; Compute the ... more

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There was a survey conducted to study the average ... more

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Obtain 250 simple random samples from a normally-... more

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; Compute the mean of first 10 observations from ... more

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; Compute the median of first 10 observations ... more

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Sample numbern20mnn20medn40mnn40medn80mnn80med150.... more

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VariableNMeanSE MeanSDMinQ1n10mn25050.2740.2183.... more

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The sample means are approximately equal to the ... more

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The standard deviation of the sample mean is less ... more

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Sample meanThe deviation in the sample mean is ... more

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For both, mean and median, as the sample size ... more

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Obtain 250 simple random samples using an online ... more

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Sample numbere20mn143.06215278.92039335.5201460.... more

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; Compute the median of first 10 observations ... more

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; Use CAS to compute the mean of the first 20 ... more

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VariableNMeanSE ... more

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For a small sample size, the value of the sample ... more

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The standard deviation of the sample median is ... more

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Sample medianThe deviation in the sample mean is ... more

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For both, mean and median, as the sample size ... more

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Yes, the central limit theorem can be used for the... more

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