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What is a point estimate in statistics?
What is a point estimate in statistics?
- An estimate calculated using confidence intervals
- An exact value of the population parameter
- An estimate of a population parameter based on sample data (correct)
- The average of all values in a sample
What is the purpose of inferential statistics?
What is the purpose of inferential statistics?
- To obtain an exact value of the population parameter
- To calculate confidence intervals
- To make generalizations about an unknown population based on sample data (correct)
- To average together several values in the classified section of the newspaper
What do confidence intervals represent in statistics?
What do confidence intervals represent in statistics?
- The exact value of the population parameter
- A range of values within which the population parameter is likely to lie (correct)
- The point estimate of the population parameter
- The average of the sample data
Why are point estimates most likely not the exact value of the population parameter?
Why are point estimates most likely not the exact value of the population parameter?
What is the main concept behind constructing confidence intervals?
What is the main concept behind constructing confidence intervals?
What distinguishes inferential statistics from descriptive statistics?
What distinguishes inferential statistics from descriptive statistics?
What is the point estimate for the population mean?
What is the point estimate for the population mean?
What is the point estimate for the population standard deviation?
What is the point estimate for the population standard deviation?
What is used to estimate the population mean?
What is used to estimate the population mean?
Which theorem states that in approximately 95% of the samples, the sample mean will be within two standard deviations of the population mean?
Which theorem states that in approximately 95% of the samples, the sample mean will be within two standard deviations of the population mean?
What does the empirical rule apply to?
What does the empirical rule apply to?
Which value is used to calculate the standard deviation for the sample mean?
Which value is used to calculate the standard deviation for the sample mean?
What does a 95% confidence interval imply?
What does a 95% confidence interval imply?
What is between 𝑥̅− 0 and 𝑥̅+0.2 in 95% of all the samples?
What is between 𝑥̅− 0 and 𝑥̅+0.2 in 95% of all the samples?
What happens for only 5% of all the samples?
What happens for only 5% of all the samples?
$𝜎 √𝑛$ is equal to what for this example?
$𝜎 √𝑛$ is equal to what for this example?
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