Hypothesis Tests
... observed mean of the variable is compared to this value. The data set analyzed in the following example, Bthdth92, is taken from the 1995 Statistical Abstract of the United States, and it contains measures of the birth rate and infant mortality rate for 1992 in the United States. Information is prov ...
... observed mean of the variable is compared to this value. The data set analyzed in the following example, Bthdth92, is taken from the 1995 Statistical Abstract of the United States, and it contains measures of the birth rate and infant mortality rate for 1992 in the United States. Information is prov ...
7.1.1 Parameters and Statistics What is the average income of
... How can x-‐bar, based on a sample of only a few of the 117 million American households, be an accurate estimate of μ? After all, a second random sample taken at the same time would choose di ...
... How can x-‐bar, based on a sample of only a few of the 117 million American households, be an accurate estimate of μ? After all, a second random sample taken at the same time would choose di ...
Chapter 7
... • A statistical test for a population mean. • The t-test can be used when the population is normal or nearly normal, is unknown, and n < 30. • The test statistic is the sample mean x • The standardized test statistic is t. ...
... • A statistical test for a population mean. • The t-test can be used when the population is normal or nearly normal, is unknown, and n < 30. • The test statistic is the sample mean x • The standardized test statistic is t. ...
estimationtheory
... when s is unknown. Estimate a population proportion using the z statistic. Use the chi-square distribution to estimate the population variance given the sample variance. Determine the sample size needed in order to estimate the population mean and population ...
... when s is unknown. Estimate a population proportion using the z statistic. Use the chi-square distribution to estimate the population variance given the sample variance. Determine the sample size needed in order to estimate the population mean and population ...
Box and Whisker Plot
... The Chi Square test (X2) is often used in science to test if data you observe from an experiment is the same as the data you would expect from the experiment. Calculating X2 values allow you to determine if test results can be attributed to randomness or not. If the data differs greatly and is not d ...
... The Chi Square test (X2) is often used in science to test if data you observe from an experiment is the same as the data you would expect from the experiment. Calculating X2 values allow you to determine if test results can be attributed to randomness or not. If the data differs greatly and is not d ...
Document
... Example: Testing μ with a Small Sample A used car dealer says that the mean price of a 2005 Honda Pilot LX is at least $23,900. You suspect this claim is incorrect and find that a random sample of 14 similar vehicles has a mean price of $23,000 and a standard deviation of $1113. Is there enough evi ...
... Example: Testing μ with a Small Sample A used car dealer says that the mean price of a 2005 Honda Pilot LX is at least $23,900. You suspect this claim is incorrect and find that a random sample of 14 similar vehicles has a mean price of $23,000 and a standard deviation of $1113. Is there enough evi ...
Bootstrapping
... to test some hypothesis about the parameters. The bootstrap obtains the EDF from data by treating the sample as if it were the population and resampling in order to simulate the distribution of the statistic of interest. The DGP as a whole is not varied, only the stochastic component is simulated: a ...
... to test some hypothesis about the parameters. The bootstrap obtains the EDF from data by treating the sample as if it were the population and resampling in order to simulate the distribution of the statistic of interest. The DGP as a whole is not varied, only the stochastic component is simulated: a ...
Practice Final
... Fail to reject null hypothesis; insufficient evidence to show the pesticide reduces lifespan (10) Using the data from the previous problem, we wish to test whether the pesticide increases the standard deviation of beetle lifespan. For this question, assume the standard deviation of beetle lifespan w ...
... Fail to reject null hypothesis; insufficient evidence to show the pesticide reduces lifespan (10) Using the data from the previous problem, we wish to test whether the pesticide increases the standard deviation of beetle lifespan. For this question, assume the standard deviation of beetle lifespan w ...
Lecture 9 - Statistics
... Last day, introduced a point estimator…a statistic that estimates a population parameter Often more desirable to present a plausible range for the parameter, based on the data We will call this a confidence interval ...
... Last day, introduced a point estimator…a statistic that estimates a population parameter Often more desirable to present a plausible range for the parameter, based on the data We will call this a confidence interval ...