
Inferences from sample data
... Alpha is the significance level used to compute the confidence level. The confidence level equals 100*(1 - alpha)%, or in other words, an alpha of 0.05 indicates a 95 percent confidence level. Standard_dev is the population standard deviation for the data range and is assumed to be known. Size is th ...
... Alpha is the significance level used to compute the confidence level. The confidence level equals 100*(1 - alpha)%, or in other words, an alpha of 0.05 indicates a 95 percent confidence level. Standard_dev is the population standard deviation for the data range and is assumed to be known. Size is th ...
Chapter 9
... • A tire company guarantees that a particular tire has a mean useful lifetime of 42,000 miles or more. A consumer testing agency, wishing to verify this claim, observed n=10 tires on a test wheel that simulated normal road conditions. The lifetimes (in thousands of miles) were as follows: 42, 36, 46 ...
... • A tire company guarantees that a particular tire has a mean useful lifetime of 42,000 miles or more. A consumer testing agency, wishing to verify this claim, observed n=10 tires on a test wheel that simulated normal road conditions. The lifetimes (in thousands of miles) were as follows: 42, 36, 46 ...
Normal Approximation to the Binomial Distribution
... The trials are identical to each other, since each trial consists of randomly selecting a person from the population of likely voters and asking the person, “Do you intend to vote for Sen. Barack Obama for President?” ...
... The trials are identical to each other, since each trial consists of randomly selecting a person from the population of likely voters and asking the person, “Do you intend to vote for Sen. Barack Obama for President?” ...
Descriptve.s02
... The median is the middle observation in data that have been arranged in ascending or descending numerical sequence ...
... The median is the middle observation in data that have been arranged in ascending or descending numerical sequence ...
T-tests
... of the normal curve. The t distribution is actually a family of distributions that comes closer and closer to the normal probability distribution as degrees of freedom ...
... of the normal curve. The t distribution is actually a family of distributions that comes closer and closer to the normal probability distribution as degrees of freedom ...