# Bus Stat

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question
P- bar =
sample size
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As the sample size increases the standard error
decreases
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Sample statistic is the point estimator of
population paramiter
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What are the samples for three parameters
MOO
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a sample statistic such as sample mean is known as a
statistic
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A single numerical value used as an estiamte of a population parameter is known as a
point estimate
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As the number of degrees of freem for a t chart increases, the diference between the t distribution and the standard normal distribution ______
decreases
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At 95% confidence interval for a population mean is determined to be 100 to 120 , if the confidence coefficient is reduced to .9 U becomes
narrower
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The ability of an interval estimate to contain the value of the population parameter is described by the
confidence
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IF we change 95% C to 99% C we can expect the size of the confidence to
decrease
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An interval estimate is a range of values used to estimate the
population parameter
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When using T distribution (when sample size is small) we must assume what
Normal distribution
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The probablitlity of a type 1 error is denoted by