The t distribution is used to construct a confidence interval for the population mean 
when the population is unknown and the sample size is small.
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Q90: The t distribution approaches the standard normal
Q91: If a sample has 15 observations and
Q92: If a sample has 15 observations and
Q93: A 90% confidence interval estimate for the
Q94: If a sample has 18 observations and
Q96: In constructing a 90% interval estimate for
Q97: The Student's t distribution is a sampling
Q98: In order to determine the p-value associated
Q99: A random sample of size 10 produced
Q194: The "shape" of the t-distribution changes as
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