Quiz 7

• margin of error is used


  in the interval estimate to produce a confidence interval
• margin of error is a multiple

  of the standard error
• we can use the margin of error to


  gauge how close an estimate is likely to be to the parameter
• margin of error is dependent on

  the variability of the variable, the sample size, and the confidence level
• margin of error is not dependent on

  population size
• t-distribution with df = $\infin$


  standard normal distribution
• t-distribution always has mean

  0
• larger degrees of freedom

  t-distribution is less spread out
• as the degrees of freedom increase


  the t-distribution has shorter/lighter/thinner tails
• the longer/greater/bigger the degrees of freedom


  the closer a t-distribution gets to the standard normal distribution