A First Course in Statistics, 12th Edition

Chapter Notes

Key Terms

Note: Asterisks (*) denote terms from the optional section in this chapter.

• *Chi-square $({\chi }^2)$ distribution 351

• Confidence coefficient 319

• Confidence interval 316

• Confidence level 316

• Degrees of freedom (df) 327

• Interval estimator 316

• Point estimator 316

• Sampling error 345

• Target parameter 316

• t-statistic 327

• Wilson’s adjustment for estimating p 340

• z-statistic 317

Key Symbols

$\theta$	General population parameter (theta)
$\mu$	Population mean
${\sigma }^2$	Population variance
$\sigma$	Population standard deviation
p	Population proportion; P (Success) in binomial trial
q	$1-p$
$\overline{x}$	Sample mean (estimator of $\mu$)
$s^2$	Sample variance (estimator of ${\sigma }^2$)
$\widehat{p}$	Sample proportion (estimator of p)
${\mu }_{\overline{x}}$	Mean of the population ...