Basic Statistics

What is population mean?

• (mu)

• x

• x/n

• n

What is square root of variance?

• mean

• median

• standard deviation

• mode

Hypotheses Testing uses two hypothesis. ____ and _____ hypothesis.

(a)  

Which of the following is a bell-shaped distribution curve?

• Exponential

• Poisson

• Normal

• Binomial

• Type 1 error

• Level of significance

• Confidence Interval

• Type 2 error

The value that a point estimator takes is called (a)  

Which of the following is the arithmetic average of a set of data points?

• mean

• median

• mode

• midpoint of the magnitudes

For a study into rural crime, a researcher has a good amount of descriptive data. One variable is a basic demographic data point indicating a subject’s racial/ethnic origin. This variable is composed of classifications indicating Hispanic, Caucasian, Pacific Islander, and African-American. What type of data is this variable?

• ratio

• categorical

• continuous

• binomial

The ______ is the score that rests squarely in the middle of a distribution, with 50% falling above and 50% falling below.

• mode

• median

• mean

• variation

The level of measurement that is numeric, rank-orderable, and has equal intervals between adjacent points, but that does not have a true zero is ______.

• nominal

• ratio

• interval

• ordinal