Question

1. A ________ is a sample statistic such as the mean or a proportion that serves as an estimate of the same value in the population.

population parameter

confidence level

point estimate

confidence interval

standard error of the mean

2. we can differentiate among variables in terms of their levels of measurement, or the mathematical nature of the values of a variable. For example, the values of a variable measured at the __________ level have an inherent rank order with equal and constant distance between adjacent values.

qualitative

interval-ratio

nominal

ordinal

all of the above

3. _____________ are summary statistics that capture the “typical,” “average,” or “most likely” score or value in a variable distribution.

Means

Measures of dispersion

Measures of central tendency

Measures of association

Measures of probability

4. According to course readings and lectures, which of the following is NOT a true statement about the standard deviation? The standard deviation ___________.

is the most widely used measure of dispersion

is the square root of the squared deviations about the mean

describes the average or typical deviation of the scores

is appropriate for variables at all levels of measurement

increases in value as the distribution of scores becomes more diverse

Answer 1

1. Point estimate

2. interval-ratio [Data is at the ratio level of measurement if it can include 0 within the intervals and can be arranged in an order]

3. Measures of central tendency [ like mean, median, mode, etc.]

4. is apropriate for variables at all level of measurement