Research and Assessment

Question 1

Chi-squared test

Answer 1

Statistic used to suggest whether there might be a relationship between two nominal or categorical variables

Question 2

Confidence Interval

Answer 2

A range of values around a sample statistic; the population parameter is expected to be within that interval

Question 3

Measure of central tendency (statistics Q)

Answer 3

Median is better measure of central tendency because it is less influence by outliers than the mean

Question 4

Standard deviation

Answer 4

The square root of the variance; Use to describe the degree to which a distribution is spread out (how far from the mean data points tend to be); About 68 percent of measurements in a normal distribution are within 1 std deviation of the mean; about 95% a

Question 5

Symptomatic method (statistics Q)

Answer 5

Uses readily available data, such as building permits, school enrollment, or voter registration, to estimate the current population

Question 6

T-value

Answer 6

The tolerable soil loss that, if exceeded, would adversely affect the productivity of the soil

Question 7

Variance (statistics Q)

Answer 7

A measure of how spread out a distribution is

Question 8

Mode

Answer 8

Value with the highest frequency

Question 9

Pareto Chart

Answer 9

Bar graph with line representing cumulative totals