Statistics

Question 1

Variation

Answer 1

“raw material” breeder has available for herd improvement

Measure for distribution

Question 2

Discontinuous Variation

Answer 2

Qualitative traits
Few, discrete genes
Phenotype not greatly influenced by environment

Question 3

Continuous Variation

Answer 3

Quantitative traits
Many genes
Economically important traits
Highly complex

Question 4

Sample population

Answer 4

Random selection from population that represents the whole population with few variables

Question 4

Population parameter

Answer 4

Numerical descriptive measure for a population

Question 5

Sample statistic

Answer 5

Numerical descriptive measures for a sample
Estimate of population parameter

Question 6

Central Tenancy

Answer 6

In normal distribution, values are clustered at the midpoint, thinning out symmetrically towards both extremes

Question 7

Median

Answer 7

Value half way between the 2 extremes values

Question 8

Mode

Answer 8

Class with highest frequency

Question 9

Mean

Answer 9

Average of all measurements in the population (or sample)
Most useful statistic for estimating central tenancy of most populations

Question 10

Standard Deviation

Answer 10

In absolute value, of an observation drawn at random from the population

Question 11

Standard Error

Answer 11

Helps us picture how much variation actually exists for a trait