Bio Statistics

The symbol  Σ  means

• sample mean

• square root of all values

• sum of all values

• sample size

SE refers to the...

• mean

• standard deviation

• standard error of the mean

• chi square

Degrees of freedom is calculated by

• dividing the standard deviation by the square root of the sample size

• subtracting one from the sample size

• adding together all values and dividing by the sample size

• squaring the difference between the observed and expected values

The mean value of a data set is calculated by...

• dividing the standard deviation by the square root of the sample size

• subtracting one from the sample size

• adding together all values and dividing by the sample size

• squaring the difference between the observed and expected values

The middle number in a set of data is called the...

• mean

• standard deviation

• median

• mode

Which of the following statements is true pertaining to the graph given?

• There are more Rainbow Pitta than Cockatoo

• There are 17.5 million Guildian Finch

• Guildian Finch have the least accurate population measurement.

• Cockatoo and Rainbow Pitta have no statistical difference in population.

Larger range will have ___ variability and smaller range will have ___ variability

• Greater, less

• greater, greater

• less, greater

• less, less

Which standard deviation graph would yield more accurate results?

• Taller and thinner

• Shorter and wider

Low standard error equals ___ in confidence

• Decrease

• Increase

Standard error is graphed as ...

• Error bars

• Standard Deviation Bars

• Bar Graph

• Line Graph