Statistics Practice

SE refers to the...

• mean

• standard deviation

• standard error of the mean

• chi square

The symbol  $\Sigma$  means

• sample mean

• square root of all values

• sum of all values

• sample size

The symbol  $\Sigma$  means

• sample mean

• square root of all values

• sum of all values

• sample size

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

What is the standard error of the optimum soil temperature for germination rate?

• 1.78

• 0.91

• 2.89

• 5.34

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A farmer is told the average banana tree takes 12 months from the time the rhizome is planted until it yields fruit. His fields take 11, 14, 16, and 14 months. Is the null hypothesis of 12 months accepted?

• accepted at 2.08

• accepted at 1.44

• accepted at 8.33

• rejected at 8.33

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.

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

NGSS.HS-LS2-6

Which of the following would lower a Chi Square value?

• Increase the sample size

• Decrease the sample size

• Increase the number of sample groups

• A smaller difference between observed and expected values