AP Biology Topic 01

What is the median of the following data set?

25, 42, 36, 12, 19

• 36

• 25

• 39

• 26.5

What is the mode of the following data set?

2, 4, 6, 8, 7, 9

• 2, 4, 6, 7, 8, 9

• 4

• 6

• no mode

What is the mean of the following set of data?

2, 6, 10, 31, 14, 8

• 11.8

• 71

• 12

• 14.2

The mean and standard deviation of a population are 200 and 20, respectively. Sample size is 25. 
What is the standard error of the sampling distribution?

• 200
• 16
• 25
• 4

Is there a significant statistical difference between these samples?

• Yes, because the errors bars overlap

• No, because the error bars overlap

• Yes, because the error bars don't overlap

• No, because the error bars don't overlap

"No Overlap" means...

• That there is a statistically significant difference between the two groups

• That there is No statistically significant difference between the two groups

You believe that when someone drinks an energy drink, their heart rate increases. You set up an experiment with various energy drinks and amounts of consumption, and then measure the heart rate of individuals. The types of energy drinks in the experiment is the __.

• IV

• DV

• Control

• Constant

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

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

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1
• 2
• 3
• 4