BIOL 214 Quiz 2

Match the following

• σ

• Population Mean

• y

• Sample Standard Deviation

• ȳ

• Population Proportion

• p̂

• Population Standard Deviation

• s

• Sample Mean

You want to sample Fairfax County residents about their coffee preferences and decide that you want to divide the sample into subgroups of age (like 18-29, 30-39, 40-49, etc). What kind of sampling technique did you use?

• Systematic Random Sampling

• Random Cluster Sampling

• Stratified Random Sampling

• Simple Random Sampling

How should you display the frequency of categorical data?

• Bar Chart

• Histogram

• Stem and Leaf Plot

• Dot Plot

What is the median number of gallons of paint ordered? (n=14)

• 5

• 4

• 2

• 1

Your research group wants to investigate public opinion on electric vehicles. You decide to go to each polling place in Fairfax County and ask voters their opinion as they are leaving. What kind of sampling technique did you use?

• Systematic Random Sampling

• Random Cluster Sampling

• Stratified Random Sampling

• Simple Random Sampling

Min = 3.00 1st Qu. = 27.00 Median = 49.00

Mean = 49.70 3rd Qu. = 74.75 Max = 94.00

Calculate the upper fence.

• 71.625

• 120.625

• 141.75

• 165.625

What is the best way to graph the frequency of continuous data?

• Boxplot

• Bar Chart

• Dot Plot

• Histogram