Fall24 Final Exam Review

What is another word for a percentage?

• Sample

• Population

• Relative Frequency

• Categorical Value

Rangers in Yellowstone Park want to know what percent of moths living in the area have been exposed to pesticides.  They collect 2043 moths from the wild and test them for poisonous chemicals.

The sample for this study is:

• All moths living near Yellowstone Park

• The 2043 moths collected for the study

• The poisonous chemicals found in the moths

• The park rangers

Rangers in Yellowstone Park want to know what percent of moths living in the area have been exposed to pesticides.  They collect 2043 moths from the wild and test them for poisonous chemicals.

The population for this study is:

• All moths living near Yellowstone Park

• The 2043 moths collected for the study

• The poisonous chemicals found in the moths

• The park rangers

Rangers in Yellowstone Park want to know what percent of moths living in the area have been exposed to pesticides.  They collect 2043 moths from the wild and test them for poisonous chemicals.

This is an example of...

• Descriptive Statistics because it uses a sample to make predictions about a population

• Descriptive Statistics because information about all objects of the study is known

• Inferential Statistics because it uses a sample to make predictions about a population

• Inferential Statistics because information about all objects of the study is known

Which of the following is a quantitative variable?

• Favorite color

• Brand of stereo

• Weight of baby

• Species of tree

Which of these is a categorical variable that could be used to study American Birds?

• color of the birds’ feathers

• average number of offspring per species

• length of the birds’ wings

• number of birds living in Texas

The following data was gathered from a survey of Male and Female students at Kennedy High School.  Students were asked what type of car they drive.

According to this chart, what percent of students surveyed were female? (Round to nearest %)

• 86%

• 54%

• 50%

• 46%

According to the pie charts above, which is the most common species of frog in Southeast Texas?

• Canyon Tree Frog

• Spotted Tree Frog

• Squirrel Tree Frog

• Other

For people that preferred vegetarian burritos, what is the least common drink choice?

• Cola

• Diet Cola

• Water

• No drink

Which of these conclusions is supported by the bar chart?

• Water is the most common drink choice among people who prefer steak burritos

• Diet cola is the most popular drink choice among people who prefer chicken burritos

• More people choose vegetarian burritos than chicken burritos

• People that choose vegetarians burritos choose to drink water more than any other drink