Stats: Review Chapter 1 - What is Statistics?

Here is some information about the first 10 U.S. presidents. Identify the individuals in this data set.

• Name

• Political Party

• Age at Inauguration

• Age at Death

• State of Birth

Here is some information about the first 10 U.S. presidents. Classify each variable as categorical or quantitative.

Political Party

• Categorical

• Quantitative

Here is some information about the first 10 U.S. presidents. Classify each variable as categorical or quantitative.

Age at Inauguration

• Categorical

• Quantitative

Here is some information about the first 10 U.S. presidents. Classify each variable as categorical or quantitative.

Age at Death

• Categorical

• Quantitative

Here is some information about the first 10 U.S. presidents. Classify each variable as categorical or quantitative.

State of Birth

• Categorical

• Quantitative

Australian high school students were asked to choose their favorite type of music from a list. The bar chart compares the preferences for samples of 250 students in consecutive years. Compare the distribution of music preferences for the two years.

• Hip Hop really increased in popularity from year 1 to year 2.

• Alternative might have stolen some of the favorite votes from Rock since they're similar and Rock dropped in percent.

• Hip Hop is the most popular music.

• Jazz lots all of its votes.

• No one likes Jazz.

Australian high school students were asked to choose their favorite type of music from a list. The bar chart compares the preferences for samples of 250 students in consecutive years. Approximately how many students selected Rock as their favorite type of music during year 2?

• 10

• 15

• 25

• 50

A survey of 800 people who “binge-watch” were asked how many episodes is too many to watch in one viewing session. The results are displayed in the bar chart.

How is the bar chart misleading?

• They should have used a pie chart instead of a bar graph.

• It does not show the different categories of binge-watching.

• The y-axis scale is not the same between each notch.

• They did not label the axes.

• It does not provide the total number of people surveyed.

A study of 68,946 French volunteers found that the respondents who ate the most organic food had a smaller risk of developing cancer than the other respondents. Furthermore, the difference was determined to be statistically significant. Is it reasonable to say that eating more organic food will decrease the risk of developing cancer, based on the study of French volunteers?

• Yes, because the study found a statistically significant difference

• No, because there could be confounding variables

• Yes, because the sample size was large

• No, because cause and effect requires the study to be an experiment

Classify each sample as random, systematic, stratified, or cluster.

In a large school district, all teachers from two buildings are interviewed  to determine whether they believe the students have less homework to do now than in previous years.

• Random

• Systematic

• Stratified

• Cluster