1.8 Quickcheck

Here is the distribution of a quantitative variable and its summary statistics.

What is the upper fence for outliers based on the rule we used in class?

• Outliers must be > 11.5

• Outliers must be > or equal to 11.5

• Outliers must be > 10

• Outliers must be > or equal to 10

Here is the distribution of a quantitative variable and its summary statistics.

What is the lower fence for outliers based on the rule we used in class?

• Outliers must be < -0.5

• Outliers must be < or equal to -0.5

• Outliers must be < 1

• Outliers must be < or equal to 1

What is the shape of this distribution? Is the mean or the median greater for this shape?

• Skewed Left

  Mean > Median

• Skewed Right

  Mean > Median

• Skewed Left

  Mean < Median

• Skewed Right

  Mean < Median

What percent of all weeks had more than 7 new inmates arrive in the prison?

• 25% of weeks

• 50% of weeks

• 75% of weeks

• 100% of weeks

This distribution shows the number of trees planted in Athens yearly over 20 years.

How many years had less than 237.5 trees planted?

• 5 years

• 15 years

• 10 years

• 7 years

This distribution shows the number of trees planted in Athens yearly over 20 years.

How many years had more than 312.5 trees planted?

• 5 years

• 15 years

• 10 years

• 7 years

This distribution shows the number of trees planted in Athens yearly over 20 years.

How many years had between 180 and 385 trees planted?

• 5 years

• 15 years

• 10 years

• 7 years

The summary statistics for a particular variable are shown. Does this distribution have an outlier?

• Yes, there is a low outlier.

• Yes, there is a high outlier.

• There is no outlier.

These box plots show the distribution of ages of children visiting the NSS Education Center in 2010 and in 2020.

Which distribution has a greater median, and what is that median?

• 2010 has a greater median. Its median is 6.

• 2010 has a greater median. Its median is 12.

• 2020 has a greater median. Its median is 12.

• 2020 has a greater median. Its median is 16.

These box plots show the distribution of ages of children visiting the NSS Education Center in 2010 and in 2020.

Which distribution has a greater variability, as shown by the IQR?

• The 2010 distribution is more variable. Its IQR is 8.

• The 2020 distribution is more variable. Its IQR is 12.

• The 2020 distribution is more variable. Its IQR is 8.

• Both distributions have the same IQR.