Stats Post Mid-Topic Review

Choose all measures of center.

• Mean

• IQR

• Mode

• Median

• MAD

Ryan gathered information from Mrs. Walsh’s math class about how much time spent on math homework by students in his school. Is this a representative sample?

• Yes, this is a representative sample of students in his school

• No, there are only a few students are in his class.

• No, this only takes Mrs. Walsh’s math class into consideration.

• Yes, this is a representative sample of students in math classes.

The dot plots show the number of calls two different radio shows get over the course of 10 days. Use the mean value of each data set to make an inference about the number of calls made.

• On average more people called Radio Show 1 than Radio Show 2.

• On average more people called Radio Show 2 than Radio Show 1.

• The same number of people called both shows.

• Radio Show 1 has less variation.

What is an accurate conclusion about students in the swim class?

• Most in the swim class students are younger than 10

• The data is symmetrical

• Most students in the swim class are between the ages of 11 and 14

• The average age of students in the class is 8 years old.

Based on the data, if there are 360 students total, how many would you expect to play exactly one sport?

The box-and-whisker plot shows  the ages of the members of the 2008 U.S. women’s wheelchair basketball team.

• 50% of players are 25 years old or older.

• The range is 30.

• The median age of players on the team is 25.

• The middle fifty percent has a range of 6.

• The data is skewed right.

The box plots below show the daily high temperature ( in degrees Celsius) that were recorded during July 2013 in each city. Based on the box plots which is a correct conclusion that can be drawn?

• The daily high temperatures in July varied more noticeably in Washington D.C.

• The daily high temperatures in July were hotter on average in Washington DC.

• Washington D.C. had the coldest temperature recorded in July.

• None of the above

Collier and Hendry are neighboring counties in Florida. However, their age distributions are quite different. The box-and-whisker plots show the age distributions of the two counties. Choose all correct conclusions.

• Collier County has a higher median age.

• • Hendry County’s data is symmetrical. 

• 75% of Hendry County’s population is 43 years old or less.

• • In general, Hendry County has younger residents than Collier County. 

Quincy gathers the heights of a random sample of sixth graders and seventh graders and displays the data in box plots. Select all true statements.

• 6th grade has more variability than 7th grade.

• 6th grade has a lower minimum height than 7th grade.

• 7th grade has a higher median that 6th grade.

• All 6th graders are taller than 7th graders.

• The range of height for 6th and 7th grade is the same.