1-2/1-3 Review

What is the IQR of the following data set:

4, 5, 6, 8, 9, 10, 11

• 5

• 6

• 7

• There is not enough information

What is the the third quartile?

• 20

• 35

• 15

• 70

Should we use the median and IQR or mean and standard deviation?

• Median and IQR because it is skewed left

• Median and IQR because it is symmetric

• Mean and Standard deviation because it is symmetric

• Mean and Standard deviation because it is skewed

Without computing, how will the mean relate to the median?

• Mean > Median

• Mean will be approximately equal to the Median

• Mean < Median

• Mean will be exactly equal to the median

What is the upper bound for outliers?

The five number summary is given as follows:

Min = 0; Q1 = 1; Median = 1.5; Q3 = 4, Max = 9

• 4.5

• 7

• 8.5

• 6

The distribution of test scores is skewed right. Which of the following is likely to be true?

• mean = median
• mean > median
• mean < median
• mean = 2 x median

Where would the median be in an ordered set of 51 numbers?

• 25th number
• between the 25th and 26th numbers
• 26th number
• between 26th and 27th numbers

What is likely the shape of a distribution where mean = 18 and median = 26?

• symmetric
• uniform
• skewed right
• skewed left

Which best describes this distribution?

• Skewed to the right with wait times between 0 and 99 minutes.
• Symmetric with an outlier between 90 and 99 minutes.
• Bimodal and Symmetric
• Skewed to the left.

15 people took a CPR test. What was the median score?

• 5-10
• 10-15
• 15-20
• 20-25