Review in Pre-Finals

A group of students obtained the following scores in their statistics quiz: 7, 4, 8, 9, 3, 6, 7, 4, 5, 8.

What is the median?

• 5

• 5.5

• 6.5

• 7

A group of students obtained the following scores in their statistics quiz: 7, 4, 8, 9, 3, 6, 7, 4, 5, 8.

What is the mean of the data set?

• 5

• 5.5

• 6

• 7

A group of students obtained the following scores in their statistics quiz: 7, 4, 8, 9, 3, 6, 7, 4, 5, 8.

From the data set, Kashieca answered that the mode is 4, 7 and 8. Is she correct? Why?

• Yes, because all three numbers appear most frequently in the dataset.

• No, because the correct modes are only 4 and 7.

• No, because the correct modes are only 7 and 8.

• No, because the correct modes are 4, 7, and 8, but she miscalculated the frequencies.

A group of students obtained the following scores in their statistics quiz: 7, 4, 8, 9, 3, 6, 7, 4, 5, 8.

If the given data set is using quartiles to measure a certain position, in how many parts will the data set be divided?

• 4

• 5

• 10

• 100

What formula should we use to locate the upper quartile?

• 
• 
• 
• 

What is the first step in finding the quartile of ungrouped data?

• Calculate the mean of the dataset

• Arrange the data in ascending order

• Find the mode of the dataset

• Count the number of even and odd numbers

If the given data set is divided by 10, what measure of position was used?

• Quartile

• Decile

• Percentile

• Median

• 1

• 2

• 5

• 10

What other measure of position is 7, if the median score is 7?

• P75

• 3rd Decile

• D5

• 1st Quartile

If the P75 is 8, can we say that Q3 is also 8?

• Yes, because Q3 and P75 both represent the 75th percentile of the data.

• No, because Q3 represents the median of the dataset.

• No, because Q3 and P75 measure different locations in the data.

• Yes, because Q3 always equals the highest value in the dataset.