Data Analysis Review

The sales tax rate in Texas is 8%. If Mr. Jacobs buys an American Girl doll for his daughter with a price tag of $150, what is the total amount he will pay for the doll?

Leo wants to buy some shoes. He found the shoes at three different stores for a price of $35. The stores are each having a sale.

Store X is offering 15% off the price of the shoes.

Store Y is offering $5 off the price of the shoes.

Store Z is offering 1/5 discount off the price of the shoes.

Which statement about the sale price of these shoes is true?

• Store X has the best sale price of $20

• Store Z has the best sale price of $28.

• Store Y has the best sale price of $30.

• Store Z has the best sale price of $7.

How many more hours does she spend at tennis practice than Hawk Time?

• A

• B

• C

• D

A Skateboard is on sale for 25% off.  If the original price was $120, what is the sale price?

• 60
• 90
• 110
• 44

The dot plots show the heights of seventh graders in two classes. Which statement is best supported by these data?

• The distributions of the data of both classes are approximately symmetrical

• The median height of the students in Mr. Carter's class is less than the median height of the students in Mrs. Petunia's class

• Mr. Carter's class has a greater range in player heights than Mrs. Petunia's class has

• The mode height of the students in Mr. Carter's class is less than the mode height of students in Mrs. Petunia's class

Answer explanation

To find the range you need to subtract the highest value and the lowest value for each class

Tags

dot plots

teks 7.6g

range

median

mode

The dot plots show the number of pets students have in two classes. Which statement is best supported by the data?

• The mean of Mrs. Jones' class is higher than the mean of Mr. Carson's class.

• The range of Mr. Carson's class is lower than the range of Mrs. Jones' class.

• The median of Mr. Jones' class is equal to the median of Mr. Carson's class.

• The mode of Mrs. Jones' class is higher than the mode of Mr. Carson's class.

Answer explanation

Remember, the median is the middle data point

Tags

dot plots

teks 7.12a

mean

median

mode

The dot plots show the grades on a test of two different classes. Which statement is best supported by the data?

• The distribution of both sets of data are mostly symmetrical

• The mode of Ms. Henry's class is lower than the mode of Mrs. Clarence's class

• The median of Ms. Henry's class is higher than the median of Mrs. Clarence's class

• Mrs. Clarence's class has a higher range of test scores than Ms. Henry's class

Answer explanation

The mode is the option that has the most dots (data points) associated with it

Tags

dot plots

teks 7.12a

median

mode

range

Here are three statements about the height of students in two classes.

I. The median of the two classes is equal

II. The distribution of heights for Mr. Carter's class appears to be symmetrical

III. The mode of Mrs. Petunia's class is less than the mode of Mr. Carter's class

Which of these 3 statements appear to be true?

• I, II, and III

• I and II

• II and III

• III only

Tags

dot plots

teks 7.12a

mode

median

symmetry

Here are three statements about the grades scored on a test in two different classes.

I. The distribution in both classes is not symmetrical

II. The mean in Ms. Henry's class is less than the mean in Mrs. Clarence's class.

III. The range in Ms. Henry's class is greater than the range in Mrs. Clarence's class

Which of these three statements appear to be true?

• I and II

• II and III

• III only

• I, II, and III

Tags

dot plots

teks 7.12a

mean

range

symmetry

Match the following terms with their definitions

• The lowest value of the data set

• Maximum (Max)

• Middle of the lower half of the data set. 25% of the data lies below this value and 75% lies above.

• First Quartile (Q1)

• Middle of the upper half of the data set. 75% of the data lies below this value and 25% lies below.

• Third Quartile (Q3)

• The highest value of the data set

• Median (Q2)

• Middle of the data set. Half the data (50%) lies below this value and half (50%) lies above.

• Minimum (Min)