Back to back stem and leaf

The back to back stem and leaf plot below shows the exam grades (out of 100) of two sections. The digit in the stem represents the tens and the digit in the leaf represents the ones.

How many students scored higher than 60 in section 1?

• 20

• 21

• 22

• 19

How many students scored higher than 60 in section 2?

• 17

• 18

• 16

• 20

What are the minimum and maximum scores in section 1?

• minimum = 40 , maximum = 95

• minimum = 95 , maximum = 40

• minimum = 91 , maximum = 90

• minimum = 90 , maximum = 41

What are the minimum and maximum scores in section 2?

• minimum = 45 , maximum = 90

• minimum = 40 , maximum = 95

• minimum = 41 , maximum = 91

• minimum = 45 , maximum = 91

Which section has more students scoring 80 or more?

• Section 3

• Section 1

• Section 2

• Both same

The back to back stem and leaf plot below shows the LDL cholesterol levels (in milligram per deciliter mg/dL) of two groups of people, smokers and non smokers. The digits in the stem represents the hundreds and tens and the digit in the leaf represents the ones.

People with a cholesterol level of 129 or less are said to have a near ideal level of cholesterol. How many people, in each group, have a near ideal level of cholesterol?

• smokers: 5 people , non smokers: 10 people

• smokers: 2 people , non smokers: 12 people

• smokers: 3 people , non smokers: 13 people

• smokers: 4 people , non smokers: 13 people

People with a cholesterol level between 160 and 189 inclusive are said to have a high level of cholesterol. How many people, in each group, have a high level of cholesterol?

• smokers: 15 people , non smokers: 14 people

• smokers: 14 people , non smokers: 5 people

• smokers: 6 people , non smokers: 15 people

• smokers: 15 people , non smokers: 6 people

Compare the median of the two sections

• Smokers Median = 161 ; Non Smokers Median =137

• Smokers Median = 166 ; Non Smokers Median =138

• Smokers Median = 164 ; Non Smokers Median =138

• Smokers Median = 164 ; Non Smokers Median =137

Tom asked people in a survey how much money they could find under their sofa cushions. The stem-and-leaf plot shows the amounts of money. What is the least amount of money a person said they could find?

• 4 cents

• 45 cents

• 46 cents

• 456 cents

Which statement about the data is true?

• Two people each found 70 cents.

• Two people each found 7 cents.

• One person found 56 cents.

• Eight people found 37 cents.