S2 Ch 6 More about Statistical Charts (Revision)

The class mark of the second class interval is

• 44 min.   

• 44.5 min.

• 45 min.   

• 45.5 min.

The lower class boundary of the class interval that has the highest frequency is

• 55 kg.  

• 55.5 kg.

• 58 kg.

• 60.5 kg.

How many students weigh 60.5 kg or above?

• 2 

• 6

• 8

• 20

Find the percentage of students who spend 50.5 min or more on revision on that night.

• 6%   

• 15%

• 25%

• 75%

Which of the following must be true?

• S2B students run faster than S2A students in general.

• No S2B students can finish 800 m in less than 3.75 min.

• The maximum time taken for S2A students to finish 800 m is 5.25 min.

• S2A students like running more than S2B students do.

Which of the following is NOT true?

• The sales in May are the highest among the three months.

• The sales in April are twice that in March.

• The sales have increased by 50% from March to May.

• The sales have increased by 10 million dollars every month from March to May.

How many students weigh 49.5 kg or above, but less than 54.5 kg?

• 1

• 2

• 3

• 4

Bella believes that the sales of bubble tea shop C are the highest among the 3 shops in that month. Which of the following is the best reason why Bella was misled by the bar chart?

• The scale of the vertical axis is inappropriate.

• The actual sales of each shop in that month are not known.

• The sales increases of other bubble tea shops are not compared.

• The month of collecting the data is not included in the bar chart.

If the speed limit is 50 km/h, how many vehicles exceed the speed limit?

• 12

• 15

• 18

• 20

Find the lower quartile of the marks.

• 10

• 41

• 44.5

• 50