Data analysis

Data is​ (a)   that can be organized in ​ (b)   . Bar charts and ​ (c)   are useful to visualize and represent data.

• information
• frequency tables
• graphs

An example of categorical data is:

• Age

• Year of birth

• Favorite song

• Height

CSJB is making a survey asking the students of Ciclo III about their favorite subject.

Which two statements are correct?

• The students of Ciclo III are the population of the study

• The students of CSJB are the data

• 4th grade is a sample from the population.

• Arts is the most popular subject

Rosie is studying for an exam. The pictogram shows how many hours she spent studying over five days.

How many hours did Rosie spend in total?

• 6 hours

• 5 hours and a half

• 12 hours

• 2 hours

An example of numerical data is:

• Time students go to bed

• Last name of people

• Favorite food

• Number of students in a classroom

A bookshop made a line graph of the number of books it sold per week during a certain period.

How many more books were sold in week 7 than 8?

• 9 books

• 90 books

• 100 books

• 80 books

Rock Restaurant surveyed a sample of customers on their favorite food. They made a pie graph with the survey results.

How many customers prefer hotdog, burger and sandwich?

• 62 customers

• 37 customers

• 48 customers

• 95 customers

Lisa is a small-time entrepreneur; she sells burger, pizza, hot dog and fried chicken. The tally chart shows how many of each kind were sold during the weekends.

What is the total of food items Lisa sold?

• 55 food items

• 65 food items

• 60 food items

• 50 food items