This document discusses statistics and statistical questions. It defines statistics as collecting, organizing, and analyzing data in a systematic way. It describes descriptive statistics as using numerical and graphical methods to summarize data, and inferential statistics as generalizing results from samples to populations. Examples are given of statistical and non-statistical questions. The document also includes a sample survey about athletes' practice time.

3. •

4. •
•

5. Biscuits
Biscuits
Junk foods
Spaghetti
Spaghetti
Spaghetti
Spaghetti
Biscuits
Spaghetti
Junk foods
Spaghetti
Spaghetti Spaghetti
Junk foods
Junk foods
Spaghetti
Biscuits
Spaghetti Junk foods
Biscuits
Biscuits Spaghetti Biscuits
Spaghetti
Junk foods

7. Statistics is the science of collecting,
organizing, presenting, analyzing,
and interpreting data collected in a
systematic manner with a definite
purpose.

10. 1. DESCRIPTIVE STATISTICS
Descriptive Statistics is the branch
of Statistics that utilizes numerical and
graphical methods to reveal patterns
in a data set, to summarize the
information shown in a data set, and
to present the information in

11. 2. INFERENTIAL STATISTICS
Inferential Statistics is the branch of
Statistics that uses methods of
generalizing results from a sample to
the population and measuring their
reliability

12. 1. What percent of PNHS students are living
below the poverty line?
2. What is the school’s enrolment rate for the
past three years?
3. A couple has four boys. The mother is
pregnant again. What is the chance that they
will have another boy?

13. • What do 7th graders
prefer to eat for recess?
• What time did the
students in this class get
up this morning?
• What is the typical
number of pets owned by
• What did Yussif eat for
breakfast?
• Did you get up on time for
lunch?
• How many brothers does
Martha have?

14. • Statistical questions are
those that need
investigation by collecting
set of data.
• A statistical question is a
question that should have
different answers.
• A question is not
statistical if it has an
exact answer.

15. • What do 7th graders
prefer to eat for recess?
• What time did the
students in this class get
up this morning?
• What is the typical
number of pets owned by
• What did Yussif eat for
breakfast?
• Did you get up on time for
lunch?
• How many brothers does
Martha have?

38. In a survey about practice
time per week for high school
athletes,
22% practice 1 hour,
40% practice 2 hours,
25% practice 3 hours,
10% practice 4 hours, and
3% practice more than 4
hours.

40. The pictures are examples of
situations where Statistics can be
applied. Choose two pictures you
are interested with. Write one
question related to each picture
whose answers can be obtained
using Statistics.

41. •
•
•
•
•

42. •

43. •

44. •

45. •

46. •

48. •
•
• not
•
• not
•

49. •
•
•
•