ELEMENTARY STATISTICS PICTURING THE
WORLD EXAM 2026 COMPLETE QUESTION
SET AND CORRECT ANSWERS GRADED A
PLUS
◉ point estimate.
Answer: A point estimate is a single value used to approximate a
population parameter
◉ Z-score.
Answer: When a data value is converted to a standardized scale
representing the number of standard deviations the data value lies
from the mean, we call the new value a ____________________.
◉ s.
Answer: The symbol for sample standard deviation is
__________________.
◉ Degrees of Freedom.
Answer: Degrees of Freedom Number of data points that are free to
vary based on the person who is responding (ex: mood that day, etc.;
gender is the same every day)
,◉ Population.
Answer: Population The entire collection of individuals for about
which information is sought.
◉ Sample.
Answer: A subset of a population containing individuals who are
actually observed.
◉ Simple Random Sample.
Answer: Every sample of size n has the same chance of be being
chosen (selected).
◉ Cluster Sampling.
Answer: Items are drawn from the population in groups or clusters.
◉ Systematic Sampling.
Answer: The population items are ordered in a list then every Kth
item is sampled.
◉ Voluntary Response Samples (self-selected sample).
Answer: When people choose to participate in the sample, usually
only people with strong opinions choose to participate.
, ◉ lower class limit.
Answer: the least number that can belong to a class
◉ upper class limit.
Answer: the least number that can belong to a class
◉ class width.
Answer: ________________ is found by subtracting a lower class limit
from the next consecutive lower class limit.
◉ range.
Answer: the difference between the maximum data entry and the
minimum data value
◉ census.
Answer: ____________ is NOT a measure of center
◉ data.
Answer: collection of observations, measurements, gender or survey
responses single data.
◉ measure of center.
WORLD EXAM 2026 COMPLETE QUESTION
SET AND CORRECT ANSWERS GRADED A
PLUS
◉ point estimate.
Answer: A point estimate is a single value used to approximate a
population parameter
◉ Z-score.
Answer: When a data value is converted to a standardized scale
representing the number of standard deviations the data value lies
from the mean, we call the new value a ____________________.
◉ s.
Answer: The symbol for sample standard deviation is
__________________.
◉ Degrees of Freedom.
Answer: Degrees of Freedom Number of data points that are free to
vary based on the person who is responding (ex: mood that day, etc.;
gender is the same every day)
,◉ Population.
Answer: Population The entire collection of individuals for about
which information is sought.
◉ Sample.
Answer: A subset of a population containing individuals who are
actually observed.
◉ Simple Random Sample.
Answer: Every sample of size n has the same chance of be being
chosen (selected).
◉ Cluster Sampling.
Answer: Items are drawn from the population in groups or clusters.
◉ Systematic Sampling.
Answer: The population items are ordered in a list then every Kth
item is sampled.
◉ Voluntary Response Samples (self-selected sample).
Answer: When people choose to participate in the sample, usually
only people with strong opinions choose to participate.
, ◉ lower class limit.
Answer: the least number that can belong to a class
◉ upper class limit.
Answer: the least number that can belong to a class
◉ class width.
Answer: ________________ is found by subtracting a lower class limit
from the next consecutive lower class limit.
◉ range.
Answer: the difference between the maximum data entry and the
minimum data value
◉ census.
Answer: ____________ is NOT a measure of center
◉ data.
Answer: collection of observations, measurements, gender or survey
responses single data.
◉ measure of center.
