MATH 215 MIDTERM CHEAT SHEET
ATHABASCA UNIVERSITY ACTUAL EXAM
PAPER 2026 QUESTIONS WITH ANSWERS
GRADED A+
⩥ descriptive statistics. Answer: consists of methods for organizing,
displaying, and describing data by using tables, graphs, and summary
measures
⩥ inferential stats. Answer: consists of methods that use sample results
to help make decisions or predictions about a population
⩥ Population. Answer: consists of all elements, individuals, items,
objects that are being studied
⩥ target population. Answer: the whole group you want to study or
describe
⩥ Sample. Answer: portion of the population that is being studied
⩥ survey. Answer: collecting information from the elements of a
population or sample
,⩥ Census. Answer: a survey in which the entire population is measured
⩥ sample survey. Answer: The technique of collecting information from
a portion of the population
⩥ representative sample. Answer: a sample that accurately reflects the
characteristics of the population as a whole
⩥ Random sample. Answer: a sample that fairly represents a population
because each member has an equal chance of inclusion
⩥ simple random sample. Answer: if all samples of the same size
selected from the population have the same chance of being selected
eg: the lottery
⩥ sampling with replacement. Answer: Once an element has been
included in the sample, it is returned to the population. A previously
selected element can be selected again and therefore may appear in the
sample more than once.
⩥ sampling without replacement. Answer: Once an element has been
included in the sample, it is removed from the population and cannot be
selected a second time.
, ⩥ Sampling with replacement vs. Sampling without replacement.
Answer: an element can be selected and returned (replaced) or the
sample is selected and not put back (without replacement)
⩥ Element/Member. Answer: a specific subject or object about which
the information is collected in the sample/population
⩥ Variable. Answer: A factor that can change-different values for
different elements
⩥ observation/measurement. Answer: the value of a variable for an
element
⩥ Data Set. Answer: all the data collected in a particular study
⩥ Types of Variables. Answer: qualitative and quantitative
⩥ qualitative variable. Answer: variable that can be measured
numerically
e.g. height, income, number of cars, price of homes
⩥ discret variable. Answer: a variable whose value can be counted with
no intermediate values
ATHABASCA UNIVERSITY ACTUAL EXAM
PAPER 2026 QUESTIONS WITH ANSWERS
GRADED A+
⩥ descriptive statistics. Answer: consists of methods for organizing,
displaying, and describing data by using tables, graphs, and summary
measures
⩥ inferential stats. Answer: consists of methods that use sample results
to help make decisions or predictions about a population
⩥ Population. Answer: consists of all elements, individuals, items,
objects that are being studied
⩥ target population. Answer: the whole group you want to study or
describe
⩥ Sample. Answer: portion of the population that is being studied
⩥ survey. Answer: collecting information from the elements of a
population or sample
,⩥ Census. Answer: a survey in which the entire population is measured
⩥ sample survey. Answer: The technique of collecting information from
a portion of the population
⩥ representative sample. Answer: a sample that accurately reflects the
characteristics of the population as a whole
⩥ Random sample. Answer: a sample that fairly represents a population
because each member has an equal chance of inclusion
⩥ simple random sample. Answer: if all samples of the same size
selected from the population have the same chance of being selected
eg: the lottery
⩥ sampling with replacement. Answer: Once an element has been
included in the sample, it is returned to the population. A previously
selected element can be selected again and therefore may appear in the
sample more than once.
⩥ sampling without replacement. Answer: Once an element has been
included in the sample, it is removed from the population and cannot be
selected a second time.
, ⩥ Sampling with replacement vs. Sampling without replacement.
Answer: an element can be selected and returned (replaced) or the
sample is selected and not put back (without replacement)
⩥ Element/Member. Answer: a specific subject or object about which
the information is collected in the sample/population
⩥ Variable. Answer: A factor that can change-different values for
different elements
⩥ observation/measurement. Answer: the value of a variable for an
element
⩥ Data Set. Answer: all the data collected in a particular study
⩥ Types of Variables. Answer: qualitative and quantitative
⩥ qualitative variable. Answer: variable that can be measured
numerically
e.g. height, income, number of cars, price of homes
⩥ discret variable. Answer: a variable whose value can be counted with
no intermediate values
