WGU Applied Healthcare Statistics Exam 1 Questions and Answers

WGU Applied Healthcare Statistics
Exam 1 2024/2025
addition principle of equality (CORRECT ANSWER) The fact that we can add the
same number to both sides of an equation, and the result will be an equivalent
equation.

Addition Rule of Probability (CORRECT ANSWER) Used to determine the probability
that at least one of two events will occur.

P(A or B) = P(A) + P(B) - P(AB)

additive inverse (CORRECT ANSWER) Two integers that are opposites. The sum of
an integer and its additive inverse is zero. (-3, 0, and 3)

association (CORRECT ANSWER) A pattern or relationship between two variables.

bar chart (CORRECT ANSWER) A graph that displays data that is distributed over
groups or categories.

bimodal (CORRECT ANSWER) a data set which has two modes/peaks in the graph

box plot (CORRECT ANSWER) A graph that displays the highest and lowest
quarters of data on each end of the box, the middle two quarters of the data as a
box, and the median

categorical data (CORRECT ANSWER) Also called Qualitative data. Data that
consists of names, labels, or other nonnumerical values

casual relationship (CORRECT ANSWER) a relationship between two variables:
cause and effect

coefficient (CORRECT ANSWER) a number multiplied by a variable.

combining like terms (CORRECT ANSWER) when you simplify an algebraic
expression

composite number (CORRECT ANSWER) A number with more than two factors

conditional percentage (CORRECT ANSWER) a way to approximate percentage by
dividing the number of times an event occurred in an experiment by the total number
of experiments/ relative frequency

, contingency table (CORRECT ANSWER) A contingency table displays counts and,
sometimes, percentages of individuals falling into named categories on two or more
variables.

correlation (CORRECT ANSWER) an observed relationship between two
quantitative variables.

Cumulative Property (CORRECT ANSWER) the sum of probabilities. the chance that
a randomly selected score will be less than or equal to a specified value.

degrees of freedom (CORRECT ANSWER) n-1 (any # minus 1)

dependent events (CORRECT ANSWER) Two or more events in which the outcome
of one event affects the outcome of the other event(s).

discrete data (CORRECT ANSWER) a collection of numbers whose values are
distinct, separate and unconnected

disjoint (CORRECT ANSWER) two events that have no outcomes in common

dot plot (CORRECT ANSWER) a graphical display of data using dots

empty set (CORRECT ANSWER) a set with no elements

empirical probability (CORRECT ANSWER) based on observations obtained from
probability experiments

equivalent fractions (CORRECT ANSWER) Fractions that have the same value

five-number summary (CORRECT ANSWER) minimum, 1st quartile, median, 3rd
quartile, maximum

frequency distribution (CORRECT ANSWER) a record of the number of ties data
occurs within a certain category

histogram (CORRECT ANSWER) a bar graph depicting a frequency distribution

identity property (CORRECT ANSWER) a) the sum of a number and 0 is the
number;
b) the product of a number and 1 is the number

improper fraction (CORRECT ANSWER) a fraction whose numerator is larger than
the denominator

Interquartile Range (IQR) (CORRECT ANSWER) the difference between the first
and third quartiles

joint frequencies (CORRECT ANSWER) Frequencies for each cell in a two-way table
relative to the total number of data.