WGU C784 APPLIED HEALTHCARE STATISTICS FINAL EXAM 7 QUESTIONS & ANSWERS

WGU C784 APPLIED HEALTHCARE STATISTICS FINAL EXAM 7 QUESTIONS & ANSWERS
Rational number (aka 'fractional')
Numbers that can be expressed as a fraction
Integers
Solid positive and negative numbers
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Real Numbers
A real number is any number that can be placed on the number line, whether that be negative or
positive, fraction or decimal.
True or False? Any integer is also a whole number.
This statement is false. An integer can be negative, such as the number −100-100. −100-
100 is not a whole number.
Read all the options before answering. −17-17 is... (a. an integer b. a rational number c. a real
number d. all of the above.)
d. all of the above. −17-17 is an integer, and all integers are also rational numbers, which
in turn are real numbers.
Set:
In mathematics, a collection of numbers is referred to as a set*
Interval
An interval is a set of numbers between two specified values. An interval can be visualized as a
segment of the number line. The segment of the number line above that falls between 11 and
22 is called an interval*.
Discrete data
Can only have certain, distinct values
Is "counted"
Contains unconnected points
In mathematics, whole numbers, integers, and even integers are all examples of discrete sets.
These sets contain unconnected elements, with gaps between each value.
In statistics, some data sets will be discrete. Examples of discrete data sets are the number of
adults in a household, the results of rolling two dice, and number of machines in operation, as
these are distinct groups.
(Looking at another set of data, consider the number of cars someone owns. It is not possible to
own 3.43.4 cars; you either own three cars or four. The number of cars someone owns is an
example of a discrete set of data, since the values are distinct, separate, and unconnected.
Positive integers* are an example of discrete data.)
Continuous data
Can have any value within an interval
Is "measured"
Does not have clear boundaries between elements or data points
In mathematics, the set of real numbers is an example of a continuous set. This sets contains
continuous elements, with no discernible gaps between each element. Remember that the
number line is a visual representation of the set of real numbers. Just as the number line is
continuous with no gaps, so is the set of real numbers.
In statistics, some data sets will be continuous. Examples of continuous data sets are
temperature, distance, and time, as the set of possible values within these groups is continuous.
An element in these groups can hold any real number within a certain interval, dependent upon
the scale used. (A set of data is continuous if it can hold any value within the set. An example
of continuous data might be age. It is possible to be 22.6722.67 years old. Real numbers are
considered continuous.)
00, 11, 22 is a set of continuous data. True or False?
False. This statement is false. 00, 11, and 22 are distinct consecutive integers. There are
numbers, such as 1.51.5, between them, so they are not continuous.
Temperature is an example of continuous data. True or False?
This statement is true. Temperature covers an entire interval of data and can be
"measured" rather than counted, so it is continuous.
Timesheets log the days that a nurse works each week. Does the week's timesheet give data
that is discrete or continuous?
Discrete. The days of the week are discrete and do not allow for values between them.
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A graph shows the efficacy of a particular drug at different dosages. Is this data discrete or
continuous?
Discrete. The graph shows discrete drug dosages, not all possible dosages, between two
numbers.
During a physical, the nurse records the patient's age, weight, and height. Are these data
discrete or continuous?
Continuous. These are all continuous measurements for which it is possible to have
fractional parts.
<
"less than"
>
"greater than"
≤
less than or equal to
≥
greater than or equal to
Which of the following is the correct translation of −3−3-3 is less than y which is less than 4 (Both of the << symbols mean "less than," so the
correct translation is −3-3 is less than y which is less than 4.)
How would "w is less than or equal to 9, but greater than or equal to 5" be written?
9≥w≥5 (The answer is b. Both ≥≥ symbols mean "greater than or equal to,"
so 9≥w≥59≥w≥5 means "ww is less than or equal to 99, but greater than or equal to 55.)

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