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Pax RN math Exam Study Questions and Answers 100% Correct
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Pax RN math Exam Study Questions andAnswers 100% Correct
Sphere Volume Formula
V=4/3πr³
surface area of a sphere formula
4πr^2
Volume of a Cylinder Formula
V=πr²h
Volume of a Cone Formula
V=1/3πr²h
Surface Area of a Cylinder
2πrh+2πr²
Histogram
A graph of vertical bars representing the frequency distribution of a set of data.
Box Plot (Box and Whisker Plot)
Shows distribution of data values on a number line. Divided into quartiles.
Lower extreme (lowest volume that's not an outlier)
Higher extreme (highest volume that's not an outlier)
Median ( 2nd quartile)
3rd quartile
1st quartile
Scatterplot
a graphical depiction of the relationship between two variables
Independent variable is placed on x axis Dependent variable is
placed on y axis
If line falls from left to right then correlation is negative If
roses from left to right correlation is positive
No correlation is simply scattered with no clear pattern
line graph
Compares variables that change continuously, typically over time
, Line Plot/Dot Plot
Displays the frequency of data on a number like
circle graph (pie chart)
Shows categorical data with each category representing a percentage of whole data set
stem and leaf plot
Method displaying sets of data by organizing the numbers by their stems (usually tens digit)
and the different lead values (usually one's digit)
stem and leaf plot picture
What is the mean of data and how do you find it
The average of data
Found by adding up all the data points, then dividing by the total number of data points.
How can mean be expressed
Using summation notation
Outlier
a data point that is substantially outside the normal range of the data points being analyzed
Median
Middle number (make sure to put numbers in order before trying to determine the median)
When is median a good value to use
If there are a few outliers in data, having a lot of outliers affects the mean more than median
Mode
The value that occurs most frequently in a given data set.
If two or more data points occur equally then all are considered the mode
first quartile
the median of the first half of the data set or the largest value of the first 1/4 of data points
What does it mean if data lies in the first quartile ? At the first quartile ?
In = less than or equal to the median of the first half of data points
At = equal to the first quartile
What does jt mean if data lies in the second quartile
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