A normal distribution curve with a mean 0 and a standard deviation 1.
Line graph where time is the x axis
Branch of mathematics concerned with collecting, organizing, summarizing and presenting data and drawing conclusions from the data.
Separates a data set into 4 equal parts.
Q1 - 25th percentile
Q2 - 50th percentile
Q3 - 75th percentile
The side of statistics where data is collected, organized, reporting data.
Similar to a vertical bar graph, except the the bars touch, and class limits are used for the x axis
Either a rank given for a data value or the data value for which n% of data values is below it in the data set.
Find the squared deviations for every data value, add them up then divide by N - 1.
Measurements or observations that are collected for study.
Way to organize data for small data sets where the data values are separated into two parts. The right most digit is the leaf and can represent the ones or tenths digit...ect.
(Data value - Mean);
if this is found for every data value and added together, the sum will be zero.
Down
The value that occurs the most frequently in a data set.
It is possible to have none ( if all the data values have the same frequency) or more than one ( if there is a tie for the most frequent)
The side of statistics concerned with making inferences about a population.
Highest data value minus the lowest data value
Approximation for a measure of central tendency where the midpoint of a class is multiplied by the frequency of that class. This product is added for each class then divided by the total number of frequencies
The square root of the variance.
Q3 - Q1
used to find outliers in data sets.
For bell shaped or "normal" data:
about 68% of data values are within 1 standard deviation from the mean
about 95% of data values are within 2 standard deviations from the mean
about 99.7% of data values are within 3 standard deviations from the mean.
Line graph where the x axis represents the midpoint of the classes and the y axis represents the frequency of each class.
"Anchors" are used to start and stop the graph.
A value that determines how far above or below a data value is from the mean.
calculated by:
(data value - mean) divided by the standard deviation
All subjects under study.
For a sorted data set with and odd number of data values, it is the middle data value.
For a sorted data set with an even number of data values, it is the average of the middle two data values.
Arithmetic average;
Add up all the data values then divide by the total number of data values.
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