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Terms in this set (35)
What is a Frequency distribution
the number of occurrence for the particular data
What is the relative frequency?
How often something happens divided by all outcomes
what is a pareto chart?
it is a bar graph at deceasing order frequency
What is histogram Chart?
The bar touches each-other
What is stem-and-leaf plot
special table where each data value is split into a "stem" (the first digit or digits) and a "leaf" (usually the last digit
What is split stem?
TO spread the values; break each leaf into two
Why use splitting stem leaf?
The organization of this stem and leaf plot does not give much information about the data. With only one stem, the leaves are overcrowded. If the leaves become too crowded, then it might be useful to split each stem into two or more components
How many shapes of a distribution.
4.
Uniform.
Bell.
Skewed right.
Skewed left.
What is Frequency Polygon?
frequency polygon is a graph constructed by using lines to join the midpoints of each interval, or bin. ... The heights of the points represent the frequencies
How frequency polygon be drawn?
A frequency polygon can be created from the histogram or by calculating the midpoints of the bins from the frequency distribution table.
What is Cumulative frequency distribution?
Add the previous/ top value with current value to get cumulative frequency.
What is a ogive?
sometimes called a cumulative frequency polygon, is a type of frequency polygon that shows cumulative frequencies
What is time series data?
if the value of variable is measured at different points in time.
What is time series plot?
plotting time on horizontal axis
What is misrepresentation of data
it is manipulating Y axis to draw data.
What is arithmetic mean?
"average" (greek letter mu "μ")
arithmetic mean is another name for the mean or the average. When someone talks about the mean of a data set, they are usually talking about the arithmetic mean
What is sample arithmetic mean
the average of particular sample.
(pronounced "x-bar")
What is arithmetic mean formula
sum of the numerical values of each and every observation, divided by the total number of observations
What is median data? M
the value that lies in the middle.
What is the formula for median data?
if it is odd, then it is exactly in the middle.
(n + 1)/2
if it is even; the median is the mean of two middle.
(n/2) + 1
How to find the median data set?
1. Arrange the date in ascending order.
2. Determine the number of observation, n.
3. Determine the observation in the middle of the data set.
What is resistant in statistic?
resistant if the value of the statistic is relatively unchanged by changes in a small portion of the data.
What is mode?
the most frequent value you see over and over again.
What is median?
Median, in statistics, is the middle value of the given list of data, when arranged in an order
What is the range in statistics?
The range, the difference between the largest value and the smallest value.
Large data minus small data.
What is standard deviation?
standard deviation is a measure of the amount of variation or dispersion of a set of values.[1] A low standard deviation indicates that the values tend to be
What is standard deviation?
" tells you how much your data is spread out. Specifically, it shows you how much your data is spread out around the mean or average. For example, are all your scores close to the average? Or are lots of scores way above (or way below) the average score?
What is a symbol for Standard Deviation?
is σ (the Greek letter sigma).
What is the formula for standard deviation?
Example of standard deviation
What is disperse?
how far values are away from each-other.
What is Range in statistics
It is a simple way of understanding how far is the spread between the largest and the smallest number.
Large number minus small number.
What is the Variance
variance is a measure of how spread out a data set is
What's the difference between standard deviation and variance?
Standard deviation is expressed in the same units as the original values (e.g., minutes or meters).
Variance is expressed in much larger units (e.g., meters squared)
What is the variance of standard deviation?
square the value
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