The document discusses different statistical concepts including mode, median, probability, outcomes, and events. It provides examples to illustrate each concept. The mode is the number that occurs most frequently in a data set. The median is the middle value when values are arranged in order. Probability is the likelihood of an event occurring and can be expressed as a fraction or percentage. Outcomes are the possible results of an event.
7. ā¢ The "mode" is the value that occurs most
often. If no number is repeated, then there
is no mode for the list
ā¢ For example if we have to find the mode of
the following series-
ā¢ 13, 18, 13, 14, 13, 16, 14, 21, 13
ā¢ . The mode is the number that is repeated
more often than any other, so 13 is the
mode.
8. ā¢ Median is the middle value of the given numbers
or distribution in their ascending order. Median is
the average value of the two middle elements
when the size of the distribution is even.
9. Example 1: To find the median of 4,5,7,2,1Example 1: To find the median of 4,5,7,2,1
[ODD].[ODD].
Step 1:Step 1: Count the total numbers given.Count the total numbers given.
There are 5 elements or numbers inThere are 5 elements or numbers in
the distributionthe distribution
Step 2:Step 2: Arrange the numbers in ascendingArrange the numbers in ascending
order.order.
1,2,4,5,71,2,4,5,7
Step 3:Step 3: The total elements in theThe total elements in the
distribution (5) is odd.distribution (5) is odd.
The middle position can beThe middle position can be
calculated using the formula. (n+1)/2calculated using the formula. (n+1)/2
So the middle position is (5+1)/2 =So the middle position is (5+1)/2 =
6/2 = 36/2 = 3
The number at 3rd position is =The number at 3rd position is =
Median = 4Median = 4
13. ā¢ Probability is the chance that something will
happen - how likely it is that some event will
happen.
Sometimes you can measure a probability with a
number: "10% chance of rain", or you can use
words such as impossible, unlikely, possible, even
chance, likely and certain.
Example: "It is unlikely to rain tomorrow".