Statistics

Mean, median and mode

6 flashcards · Mathematics · by lakesare

1. 23, 29, 20, 32, 23, 21, 33, 25 Find mean.

   'Average' we're used to:

2. 23, 29, 20, 32, 23, 21, 33, 25 Find median.

   Middle number after ordering them: If amount of numbers is even, then take 2 middle numbers and take their mean.

3. 23, 29, 20, 32, 23, 21, 33, 25 Find mode.

   Number that shows up the most.

4. 23, 29, 20, 32, 23, 21, 33, 25 Name 3 ways of calculating the average of these numbers.

   mean: regular meaning of 'average' median: middle (physically) value after ordering mode: most often

5. What's percentile rank?

   The percentile rank of a score is the percentage of scores in its frequency distribution that are equal to or lower than it. For example, a test score that is greater than 75% of the scores of people taking the test is said to be at the 75th percentile, where 75 is the percentile rank.

6. What's frequency distribution?

   In statistics, a frequency distribution is a list, table or graph that displays the frequency of various outcomes in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval.