Flashcards
Probability
Cards in this deck (18)
- 1How do you find the number of samples from each group?
- 2What is mode, median, mean and rangemode = most common
median = middle value
mean = total of items ÷ number of items
range = difference between highest and lowest - 3Quartiles divide data into ___ equal groups the quartiles are __%, 50%, 75% and ___%4
25
100 - 4In terms of frequency tables, what is the mode, median, mean and range?mode = category with the most entries
median = category of the middle value
mean = fx column ÷ frequency
range = the difference of the extremes of the categories - 5how do you find the mid point of categories?Add together the en values of the class and divide by 2
- 6To find a mean, in group frequency tables you add a third column and enter the ________value of each class. Then add a fourth column to show frequency x _______value of each classMid interval
Mid interval - 7Give the equation for frequency density?Frequency ÷ Class Width
- 8A strong correlation is when...The points make a relatively straight line
- 9Weak correlation is when...The points don't line up but still trend and can form a LOBF
- 10What is positive/negative correlation?Positive - Slopes up
Negative - Slopes down - 11When does a scatter graph have no correlation?When you cannot draw a LOBF
- 12Give the formula of probabilityNumber of ways for something to happen
__________________________________________
Total number of possible results - 13Formula for expected frequencyExpected Times Outcome will happen = Probability x number of trails
- 14Give the AND ruleP(A and B) = P(A) x P(B)
- 15Give the OR ruleP(A or B) = P(A) + P(B)
- 16Give the formula for relative frequencyFrequency
______________________
Number of trails - 17big PP?or big PP energy?
(U have the small pp) - 18In a histogram graph, what does the area of a bar represent?Frequency
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- GCSE Maths (probability and statistics) Flashcards on Probability, created by lizabeth rawson on 02/03/2020.
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- lizabeth rawson
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