Idea 7of 22Builds onImpossible is 0, certain is 1
Unlikely, even chance, likely
What do the places between 0 and 1 mean?
Today you'll discover
- what 1/2 means
- which side is unlikely
- which side is likely
Think firstA spinner that is half orange
A spinner is half orange. Where does landing on orange go on the line?
Decide first, then press Next. Find 1/2, then look left or right of it.
A line from 0 to 1 with impossible and certain under the ends. Then 1/2 is marked in the middle with the words unlikely, even chance and likely under the line. Pointers place three spinners' chances of orange at 1/4, 1/2 and 5/6, and an arrow under them reads further right: more likely. The last step shows a spinner that is 7/8 blue.
See the whole ideathe big idea and the key word, in one place
The big idea
Below 1/2 is unlikely, 1/2 is an even chance, and above 1/2 is likely.
Along the line
Five words, from 0 to 1.
- impossible0
- unlikelybelow 1/2
- even chance1/2
- likelyabove 1/2
- certain1
Easy to get wrongNot certain does not mean unlikely. 7/8 is not 1, but it is very likely.
Key words
- unlikely
- probably will not happen; a probability less than 1/2
- even chance
- as likely to happen as not; a probability of 1/2
- likely
- probably will happen; a probability more than 1/2
Ready to use it?
- Describe a probability as unlikely, an even chance or likely.
- Order events from least to most likely.