Knowledge of probability, statistics, and data interpretation - FTCE
Card 0 of 2
What is the likelihood, expressed as a percentage, of rolling 2 straight 2s using one 6-sided dice?
What is the likelihood, expressed as a percentage, of rolling 2 straight 2s using one 6-sided dice?
The likelihood of rolling any given number on a 6-sided dice is 16.6%, to get the likelihood of that even happening twice in a row, simply multiply 16.6% by itself, to get 2.7%, rounded up to 3%
The likelihood of rolling any given number on a 6-sided dice is 16.6%, to get the likelihood of that even happening twice in a row, simply multiply 16.6% by itself, to get 2.7%, rounded up to 3%
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A set of ten scores has mean 30.
Nine of the scores are given below, with the circle representing the tenth.
What is the tenth score?
A set of ten scores has mean 30.
Nine of the scores are given below, with the circle representing the tenth.
What is the tenth score?
The mean of a group of scores 
is equal to their sum 
divided by the number of scores 
, or,
Set 
and 
, and solve for 
:
Multiply both sides by 10 to reverse division by 10:
The sum of the scores must be 300. Add the known scores:
Subtract this sum from 300:
,
the missing tenth score.
The mean of a group of scores
Set
Multiply both sides by 10 to reverse division by 10:
The sum of the scores must be 300. Add the known scores:
Subtract this sum from 300:
the missing tenth score.
Compare your answer with the correct one above