It means to guess what might happen next
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youre question has many flaws and is ambiguous
It means that the random variable in question is considerably greater than the mean.
The question is unclear. What do you mean by "almost heads". Please restate the question.
you explain how to solve this question? If there is an equation that I can use will be appreciated. 70% of students answered question A correctly, 55% of students answered question B correctly, 20% of students answered neither question correctly. What is the percentage of students answered both question A and B correctly?
This question cannot be answered. You need the mean and standard deviation in order to compute a Z score for a Raw score. Please restate the question.