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What is a z score and what its used for?
The Normal probability distribution is defined by two parameters: its mean and standard deviation (sd) and, between them, these two can define infinitely many different Normal distributions. The Normal distribution is very common but there is no simple way to use it to calculate probabilities. However, the probabilities for the Standard Normal distribution (mean = 0, sd = 1) have been calculated numerically and are tabulated for quick reference. The z-score is a linear transformation of a Normal variable and it allows any Normal distribution to be converted to the Standard Normal. Finding the relevant probabilities is then a simple task.
How do you find the probability of 2 dependent events?
That will depends entirely on how the two events are related. For instance, there may be a weak correlation, or a strong correlation, between two probabilities. You really need more information, about how the events are related. There is no single simple rule.
How do find probabilities as a fraction decimal and a percent?
This is quite a simple process. For instance if we are finding the probability that when i flip a coin it will be heads we would say it is a 50%/ 0.5 chance because it is a half chance. If we do pigs will fly it will be a 0%/ 0 chance as it will never happen as i don't think evolution will go that far. That is how you find the probability using fractions and decimals.
What is a simple event in probability?
A coin flip
What is a simple example of an empirical probability?
Emily got 12 texts and 5 were from jasmine. The probability is 5/12.
