Age (Years) Less than high school High school graduate Some college College Degree graduate 15 to 17 12,723 210 132 29 18 to 34 9,655 19,231 25,444 17,497 35 to 49 6,412 16,642 16,756 21,125 50+ 13,693 34,110 26,461 29,899 Figure 1 - 2013 U.S. population, in thousands, by age and educational attainment. Source: Census, U.S. Bureau of the Census Find the probability that in the year 2013, a U.S. resident was a High school graduate. Write the probability as a percent rounded to the nearest tenth
Addition Rule of Probability
It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.
Expected Value
When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known as the expectation, is denoted by: E(X).
Probability Distributions
Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosing a card. Each of these events has multiple possibilities. Every such possibility is measured with the help of probability. To be more precise, the probability is used for calculating the occurrence of events that may or may not happen. Probability does not give sure results. Unless the probability of any event is 1, the different outcomes may or may not happen in real life, regardless of how less or how more their probability is.
Basic Probability
The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the probability value 1 indicates that the event will occur. Sum of the probability value must be 1. The probability value is never a negative number. If it happens, then recheck the calculation.
question.
Age (Years) Less than high school High school graduate Some college College Degree
graduate
15 to 17 12,723 210 132 29
18 to 34 9,655 19,231 25,444 17,497
35 to 49 6,412 16,642 16,756 21,125
50+ 13,693 34,110 26,461 29,899
Figure 1 - 2013 U.S. population, in thousands, by age and educational attainment.
Source: Census, U.S. Bureau of the Census
Find the probability that in the year 2013, a U.S. resident was a High school graduate. Write
the probability as a percent rounded to the nearest tenth.
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