The following table represents the highest educational attainment of all adult residents in a certain town. If a resident who has only completed some college is chosen at random, what is the probability that they are aged 40 or over? Round your answer to the nearest thousandth. Age 20-29 Age 30-39 Age 40-49 Age 50 & over Total High school only 1490 1356 968 1448 5262 Some college 1407 1173 1405 1158 5143 Bachelor's degree 1159 800 1386 1820 5165 Master's degree 549 487 494 1402 2932 Total 4605 3816 4253 5828 18502
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.
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Conditional Probability from Table (L2)
Mar 02, 8:15:20 PM
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The following table represents the highest educational attainment of all adult
residents in a certain town. If a resident who has only completed some college is
chosen at random, what is the probability that they are aged 40 or over? Round your
answer to the nearest thousandth.
Age 20-29 Age 30-39 Age 40-49 Age 50 & over Total
High school only
1490
1356
968
1448
5262
Some college
1407
1173
1405
1158
5143
Bachelor's degree
1159
800
1386
1820
5165
Master's degree
549
487
494
1402
2932
Total
4605
3816
4253
5828
18502
E 00
Answer:
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