Five hundred students are interviewed about their ways to get to school. The results are summarized in the table. Select all the statements that must be true about a student chosen at random from those interviewed. bus car other total middle school 124 38 5. 167 high school 136 185 12 333 total 260 223 17 500 O a The probability that the selected student used the bus to get to school under the condition that the student 260 is in middle school is 500. O b 223 The probability that the selected middle school or high school student used a car to get to school is 500. 390 The probability that the selected student used a car to get to school or is a middle school student is 500. The probability that the selected student used a car or bús to get to school under the condition that the 321 student is in high school is 333. O e The probability that the selected student is in middle school under the condition that the student takes the 124 bus to school is 333. O f P(bus | middle school) > P(bus | high school) 38 P(car) = 500
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.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
