An unprepared student takes a three-question, true/talse quiz in which he guesses the answers to all three questions, so each answer is equally Iikely to be correct or wrong. Complete parts (a) through (d) below. Are the outcomes in S equally ikely? O A. Yes. Since the student studied for the test, the ikelihood the student gets the answer correct is the same as the ikelihood they get it wrong. B. No. Because the student studied for the test, the likelihood that the student gets more answers correct is higher than the Ikelihood that the student gets more answers wrong C. No. Because the student guesses on each of the problems, the likeihood the student gets the answer correct is not the same as the likelihood they get it wrong. OD. Yes. Because the student guesses on each of the problems, the likelihood the student gets the answer correct is the same as the likelihood they get it wrong. (b) Write the following event in set notation. The student gets three answers corect. (Use a comma to separate answers as needed.) (C) Write the following event in set notation. The student gets exactly two answers wrong. Click to select your answer(s).
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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