3.2.4 Reflection & Practice

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger population, where each individual has an equal chance of being selected. This method helps ensure that the sample represents the population accurately.

Front

How do you calculate the expected value in probability?

Back

The expected value is calculated by multiplying each possible outcome by its probability and then summing all these products. For example, if an event has outcomes A, B, and C with probabilities P(A), P(B), and P(C), the expected value E is given by E = A*P(A) + B*P(B) + C*P(C).

Front

What does the point (0, 0) represent in a graph of time vs. distance?

Back

The point (0, 0) represents the starting point, indicating that at 0 minutes, the distance covered is also 0.

Front

How do you find the mean of a set of numbers?

Back

To find the mean, add all the numbers together and then divide by the total count of numbers. For example, the mean of 2, 4, and 6 is (2+4+6)/3 = 4.

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 (impossible) and 1 (certain). It can be calculated as the number of favorable outcomes divided by the total number of possible outcomes.

Front

What is a survey?

Back

A survey is a method of collecting data by asking people questions to gather information about their opinions, behaviors, or characteristics.

Front

What is the difference between a population and a sample?

Back

A population includes all members of a specified group, while a sample is a subset of the population selected for analysis.

Front

How do you interpret survey results?

Back

Survey results are interpreted by analyzing the data collected to identify trends, patterns, and insights about the population's opinions or behaviors.

Front

What is a spinner in probability?

Back

A spinner is a circular device divided into sections, each representing a different outcome. When spun, it randomly lands on one of the sections, allowing for probability experiments.

Front

What does it mean to generalize survey results?

Back

To generalize survey results means to apply the findings from a sample to the larger population, assuming the sample accurately represents the population.