Prob and Stat - Weekly Test #2

Front

What is the probability of rolling an even number on a standard six-sided die?

Back

An equal chance/50-50.

Front

What is the probability of selecting a number greater than 5 from the range 0-10?

Back

5/11.

Front

If Steve scored an 88 on his math test and the class average was 78 with a standard deviation of 5, what percent of students scored higher than Steve?

Back

2.5%.

Front

What does the z-score represent in statistics?

Back

The amount of standard deviations a data value is above or below the mean.

Front

What percent of students have a GPA between 2.9 and 3.8 if the mean GPA is 3.2 with a standard deviation of 0.3?

Back

81.5%.

Front

Define probability in the context of rolling a die.

Back

Probability is the measure of the likelihood that an event will occur, expressed as a ratio of favorable outcomes to total outcomes.

Front

What is a standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

Explain the concept of a normal distribution.

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values).

Front

What does it mean if an event is described as 'certain'?

Back

It means the probability of the event occurring is 1.