AlgII Stats Practice

Front

What is the formula to calculate the percentage of students who passed a test?

Back

Percentage of students who passed = (Number of students who passed / Total number of students) x 100

Front

If 82% of 400 students attempted a test, how many students is that?

Back

328 students attempted the test (0.82 x 400 = 328).

Front

What is the margin of error in a survey?

Back

The margin of error is a statistic that expresses the amount of random sampling error in a survey's results.

Front

How do you calculate the original price of an item with a service fee included?

Back

Original Price = Final Price / (1 + Service Fee Rate).

Front

What is the median in a set of numbers?

Back

The median is the middle value when the numbers are arranged in order.

Front

How do you find the percent decrease in price?

Back

Percent Decrease = ((Old Price - New Price) / Old Price) x 100.

Front

If a number x > 3 is added to a list with a median of 3, what happens to the median?

Back

The median will be larger than 3.

Front

What does it mean if a survey result has a margin of error of 2%?

Back

It means the true value could be 2% higher or lower than the reported percentage.

Front

How do you determine the number of students who failed a test if you know the pass rate?

Back

Number of students who failed = Total students - Number of students who passed.

Front

What is the significance of a 4.15% service fee in pricing?

Back

It indicates that the final price includes an additional charge on top of the original price.