Understanding Mean and Standard Deviation

What is the first step you should take when solving a standard deviation problem?

• Ask for help immediately.

• Directly look at the answer choices.

• Try solving the problem independently.

• Calculate the median of the data set.

How do you calculate the mean of a data set?

• Identify the most frequently occurring number.

• Find the middle number in the sorted list.

• Subtract the smallest number from the largest.

• Add all numbers and divide by the number of numbers.

If two data sets have the same mean, what can be inferred?

• They have the same range.

• Their average values are equal.

• They have the same standard deviation.

• They have the same number of elements.

What does a higher standard deviation indicate about a data set?

• The data set has more elements.

• The mean is higher.

• The numbers are more spread out.

• The numbers are closer to the mean.

Which list has a lower standard deviation if the numbers are closer to the mean?

• Both lists have the same standard deviation.

• It cannot be determined.

• List B

• List A