stats

What is the interquartile range?

• 4
• 6
• 2
• 8

What do you do if there are two numbers in "the middle" when you are finding the median?

• Pick your favorite number
• Add the two numbers in the middle & then divide by two.
• They are both the median
• None of the above

A normal distribution of 126,000 test scores has a mean of 80 and a standard deviation of 7.5. Approximately how many students scored above 95?

• 3465

• 2383

• 2345

• 2230

7. A public library asked every 10th person who entered to name the type of book they were getting

• Biased
• Unbiased