Statistical Questions
Statistical or Non-Statistical:
How many quarters does it take to make a dollar?
Non-Statistical
True or False: You can tell specifics about a data set in a histogram.
Ex. How many dogs weigh exactly 24 pounds.
False!
Data is sorted into bins and not easily identifiable for specifics.
What is another word for mean?
Average
What does MAD stand for?
Mean Absolute Deviation
Statistical or Non-Statistical:
In what year was the first nickel made in the United States?
Non-Statistical
How can you determine how many items are being represented on the dot plot?
Count the number of dots you see.
When is it beneficial to use a histogram?
A lot of data! Too many dots to represent on a dot plot.
What does the mean measure?
Measure of center
(typical value)
What does the MAD measure?
The spread
(variability)
Statistical or Non-Statistical:
Among all of the dimes at a bank, what is the most frequent year the dimes were made?
Statistical!
You would have to check every dime and record the year it was made. Dimes would have a variety of dates.
What symbol do we use to mark the mean on a dot plot?
Triangle
Here is a data set:
2, 4, 4, 5, 6, 7
What is the frequency of a bin labeled "0-5" on a histogram?
3
(2, 4, 4)
What is the formula to find mean?
Sum of the items / number of items added = mean
What is the FIRST thing you have to find in the steps to solve for MAD?
(MAD: 1, 2, 3)
The data set's mean
Statistical or Non-Statistical:
What coin (penny, nickel, dime, or quarter) is used most frequently in transactions at a bank?
Statistical!
You would have to record coins used in every transactions - all with different frequencies of coins used.
True or False: If there are many of one number in a dot plot, it is shown by dots in a vertical line above the number.
True
True or False: The measure of center can be seen on a histogram by the tallest bar created by the data.
False! Just because it is the tallest doesn't make it the measure of center. Find a point where the data set is split half and half to find the measure of center.
Find the mean of the following data set:
4, 8, 10, 2
mean = 6
What is the SECOND thing you have to find in the steps to solve for MAD?
(MAD: 1, 2, 3)
Every items distance from the mean (subtraction)
Statistical or Non-Statistical:
On average, how many pennies do people receive in change when they make a purchase at a store?
Statistical!
You would have to record every customer's change and number of pennies they receive - all customers would have a different number of pennies.
The spread! The bigger the spread, the wider the variability. The smaller the spread, the smaller the variability.
Here is the data set of ages of siblings:
5, 14, 15, 15, 16
Would you say anyone has an unusual age?
Yes, age 5 is unusual in the data set of ages of siblings.
The mean of four numbers is 8. Three of the four numbers are 5, 9, and 14. What is the fourth number?
4
What is the THIRD thing you have to find in the steps to solve for MAD?
(MAD: 1, 2, 3)
The mean of the distances.