Statistical questions and data collection
A question that can be answered by collecting data and where you expect the answers to vary is called a __________________.
statistical question
In statistics, which term refers to the number of times a specific value or category occurs in a data set.
Frequency
What represents the data value or category that appears most frequently.
mode
This essential graph element tells the reader which color or pattern represents which group on a double bar graph.
legend or key
In a stem-and-leaf plot showing test scores, the number '43'would typically have '4' in which section and '3' in which section.
4 in stem, 3 in leaf
What is your favorite pet: dog, cat, fish, or bird?" is an example of what type of question?
closed-list question
A table that lists categories in one column and uses tally marks or numbers to count how many data points fit into each category is called this.
frequency table
In the data set {4, 7, 7, 9, 12, 14, 14, 14, 20}, which number is the mode?
14
Double bar graphs are best suited for comparing how many sets of data across the same categories.
In a stem-and-leaf plot, the "leaf" almost always represents this place value of a number.
ones place
"What do you like to do on the weekend?" is a ________________ question because respondents can give any answer they want without predefined choices.
open-ended question
In a frequency table of favorite ice cream flavors, Vanilla has 14 tallies, Chocolate has 9, and Strawberry has 5. This is the total number of students surveyed.
28
If a survey of shoe sizes yields the data {5, 5, 6, 7, 8, 8, 9}, this data set has how many modes.
2 (5 and 8)
On a bar graph with a scale counting by 5s, a bar that stops exactly halfway between 15 and 20 represents what frequency value?
17.5 (17 or 18 accepted)
Look at this stem-and-leaf plot row:
5 | 1, 2, 2, 7
This is the mode of this row.
52
If you want to easily count and organize survey responses into a frequency table, which type of question (open-ended or closed-list) is usually better to use?
closed-list question
In a frequency table of favorite school subjects, Math has 8 tallies, Science has 11, and Art has 6. What is the total frequency of students surveyed?
25 students
In the data set {10, 15, 20, 25, 30}, where every number appears exactly once, the mode is ________.
There is no mode
If your frequencies range from 0 to 80, choosing a scale that counts by which interval is much more practical than counting by 1s.
10's
On a dot plot showing how many pets each Grade 5 student owns, what does a single dot above the number 2 represent?
one student has 2 pets
"How many siblings do you have?" is an open ended quesion? True or flase.
True - if there is not a closed list of choices, it is open ended becuase there can be many different answers.
In a frequency table, if the category "Recess Activities" lists 4 students for Soccer, 6 for Tag, and 5 for Basketball, which activity has the highest frequency?
tag
On a bar graph showing categorical data, you can quickly identify the mode by looking for this feature.
The tallest bar
On a double bar graph comparing boys' and girls' favorite recess activities, the "Tag" category has a blue bar (boys) at 12 and a red bar (girls) at 15. What is the total number of students who chose Tag?
27 students
On a dot plot tracking shoe sizes, the column above size 6 has 7 dots, size 7 has 4 dots, and size 8 has 5 dots. Which shoe size is the mode?
size 6