Statistical Questions
The study of data. How to collect, summarize, and present it.
Statistics
How do you find mean, median, mode and range?
Mean: add then divide Median: middle Mode: Most Range: subtract
What is the range on slide #5?
8.5 - 4 = 4.5
What are the TWO main differences between a bar graph and a histogram?
NO SPACES and INTERVALS
What color is a giraffe's tongue?
Purple
Name the two measures of center. One measures you find by adding up all the values and dividing by how many values there are. The other measure is found by placing the values in order and finding the middle.
Mean and Median
What is the median and range?
0, 20, 25, 30, 30, 30, 50
Median = 30
Range= 50
This dot plot on slide #5 shows the number of hours 20 sixth grade students slept on a Saturday night.
Select TRUE or FALSE for the following statement: Most students slept either 7, 7.5, or 8 hours.
TRUE
What are the intervals on slide #6? How many numbers are in each interval?
1-10, 11-20, 21-30, 31-40... 10 in each interval
What type of fish is Nemo?
A clownfish
The value that occurs the MOST and the value found by SUBTRACTING the highest and lowest value
Mode and Range
What is the range?
46.1, 27.3, 40, 46.5, 15.1
46.5 - 15.1 = 31.4
How many people were surveyed on slide #5? How do you know?
20. Count up all dots
Which range of beads per necklace is the most common on slide #6?
21-30
How many Harry Potter books and movies are there?
7 books and 8 movies.
Explain the difference between a Statistical Question and a NON Statistical Question using the words variability and data
Question that has variability in the data and a question that has no variability in the data
What is the mean?
46.1, 27.3, 40, 46.5, 15.1
35
Where is the peak on slide #5?
8 Hours (the tallest part of the dot plot)
56, 58, 58, 64, 65, 66, 68, 70, 70, 72, 73, 75 What 5 values do you need to create a box and whisker for the data above? DO IT
median=77 LQ=61 UQ=71 min= 56 max= 75
How many teeth does a human have?
32
Write 2 STATISTICAL QUESTIONS. One question must have NUMERICAL data and the other must have CATEGORICAL data
What are the shirt sizes of the students in the 6th grade class? What is everyone's favorite ice cream?
4, 6, 8, 8, 9 Find MAD
Hints:
step 1: Find the mean
Step 2: Subtract the mean form each number
Step 3: Find the mean of those differences
1.6
Is the data on slide 5 skewed left, skewed right, or symmetrical?
Skewed left (most data is on the right)
Select TRUE or FALSE for the following statement: Given a HISTOGRAM, it is always possible to construct a corresponding BOX PLOT.
FALSE
What is the world's largest ocean?
Pacific Ocean