Data Analysis Flashcards
7 cards from real CAASPP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Data Analysis flashcards as text
A scatter plot shows points clustered tightly around a line going from lower-left to upper-right. What does this indicate?
Answer: A strong positive correlation
Points clustered tightly around an upward-sloping line indicate a strong positive correlation between the two variables.
A data set has values: 4, 7, 7, 9, 13. What is the median?
Answer: 7
With 5 ordered values, the median is the middle (3rd) value, which is 7.
Which measure of center is most affected by an outlier in a data set?
Answer: Mean
The mean uses all values in its calculation, so a very large or small outlier pulls it significantly.
A box plot shows a box from 20 to 40, with a median line at 30 and whiskers from 10 to 50. What is the interquartile range (IQR)?
Answer: 20
The IQR is Q3 minus Q1, which equals 40 − 20 = 20.
In a frequency table, the relative frequency of an event is calculated by dividing the event's frequency by what?
Answer: The total number of observations
Relative frequency = (frequency of the event) ÷ (total number of observations).
A line graph shows a city's population rising steadily from 2000 to 2020. Which prediction is best supported by the graph?
Answer: The population will likely continue rising past 2020
A steady upward trend provides the best support for predicting continued growth, assuming the trend holds.
Two data sets each have a mean of 50, but Set A has a larger standard deviation than Set B. What does this mean?
Answer: Set A's data is more spread out from the mean
A larger standard deviation indicates that the values in Set A are more spread out (vary more) from the mean.