statistics review

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•
Mathematics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is variability in statistics?
Back
Variability refers to how spread out or dispersed the values in a data set are. It indicates the degree of variation from the mean.
2.
FLASHCARD QUESTION
Front
How do you find the upper quartile (Q3) of a data set?
Back
To find Q3, first arrange the data in ascending order, then find the median of the upper half of the data set.
3.
FLASHCARD QUESTION
Front
What effect does removing an outlier have on the mean of a data set?
Back
Removing an outlier can increase or decrease the mean, depending on whether the outlier is above or below the mean.
4.
FLASHCARD QUESTION
Front
What is the median of a data set?
Back
The median is the middle value when the data set is ordered from least to greatest. If there is an even number of observations, it is the average of the two middle values.
5.
FLASHCARD QUESTION
Front
How do you calculate the standard deviation of a data set?
Back
Standard deviation is calculated by finding the square root of the variance, which is the average of the squared differences from the mean.
6.
FLASHCARD QUESTION
Front
What is the difference between mean and median?
Back
The mean is the average of all values, while the median is the middle value that separates the higher half from the lower half of the data set.
7.
FLASHCARD QUESTION
Front
What does it mean if two data sets have the same median?
Back
If two data sets have the same median, it means that the central tendency of both data sets is the same, but their distributions may differ.
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