MA 251 UNIT 1 A Review #1
Flashcard
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Mathematics
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10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are quantitative variables?
Back
Quantitative variables are numerical values that represent measurable quantities, such as height, weight, or age.
2.
FLASHCARD QUESTION
Front
What is an observational unit?
Back
An observational unit is the entity or item from which data is collected in a study, such as a granola bar or a grocery store.
3.
FLASHCARD QUESTION
Front
What is the mean in statistics?
Back
The mean is the average of a set of numbers, calculated by dividing the sum of all values by the number of values.
4.
FLASHCARD QUESTION
Front
What is variance?
Back
Variance is a measure of how much values in a data set differ from the mean, calculated as the average of the squared differences from the mean.
5.
FLASHCARD QUESTION
Front
What is the standard deviation?
Back
Standard deviation is the square root of the variance and indicates the amount of variation or dispersion in a set of values.
6.
FLASHCARD QUESTION
Front
What is the median?
Back
The median is the middle value in a data set when the values are arranged in ascending order.
7.
FLASHCARD QUESTION
Front
What is the interquartile range (IQR)?
Back
The IQR is the difference between the first quartile (Q1) and the third quartile (Q3) and measures the spread of the middle 50% of the data.
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