Asked by Jessica Cabrera on Jun 03, 2024
Verified
A score that is 2.5 standard deviations below the mean would have a z score of ______.
A) -2.5
B) 2.5
C) 0
D) 25
Standard Deviations
A measure of the amount of variation or dispersion of a set of values from the mean.
Z Score
A statistical measurement that describes a value's relationship to the mean of a group of values, expressed in standard deviations.
Mean
The arithmetic average of a set of numbers, calculated by dividing the sum of the numbers by the count of numbers in the set.
- Master the notion and utilization of z scores in the context of statistical studies.
Verified Answer
ZK
Zybrea KnightJun 04, 2024
Final Answer :
A
Explanation :
A z-score reflects how many standard deviations a data point is from the mean. If a score is 2.5 standard deviations below the mean, it is considered a low score. The z-score for this score would be -2.5, indicating it is 2.5 standard deviations below the mean. Therefore, the correct answer is A.
Learning Objectives
- Master the notion and utilization of z scores in the context of statistical studies.