Use the following information for questions:
Spatial perception is measured on a scale from 0 to 10. Two groups of 8 th grade children are tested for spatial perception. The students in group 1 were first given a short course on spatial concepts. The students in group 2 received no such instruction. SPSS was used to calculate descriptive statistics for the two samples.
-What is the value of the standard deviation for measurements made on the group 1 students, which is missing in the output?
A) 1.732
B) 3.807
C) 1.269
D) 0.141

Question

Use the following information for questions:
 Spatial perception is measured on a scale from 0 to 10. Two groups of 8 th grade children are tested for spatial perception. The students in group 1 were first given a short course on spatial concepts. The students in group 2 received no such instruction. SPSS was used to calculate descriptive statistics for the two samples. 
-What is the value of the standard deviation for measurements made on the group 1 students, which is missing in the output?
A) 1.732 
B) 3.807 
C) 1.269 
D) 0.141

Quizplus · Accepted Answer

The standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation means that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation means that the values are spread out over a wider range. Given the context, option C (1.269) suggests a relatively low level of dispersion around the mean, which is typical for standardized measurements in a homogenous group like students in the same class or grade. Options A (1.732) and B (3.807) indicate higher variability, which might not be as common for such a group, and D (0.141) suggests an extremely low variability, which is less likely in practical scenarios involving human measurements. Without specific data or output provided in the question, the selection of option C is based on a general understanding of standard deviation values in educational and psychological measurements.

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