The Following Characteristics of Disks Make Them Convenient for Being

question 2

Multiple Choice

The following characteristics of disks make them convenient for being the secondary storage:

• A) it is possible to read a block from the disk, modify the block, and write it back into the same place
• B) a disk can access directly any block of information it contains
• C) all of the above
• D) none of the above

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Definitions:

Degree of Freedom

In statistics, it refers to the number of values in the final calculation of a statistic that are free to vary.

Group Means

The average values obtained from the data points of each group or category under examination in a study.

Statistical Significance

Indicating that the observed results are unlikely to occur by chance alone, according to a predetermined threshold of probability.

Null Hypothesis

The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.