Question

1- The average is a way to characterize a collection of values. When the values refer to a fixed item (for example the number of oranges per tree) and we want to find the average number of oranges, the _______________ mean is appropriate.

2- The ___________________________ mean is used when we want to preserve the effect on the mean of a percentage change in a value independent of the values magnitude.

3- The word size of the IAS  computer (remember one instruction word contains the left and right instructions) is ________ bits.

Answer 1

SOLUTION:

1) The average is a way to characterize a collection of values. When the values refer to a fixed item (for example the number of oranges per tree) and we want to find the average number of oranges, the arithmetic    mean is appropriate.

Arithmetic Mean:

The arithmetic mean is most commonly used average. It is generally referred as the average or simply mean.

Therefore, the mean for the values X₁, X₂, X₃,……….., X_n shall be denoted by

2) The standard deviation mean is used when we want to preserve the effect on the mean of a percentage change in a value independent of the values magnitude.

The standard deviation measure variability and consistency of the sample or population. In most real-world applications, consistency is a great advantage. In statistical data analysis, less variation is often better.

3) The word size of the IAS  computer (remember one instruction word contains the left and right instructions) is 40 bits.

The IAS machine was a binary computer with a 40-bit word, storing two 20-bit instructions in each word.

The memory was 1,024 words (5.1 kilobytes).

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