Answer:




Step-by-step explanation:
Provided
4, 17, 12, 9, 6, 10, 1, 5, 9, 3
Calculating the range;

From the data provided;
The highest value is 17 and the lowest is 1
Thus;


Calculating the inter-quartile range
The inter-quartile range (IQR) is computed as follows

Where
Q3 = Upper Quartile and Q1 = Lower Quartile
Start by sorting the data in ascending order
1, 3, 4, 5, 6, 9, 9, 10, 12, 17
N = Total data points; N = 10
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Calculating Q3

Substituting 10 for N


Expressing 8.25 as 8 + 0.25

Converting 0.25 into fractions


From the ordered dataset;
and








Calculating Q1
Substituting 10 for N

Expressing 2.75 as 2 + 0.75




Converting 0.75 into fractions


From the arranged dataset;
and 







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Remember that



Calculating Variance
Begin by determining the mean



Then subtract the mean from each value and square the differences










Sum up the squared results

Then divide that sum by the total number of observations;


Calculating Standard Deviation (SD)


(Approximated)