Answer:
Range = 29
Variance= (X₁- U) ² / N= 973/10 = 97.3
Standard Deviation= √variance= √97.3= 9.864
Step-by-step explanation:
Range = Difference between the highest and lowest value = 97-68= 29
Variance
X₁ X₁-U (X₁- U) ²
80 0 zero
68 -12 144
71 -9 81
72 -8 64
95 15 225
89 9 81
97 17 289
72 -8 64
75 -5 25
81 1 1
∑ 800 ZERO 973
u= ∑X₁ /10=800/10=80
Variance= (X₁- U) ² / N= 973/10 = 97.3
Standard Deviation= √variance= √97.3= 9.864
(b) The important feature of the data is not revealed through the different measures of variation is that the variability of two or more than two sets of data cannot be compared unless a relative measure of dispersion is used .
Answer:
The Original length of uncut String is of 120 cm.
Step-by-step explanation:
Let the length of original string be x.
Length of bracelet = 18 cm.
The necklace uses 50% of the string
Hence length of necklace will be equal to 50% of the string.
Length of necklace = 
The anklet is 60% shorter than the necklace.
Length of anklet will be equal to difference of Length of necklace and 60% of the Length of necklace.
Length of anklet = 
The bracelet needs 25% less string than the anklet.
Length of bracelet will be equal to difference of Length of anklet and 25% of the Length of anklet.
Length of bracelet = 
But Length of Bracelet = 18 cm

Hence Total original Length of Uncut String is 120 cm.
Answer:
85
Step-by-step explanation:
90(4) = 75 + 95 + 2x
360 = 170 + 2x
2x = 360 - 170
2x = 190
x = 85
Answer: 20
Step-by-step explanation:
Answer:
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Step-by-step explanation:
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