Вправа 1248 алгебра Бевз гдз 7 клас

№ 1248
Find the greatest and the lowest values of the sample and sample mean:
a) $12 ; 17 ; 11 ; 13 ; 14 ; 15 ; 16 ; 13 ; 13$.
b) 0,95 ; 0,99 ; 1,03 ; 1,06 ; 0,97 ; 0,97 ; 1,0 ; 1,01 ; 0,98 ; 0,97 ; 0,99; 0,96; 1,02; 0,97; 1,0.

a) Sample: $$
12,17,11,13,14,15,16,13,13
$$ 1. Greatest value:
The largest number in the sample is $\mathbf{1 7}$.
2. Lowest value:
The smallest number in the sample is 11 .
3. Sample mean:
The sample mean is calculated as: $$
\text { Mean }=\frac{\text { Sum of all values }}{\text { Number of values }}
$$ Sum of all values: $$
12+17+11+13+14+15+16+13+13=124
$$ Number of values: 9 .
Mean: $$
\text { Mean }=\frac{124}{9} \approx 13.78
$$
b) Sample: $$
0.95,0.99,1.03,1.06,0.97,0.97,1.00,1.01,0.98,0.97,0.99,0.96,1.02,0.97,1.00
$$ 1. Greatest value:
The largest number in the sample is 1.06 .
2. Lowest value:
The smallest number in the sample is 0.95 .
3. Sample mean:
Sum of all values: $$
0.95+0.99+1.03+1.06+0.97+0.97+1.00+1.01+0.98+0.97+0.99+0.96+1.02+0.97+1.00=14.78
$$ Number of values: 15 .
Mean: $$
\text { Mean }=\frac{14.78}{15} \approx 0.985
$$ Відповідь:
• Найбільше: 1,06,
• Найменше: 0,95,
• Середнє: 0,985.