Answer:
Option C is correct.
f = 2
Step-by-step explanation:
The mean is the sum of variables divided by the number of variables
Mean = (Σfx)/(Σf)
xi | 15 | 17 | 20 | 30 | 10 + f
fi | 4 | 4 | 6 | 5 | 6
Σfx = (15×4) + (17×4) + (20×6) + (30×5) + [(10+f)×6] = 60 + 68 + 120 + 150 + 60 + 6f = (458 + 6f)
Σf = 4 + 4 + 6 + 5 + 6 = 25
Mean = 18.8
18.8 = (458+6f) ÷ 25
458 + 6f = 25 × 18.8 = 470
6f = 470 - 458 = 12
f = (12/6) = 2
Hope this Helps!!!
The predicted strength is an illustration of a linear regression
The predicted strength of a weld with a diameter of 51 is -503.2
<h3>How to determine the predicted strength?</h3>
The equation of the predicted strength is given as:
Strength = -941.6992 + 8.5988*Diameter
Substitute 51 for diameter
Strength = -941.6992 + 8.5988*51
Evaluate the sum
Strength = -503.1604
Approximate
Strength = -503.2
Hence, the predicted strength of a weld with a diameter of 51 is -503.2
Read more about linear regressions at:
brainly.com/question/17844286
Answer:
1
Step-by-step explanation:
C = (9,2) & D = (-7,-9)
x₁ = 9 x₂ = -7
∴
= 1
Answer:
1 - 2 1/4
2 - 2 2/4 (simplified) 2 1/2
3 - 7 3/11
4 - 2 1/7
5 - 7 3/8
6 - 4 3/10
7 - 6 2/8 (simplified) 6 1/4
8 - 6 10/12 (simplified) 6 5/6
9 - 6 2/4 (simplified) 6 1/2
10 - 4 1/2
11 - 5 1/8
12 - 3 2/3
13 - 6 5/12
14 - 2 3/5
15 - 5 2/3
_______________________________________
1 - 42/5
2 - 20/3
3 - 27/5
4 - 52/7
5 - 10/3
6 - 17/3
7 - 40/11
8 - 28/5
9 - 29/3
10 - 25/3
11 - 86/9
12 - 11/3
13 - 15/2
14 - 5/2
15 - 38/7
