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KIM [24]
3 years ago
14

Which of the following statements are true? Select all that apply

Mathematics
1 answer:
Murrr4er [49]3 years ago
4 0
A,C,D is as an answer
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The efficiency for a steel specimen immersed in a phosphating tank is the weight of the phosphate coating divided by the metal l
34kurt

Answer:

Kindly check explanation

Step-by-step explanation:

Given the data:

Temp. 174 176 177 178 178 179 180 181

Ratio 0.86 1.31 1.42 1.01 1.15 1.02 1.00 1.74

Temp. 184 184 184 184 184 185 185 186

Ratio 1.43 1.70 1.57 2.13 2.25 0.76 1.37 0.94

Temp. 186 186 186 188 188 189 190 192

Ratio 1.85 2.02 2.64 1.53 2.48 2.90 1.79 3.16

A)

Using the online linear regression calculator, the lie of best fit which models the data above is :

ŷ = 0.09386X - 15.55523

Where ;

X = independent variable

ŷ = predicted or dependent variable

- 15.55523 = intercept

0.09386 = gradient / slope

B)

Point estimate when tank temperature is 186

ŷ = 0.09386(186) - 15.55523

ŷ = 17.45796 - 15.55523

ŷ = 1.90273

C)

Residual error (y - ŷ), ŷ = 1.90273 when x = 186

(0.94 - 1.90273) = −0.96273

(1.85 - 1.90273) = −0.05273

(2.02 - 1.90273) = 0.11727

(2.64 - 1.90273) = 0.73727

D)

To determine the proportion of observed variation in efficiency ratio, we find the Coefficient of determination R^2, which can be found using the online Coefficient of determination calculator : the r^2 value obtained is 0.4433.

5 0
2 years ago
The officers of a high school senior class are planning to rent buses and vans for a class trip. Each bus can transport 63 ​stud
sp2606 [1]
Min Cost = $12,200
Number of buses needed = 7
Number of vans needed = 24
8 0
3 years ago
Yesterday Cindy did 1/9 of her homework. Today she did
8090 [49]

Answer:

2/9

Step-by-step explanation:

Hope this helps! <3

6 0
2 years ago
Read 2 more answers
If 2a - 8 = 4 and 3b - 8 = 10, what is the value of a + b?
barxatty [35]
A+B=22 is your answer
7 0
3 years ago
John is hiking in the San Juan National Forest. Every 4 hours his elevation increases between 140 and 210 feet. 36 hours ago, Jo
Ksju [112]

Answer D. It is the closets answer to my calculations so im sorry if im wrong

8 0
2 years ago
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