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Advocard [28]
2 years ago
6

PLEASEEE HELP MEEEE!!

Mathematics
2 answers:
Sidana [21]2 years ago
5 0
The answer is B i took the practice test and got it right :)
MrRa [10]2 years ago
5 0

Hello!

the answer is C! ( y=\frac{1}{3} x-6 )

hope that helps!<3 have a good day!:))

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An article reports the following data on yield (y), mean temperature over the period between date of coming into hops and date o
skelet666 [1.2K]

Answer:

x1=c(16.7,17.4,18.4,16.8,18.9,17.1,17.3,18.2,21.3,21.2,20.7,18.5)

x2=c(30,42,47,47,43,41,48,44,43,50,56,60)

y=c(210,110,103,103,91,76,73,70,68,53,45,31)

mod=lm(y~x1+x2)

summary(mod)

R output: Call:

lm(formula = y ~ x1 + x2)

Residuals:  

   Min      1Q Median      3Q     Max

-41.730 -12.174   0.791 12.374 40.093

Coefficients:

        Estimate Std. Error t value Pr(>|t|)    

(Intercept) 415.113     82.517   5.031 0.000709 ***  

x1            -6.593      4.859 -1.357 0.207913    

x2            -4.504      1.071 -4.204 0.002292 **  

---  

Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1  

Residual standard error: 24.45 on 9 degrees of freedom  

Multiple R-squared: 0.768,     Adjusted R-squared: 0.7164  

F-statistic: 14.9 on 2 and 9 DF, p-value: 0.001395

a).  y=415.113 +(-6.593)x1 +(-4.504)x2

b). s=24.45

c).  y =415.113 +(-6.593)*21.3 +(-4.504)*43 =81.0101

residual =68-81.0101 = -13.0101

d). F=14.9

P=0.0014

There is convincing evidence at least one of the explanatory variables is significant predictor of the response.

e).  newdata=data.frame(x1=21.3, x2=43)

# confidence interval

predict(mod, newdata, interval="confidence")

#prediction interval

predict(mod, newdata, interval="predict")

confidence interval

> predict(mod, newdata, interval="confidence",level=.95)

      fit      lwr      upr

1 81.03364 43.52379 118.5435

95% CI = (43.52, 118.54)

f).  #prediction interval

> predict(mod, newdata, interval="predict",level=.95)

      fit      lwr      upr

1 81.03364 14.19586 147.8714

95% PI=(14.20, 147.87)

g).  No, there is not evidence this factor is significant. It should be dropped from the model.

4 0
2 years ago
The length and breadth of rectangular room is 10 cm and 5 cm. Find the area of perimeter​
julsineya [31]

Answer:

P= 30 cm

Step-by-step explanation:

Formula for Rectangle Perimeter P=2(l+w)

P=2(10+5)

P=2(15)

P=30

3 0
2 years ago
Write 7.5% as a fraction in lowest terms
denis-greek [22]
I believe the answer would be 3/40
3 0
3 years ago
What is 1/3 of 1/9 of a ton?<br><br> Make sure your answer is fully reduced
natulia [17]

Answer:

0.03703703703

Step-by-step explanation:

6 0
3 years ago
An internet company charges $8.95 per month for the first 3 months that it hosts your Web site. Then the company charges $11.95
ira [324]

Answer:

$86.60

Step-by-step explanation:

1. Subtract 8-3=5

2. Multiply 3*8.95=$26.85

3. Multiply 5*11.95=$59.75

4. Add $26.85+$59.75=$86.60

7 0
3 years ago
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