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evablogger [386]
3 years ago
12

The temperature in a chemical reactor was measured every half hour under the same conditions. The results were 78.1°C, 79.2°C, 7

8,9°C, 80.2°C, 78.3°C, 78.8°C. 79.4°C.
the mean ?​
Mathematics
1 answer:
gladu [14]3 years ago
3 0

Answer:

72.2

Step-by-step explanation:

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X + 16 = 25 What is the value of x?
Paraphin [41]

Answer:

x = 9

Step-by-step explanation:

Isolate x first by moving 16 to the other side

x = 25 - 16

x = 9

5 0
3 years ago
You are considering developing a regression equation relating a dependent variable to two independent variables. One of the vari
lys-0071 [83]

Answer:

Step-by-step explanation:

a. How many dummy variables are needed to represent the categorical variable?

We need 1 less dummy variable than outcomes for the categorical variable.

categorical variable has 2 outcomes

So, we need 2-1 = 1 dummy variable.

Answer: 1

Note: If our categorical variable had 5 outcomes, we would need 5-1 = 4 dummy variables.

b. Write the multiple regression equation relating the dependent variable to the independent variables.

Note: Depending your your professor, this can be written one of the following ways...

yhat = a + b1 x1 + bx2

yhat = b0 + b1 x1 + b2 x2

yhat = beta0hat + beta1hat x1 + betahat2 x2

where x1 is the ratio variable

and x2 is the dummy variable

c. Interpret the meaning of the coefficients in the regression equation.

b0 = the predicted value of y when x1 and x2 both equal 0.

b1 = the change in y when x1 increases by 1 unit holding x2 constant.

b2 = the predicted difference in y between the two possible outcomes of the categorical variable holding x1 constant.

7 0
3 years ago
Select the THREE situations that could be represented by the product of two numbers equal to -20
Cerrena [4.2K]

Answer:

it might be 3 one according to me

8 0
2 years ago
An airplane on autopilot took 8 hours to travel 5,760 kilometers. What is the Unit rate for kilometers per hour.
weqwewe [10]
The answer for the 2nd one is c ur welcome btw idk what 1 is sry
5 0
3 years ago
Which of the following is the correct factorization of -y²+y+6?
SpyIntel [72]

Answer:

<h2>(−y−2)(y−3)</h2>

Step-by-step explanation:

I'm just going to factor it for you.

Factor −y^2+y+6

−y^2+y+6

=(−y−2)(y−3)

Answer:

(−y−2)(y−3)

6 0
2 years ago
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