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lara [203]
2 years ago
5

Consider the multiple regression model with two regressors X1 and X2, where both variables are determinants of the dependent var

iable Y. You first regress Y on X1 and find no relationship. However, while regressing Y on X1 and X2 the slope coefficient of the variable X1 changes by a large amount. This suggests that your first regression suffers from:
A. Perfect multicollinearity
B. Dummy variable trap
C. Omitted variable bias
D. Heteroskedasticity
Mathematics
1 answer:
charle [14.2K]2 years ago
4 0

Answer:

<em>C. Omitted variable bias </em>

Step-by-step explanation:

In mathematics and statistics, omitted-variable bias (OVB) happens if one or more important variables is left out by a statistical model.

The bias results in the equation being related to the expected effects of the included variables by the influence of the excluded variables.

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Write the equation of a line with a slope of 7 and a y-intercept of -3. Put the equation in slope-intercept form.
Rina8888 [55]

Answer:

y=7x-3

Step-by-step explanation:

y=mx+b

m is the slope, so replace m with 7

b is the t-intercept so replace b with the -3.

7 0
3 years ago
Which function has an inverse that is also a function? B9X) = x^2+3 d(x) = -9 m(x) = -7x P(x) = X
ohaa [14]
B(x) has an inverse that is also a function.
7 0
3 years ago
Find a cubic function f(x) = ax3 + bx2 + cx + d that has a local maximum value of 4 at x = −3 and a local minimum value of 0 at
Vinvika [58]
The formula is f(x) = a x ^ 3 + b x ^ 2 + c x  + d 
f '(x) = 3ax^2 + 2bx + c. 
f(- 3) = 3 ==> - 27a + 9b - 3c + d = 3 
f '(- 3) = 0 (being a most extreme) ==> 27a - 6b + c = 0. 
f(1) = 0 ==> a + b + c + d = 0 
f '(1) = 0 (being a base) ==> 3a + 2b + c = 0. 
- 
Along these lines, we have the four conditions 
- 27a + 9b - 3c + d = 3 
a + b + c + d = 0 
27a - 6b + c = 0 
3a + 2b + c = 0 
Subtracting the last two conditions yields 24a - 8b = 0 ==> b = 3a. 
Along these lines, the last condition yields 3a + 6a + c = 0 ==> c = - 9a. 
Consequently, we have from the initial two conditions: 
- 27a + 9(3a) - 3(- 9a) + d = 3 ==> 27a + d = 3 
a + 3a - 9a + d = 0 ==> d = 5a. 
Along these lines, a = 3/32 and d = 15/32. 
==> b = 9/32 and c = - 27/32. 
That is, f(x) = (1/32)(3x^3 + 9x^2 - 27x + 15).
8 0
3 years ago
Julio bought 12 bulbs of jumbo garlic for $11.88. How many bulbs of jumbo garlic can Anjali buy if she has $3.96?
Molodets [167]

Answer:

Anjali can buy 4 bulbs of jumbo garlic if she has $3.96.

Step-by-step explanation:

To calculate how many bulbs of jumbo garlic Anjali can buy with $3.96, we must first calculate the unit rate of the jumbo garlic. Julio buying 12 bulbs of jumbo garlic for $11.88 can be represented as:

\frac{11.88}{12}

Divide the fraction by \frac{12}{12} to calculate the unit rate:

\frac{.99cents}{1bulb}

So if each bulb of garlic costs $0.99, which we can think of as being $1.00 at the moment, we could figure that Anjali's $3.96 would be closer to $4 than it is to $3, so let's multiply the unit rate by \frac{4}{4}:

\frac{.99}{1} × \frac{4}{4}=

\frac{3.96}{4}

Therefore, Anjali can buy 4 bulbs of jumbo garlic if she has $3.96.

_

Check your work by dividing \frac{3.96}{4} by \frac{4}{4} to see if you will get your initial unit rate:

\frac{3.96}{4} ÷ \frac{4}{4} =

\frac{0.99}{1}

Therefore, our solution is correct!

7 0
2 years ago
Read 2 more answers
A cereal box is 12 cm tall.the area of a base is 7cm square.what is the volume​
n200080 [17]

The volume = Base × height = 12× 7 = 84 Cm³

6 0
2 years ago
Read 2 more answers
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