Answer : If a child's hyperactivity rating is predicted to be 18, he <u>consumed 103.125 grams</u> of food containing preservatives.
The regression (least-squares) equation given in the question is:

In the equation above, y is the predicted variable. Here the predicted variable is the subjective hyperactivity rating (on a scale of 1 to 20).
The independent variable, x, is the quantity of food containing preservatives (in grams) consumed by hyperactive children.
The question tells us that the subjective hyperactivity rating of a child is 18.
Substituting the value of y in the equation above, we have,



Question: The question is incomplete. See the full question below and the answer.
You are an up-and-coming developer in downtown Seattle and are interested in constructing a building on a site you own. You have collected four bids from prospective contractors. The bids include both a cost ($millions) and time to completion (months):
Contractor Cost Time
A 100 20
B 80 25
C 79 28
D 82 26
The problem now is to decide which contractor to choose. B has indicated that for another $20 million, he could do the job in 18 months, and you have said that you would be indifferent between that bid and the original proposal. In talking with C, you have indicated that you would just as soon pay her an extra $million if she could get the job done in 26 months. Who gets the job? Explain your reasoning. (It may be convenient to plot the four alternatives on a graph.)
Answer:
See the explanation for the answer and find attached of the graph.
Explanation:
So we draw a regression line of Time vs Cost and best fit a curve based on the data given, given in the above figure. The four alternatives are marked in the figure as well. Our main objective is to reduce both time and cost, but that might not be possible So the best thing would be to look for alternatives which lie below the line. If C gets an extra million, then that point would come below the regression line, and it would be a better alternative than D, because for the same time we are getting the job done at a cheaper cost.
Also if B is paid extra 20 million, that point also comes below the regression line, and hence will be a better alternative than A because for the same cost again we are getting the job done earlier. We need to choose between B and C. Now in order to optimise both cost and time, we need to choose a point close to the middle point of the regression line segment in 1st quadrant. We see that C is much more closer to the middle point and hence seems like a better option.
So we choose C as our contractor if we consider B's alternative bid, but if we do not consider B's alternative bid and stick to the original one, we choose B as our contractor.
Answer:
Experiential Learning Theory
Explanation:
I think that the experiential learning theory is the most effective learning theory. This learning theory projects experience as a crucial factor that promotes learning. It also explains that people learn better when they initiate their learning and not when they are forced to learn.
I think this theory is very effective as it makes the lessons learned to stick better and also cause the needed changes. For example, a teenager who is constantly reminded by his parents to avoid late night partying, but rejects the counsel, might learn better if he gets into trouble as a result of the experience. Also, a student who finds it difficult to understand a topic taught by a teacher, might get better at it when he initiates the learning himself by actively researching and studying on his own.
Answer:
Variable-interval
Explanation:
she is likely to be reinforced with positive responses to her inquiries on a variable-interval schedule.
Variable-interval schedule is a schedule of reinforcement where a response is recompensed after an uncertain amount of time has passed, which is the opposite of a fixed-interval schedule.