Answer:
69
Step-by-step explanation:
term = 159 - 3n
Answer: 6x^4 - 15x^3 + 27x^2
Combine like terms. Then multiply the result by 3x^2
Work:
Answer:
300G
Step-by-step explanation:
Here is the complete question
A wedding cake weighed 8kg. If 2/5th of its weight was flour, 5/16th was sugar,1/4th was cream and the rest were nuts, find the weight of nuts.
fraction of the cake that was nuts = 1 - (2/5 + 5/16 + 1/4)
1 - 
= 3/80
wight of nuts = 3/80 x 8 = 0.3 kg = 300g
Answer:
What is meant by "bias due to selective survival" in cross-sectional studies?
First lets understand what is selective bias in cross-sectional studies. Basically its the bias that occurs when the random sample data for some analysis is selected in improperly. Such a selected sample is not able to represent the population that is to be analyzed. The reason is the improper randomization. So "bias due to selective survival" means that only the survival participants or survivors can be considered in this cross sectional studies. So if there is more probability of exposed cases to survive than unexposed cases or it could also be possible that unexposed cases have more probability to survive than exposed ones, so in either case the conclusion drawn from this cross sectional studies may differ from the proper cohort study. So the selective bias is introduced. Hence we can say that there is bias due to selective survival.
Step-by-step explanation:
Under what circumstances might there be no selective survival bias even if the selection probabilities are not all equal?
If the cross product of selection probabilities equals 1. Then there might be no selective survival bias even if the selection probabilities are not all equal. As we know that the cross product of odd ratio of selection probabilities is 1 means there is no relation between exposure and consequence or outcome and there is no bias in odd ratio.
Suppose that you could assess that the direction of possible selective survival bias in your study was towards the null. If your study data yielded a non-statistically significant odds ratio of 1.04, would it be correct to conclude that there was no exposure-disease association in your source population?
It would not be correct to conclude that there was no exposure-disease association in your source population because if the possible selective survival bias in the study was towards the null then this implies that the true odds ratio would be larger than 1.04. and therefore likely to be large and also differ statistically for the null value.
Looking at h and k values.
The vertex of a parabola ( h, k) is the point at which the parabola intersects the axis of symmetry.
Every parabola is symmetric about its axis, which means that if it were folded along its axis, the two parts would match. The fold or line that divides the parabola into two matching halves is called the axis of symmetry.
The axis of symmetry occurs at x = h.
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