Answer:
a) 0.2416
b) 0.4172
c) 0.0253
Step-by-step explanation:
Since the result of the test should be independent of the time , then the that the test number of times that test proves correct is independent of the days the river is correct .
denoting event a A=the test proves correct and B=the river is polluted
a) the test indicates pollution when
- the river is polluted and the test is correct
- the river is not polluted and the test fails
then
P(test indicates pollution)= P(A)*P(B)+ (1-P(A))*(1-P(B)) = 0.12*0.84+0.88*0.16 = 0.2416
b) according to Bayes
P(A∩B)= P(A/B)*P(B) → P(A/B)=P(A∩B)/P(B)
then
P(pollution exists/test indicates pollution)=P(A∩B)/P(B) = 0.84*0.12 / 0.2416 = 0.4172
c) since
P(test indicates no pollution)= P(A)*(1-P(B))+ (1-P(A))*P(B) = 0.84*0.88+ 0.16*0.12 = 0.7584
the rate of false positives is
P(river is polluted/test indicates no pollution) = 0.12*0.16 / 0.7584 = 0.0253
<span>1. An income statement has income and expenses.
Income statement records all the finances of an individual or an organization for a certain period of time.
2. The three-legged stool represents retirement savings.
Retirement savings is the process of putting aside some finances as savings for later part of life.
3. A 401-K is a type of retirement account.
This is an account that is set up by the employer to put aside an amount from salary before the tax deductions.
4. The easily accessible part of an emergency fund is savings.
This saving comes fetching at the time of the hour when there is need for it.
5. Working a second job helps meet savings goals can help you pay off debts quicker and fills in gaps in a budget. So we can simply say that having an extra income is always useful</span>
Multiply the GCF of the numerical part 3 and the GCF of the variable part x^2y to get
3x^2y.
<span><span><span><span>−<span>2<span>(<span>q−22</span>)</span></span></span>+q</span>+12</span>>0</span>
Step 1: Simplify both sides of the inequality.<span><span><span>
−q</span>+56</span>>0</span>
Step 2: Subtract 56 from both sides.<span><span><span><span>
−q</span>+56</span>−56</span>><span>0−56</span></span><span><span>
−q</span>><span>−56</span></span>
Step 3: Divide both sides by -1.<span><span><span>
−q</span><span>−1</span></span>><span><span>−56</span><span>−1</span></span></span><span>
q<56</span>
Answer: q<56
7 is the answer because 7 is great and is always the answer
