THIS ONE IS URGENT FOR A TEST PLEASE HELP!
2 answers:
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Answer:
given statement is false
Step-by-step explanation:
given data
first time = 100 minutes
fourth time = 81 minutes
solution
as here time for 1st unit is multiply by learning percentage for obtain time for 2nd unit
so here time for 2nd unit divide by time of 1st unit so 100 is here learning curve
so × 100 = 81 percent
but it say 90 percent learning curve
so given statement is false
Answer:
a) 15.4% probability that a randomly selected person in this country is 65 or older
b) 0.023 = 2.3% probability that the person is 65 or older
Step-by-step explanation:
To solve b), i will use the Bayes Theorem.
Bayes Theorem:
Two events, A and B.
In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.
(a) What is the probability that a randomly selected person in this country is 65 or older?
22.7% of people in the county are under age 18
61.9% are ages 18–64
p% are 65 or older.
The sum of those is 100%. So
22.7 + 61.9 + p = 100
p = 100 - (22.7+61.9)
p = 15.4
15.4% probability that a randomly selected person in this country is 65 or older.
(b) Given that a person in this country is uninsured, what is the probability that the person is 65 or older?
Event A: Uninsured
Event B: 65 or older.
15.4% probability that a randomly selected person in this country is 65 or older.
This means that
1.4% of those 65 and older do not have health insurance.
This means that
Probability of not having insurance.
22.7% are under 18. Of those, 5.4% do not have insurance.
61.9% are aged 18-64. Of those, 12.8% do not have insurance.
15.4% are 65 or over. Of those, 1.4% do not have health insurance. So
Then
0.023 = 2.3% probability that the person is 65 or older