Using the information given, it is found that:
a) 0.39
b) z = 1.96
c) s = 0.0218
d) M = 0.0428
e)
- The lower bound is 0.3472.
- The upper bound is 0.4328.
f) The 95% confidence interval is (0.3472, 0.4328), which means that we are 95% sure that the true proportion of boats who are in violation of one or more safety regulations is (0.3472, 0.4328).
Item a:
The point estimate is the sample proportion, hence:
Item b:
95% confidence level, hence , the critical value z is the value of Z that has a p-value of , so .
Item c:
The standard error is:
For this problem, , hence:
Item d:
The margin of error is:
In this problem, , hence:
Item e:
The lower bound is:
The upper bound is:
The lower bound is 0.3472.
The upper bound is 0.4328.
Item f:
The 95% confidence interval is (0.3472, 0.4328), which means that we are 95% sure that the true proportion of boats who are in violation of one or more safety regulations is (0.3472, 0.4328).
A similar problem is given at brainly.com/question/15136737
Step-by-step explanation:
A
because degree is power.. so the expression with power of 8 is A
for B, the power is 6
for C the power is 9
and D the power is 2
Using a geometric sequence, it is found that:
a) The explicit formula is: .
b) The value of her collection 9 years after she started tracking is of $94,557,148.
<h3>What is a geometric sequence?</h3>
A geometric sequence is a sequence in which the result of the division of consecutive terms is always the same, called common ratio q.
The nth term of a geometric sequence is given by:
In which is the first term.
Item a:
Three years ago, her collection was worth $250,000, hence the first term is .
In two years, the collection was valued at $1,102,500, hence the common ratio is:
.
Hence, the explicit formula is:
Item b:
The value of her collection 9 years after she started tracking is of $94,557,148.
More can be learned about geometric sequences at brainly.com/question/11847927
Answer:
x - 12
Step-by-step explanation:
Let the number be x:
x - 12