Answer:
Following are the solution to this question:
Step-by-step explanation:
Please find the complete question and its solution file in the attachment.
Depreciate- to lose value over time
it loses 15% over one year meaning that it retains 85% of its value from the previous year<span>.
2003-2013= 10 years
71,000 * (0</span>.85^10yrs)= $13,978<span>.</span>08
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Answer:
Radius=9
Diameter=18
Step-by-step explanation:
Answer:
The 95% confidence interval on the true proportion of helmets of this type that would show damage from this test is (0.169, 0.397).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
For this problem, we have that:

95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:

The upper limit of this interval is:

The 95% confidence interval on the true proportion of helmets of this type that would show damage from this test is (0.169, 0.397).