Please help me with this ty
2 answers:
Answer:
42
Explanation:
When finding the area of a triangle, the first step is to multiply the length times the width, in this case- 7 and 12
. 7 × 12 equals 84. The next step in finding the area would be to cut the product in half, in this case- the product is 84, so you would do 84 ÷ 2. And 84 ÷ 2 is 42, hence the answer would be 42
.
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Answer:
The point estimate for the proportion is p = 0.4725
The 95% confidence interval for the proportion of non-fatal accidents that involved the use of a cell phone is (0.4236, 0.5214).
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:
Point estimate
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 for the proportion of non-fatal accidents that involved the use of a cell phone is (0.4236, 0.5214).