James researched gas prices for the last 3 years (as shown in the table below). Based on your line of best fit, what will be the
price of gas 50 years from now? (Hint: year 53)
A. $12.75
B. $14.23
C. $15.42
D. $17.99
A. $12.75
B. $14.23
C. $15.42
D. $17.99
1 answer:
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Answer:
The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).
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 for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).