Eli is driving at a speed of 55 mph. Let h represent the number of hours of hours that Eli drives at the speed. Write an algebra
2 answers:
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Answer:
At least 547 records need to be studied.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence interval
, we have the following confidence interval of proportions.
In which
Z is the zscore that has a pvalue of .
And the margin of error is:
95% confidence interval
So , z is the value of Z that has a pvalue of
, so
.
In this problem, we have that:
At least 547 records need to be studied.