A random sample of 400 CLU students is taken. 395 students reported that Econ 311 was their favorite class. Calculate the margin of error for a 96% confidence interval.

The margin of error for a 96% confidence interval is of 0.0114 = 1.14%.

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 .

The margin of error is given by:

For this problem, we have that:

96% confidence level

So , z is the value of Z that has a pvalue of , so .

Calculate the margin of error for a 96% confidence interval.

The margin of error for a 96% confidence interval is of 0.0114 = 1.14%.

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hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb