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# Is you interval spread indicating that the confidence interval used by the study is larger or smaller than 95%?

Is you interval spread indicating that the confidence interval used by the study is larger or smaller than 95%?

Sample size = 2,020 Margin of error = ± 2.6

The overall percentages show that 69% of the people surveyed approve and 24% disapprove and 4% are unsure or have no answer.

The confidence interval for each result is found by adding/subtracting the MoE from the result.

In favor: (69-2.6%, 69+2.6%) = (67.206, 70.794)

N = 2020

Number of successes = 69% of 2020 = .69*2020 = 1393.8 rounded to 1394 people

Confidence Level = 95%

Confidence Interval is (0.6699, 0.713)

March 14-25, 2018. N=2,020 adults nationwide. Margin of error ± 2.6.

Form 1, N=1,014

3/14-25/18

Safe practices,

birth control 67 %

Abstinence 24%

Neither/

Both (vol.) 6 %

Unsure/

Refused 3 %

Form 2, N=1,006

3/14-25/18

Safe practices,birth control 69 %

Abstinence 24 %

Neither/

Both (vol.)4%

Unsure 3 %

3/14-25/18

Legal in all cases 21%

Legal in most cases 33%

Illegal in most cases 29%

Illegal in all cases 14%

Unsure/ Refused 3%

1/28 - 2/24/13

23

33

24

14

5

If the given interval uses the margin of error of 2.6... View the full answer

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