A 90% confidence interval for a proportion is found to be (0.37, 0.43). What is the sample proportions?

0.40

Explanation:

The following can be gotten from the question given:

Sample proportion - margin of error = 0.37

Sample proportion + margin of error = 0.43

Therefore, the sample proportion will.be the average of the values given above and this will be:

= (0.37 + 0.43)/2

= 0.80/2

= 0.40

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