Question

1.the following confidence interval is obtained for a population proportion, p: 0.336 < p < 0.376

use these confidence interval limits to find the point estimate, p

a.0.336

b.0.361

c.0.356

d.0.351

Answer 1

Confidence interval in terms of proportion and margin of error E is represented as

- E < p < + E

Comparing this confidence interval with 0.336 < p < 0.376 , we get,

- E = 0.336 and + E = 0.376

Add these two equations we get,

- E + + E = 0.336 + 0.376

2 = 0.712

= 0.356

Point estimate of p = = 0.356