A computed 99% confidence interval for the true difference between two populatio

Question

A computed 99% confidence interval for the true difference between two population proportions is -0.025 to +0.109. Then at 99% confidence level,

we can conclude that there is a significant difference between the two population proportions.

Based on this result, we can not make a meaningful statement about the difference between the two population proportions.

we can conclude that the first population proportion is more than the second population proportion.

we can not conclude that there is a significant difference between the two population proportions.

we can conclude that there is a significant difference between the two population proportions.

Based on this result, we can not make a meaningful statement about the difference between the two population proportions.

we can conclude that the first population proportion is more than the second population proportion.

we can not conclude that there is a significant difference between the two population proportions.

Explanation / Answer

The  true difference between two population proportions is -0.025 to +0.109 is just the confidence interval

Hence, A and C are out.

D is the right answer. We cannot say that there difference is significant.

We have to find the Z value for the difference in proportions. After doing so, we have to compare it to .005 ( as we do to negate /accept the null hypothesis)

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