Question

A 95% confidence interval for the population proportion of k-12 students who do not have internet access at home is given by: 12% to 20%.

Consider this claim: The population proportion of k-12 students who do not have internet access at home is more than 15% .  

The confidence interval __________ the claim.

Group of answer choices

None of the other choices represent a suitable response.

tends to refute

tends to support

provides no strong evidence for or against the claim

Answer 1

A 95% confidence interval for the population proportion of k-12 students who do not have internet access at home is given by: 12% to 20%.

Consider this claim: The population proportion of k-12 students who do not have internet access at home is more than 15% .  

The confidence interval  tends to refute the claim.

As 15% is within the 95% confidence interal for the population proportion of k-12 students who do not have internet access at home as 12% < 15% < 20%; Which refutes the claim that ; The population proportion of k-12 students who do not have internet access at home is more than 15% .  

If Lower confidence limit > 15% : then confidence interval tends to support the claim; but in the given case ;

12% : Lower confidence limit < 15% ; Hence refutes the claim.