A random sample of 130 mortgages in the state of Maryland was randomly selected.From this sample,14 were found to be delinquent on their current payment.The 98% confidence interval for the proportion based on this sample is _______.
A) [0.063,0.153]
B) [0.036,0.180]
C) [0.029,0.188]
D) [0.015,0.201]

Question

Quizplus · Accepted Answer

The sample proportion is 14/130 = 0.1077. Using the formula for a confidence interval for a proportion and a Z-score for 98% confidence (approximately 2.33), the interval is calculated as [0.063, 0.153].

A Random Sample of 130 Mortgages in the State of Maryland