The larger the level of confidence, the shorter the confidence interval. True or false

If we change a 90% confidence interval estimate to a 95% confidence interval estimate,the width of the confidence interval will _____

In a survey conducted on an SRS of 200 American adults, 72% of them said they believed in aliens. Give a 95% confidence interval for percent of American adults who believe in aliens.

In a survey of 100 adults, 91 of them said that they trusted DNA testing.a. What is p , the sample proportion of adults who trust DNA testing?b. Find and interpret the 98% confidence interval for the proportion of adults that trust DNA testing.