A nation-wide delivery company would like to estimate the proportion of packages that were delivered on time last month. To do so, they select a random sample of 120 packages that were delivered last month and examine tracking information to determine if they were delivered on time. They find that 87.5% of these packages were delivered on time. Construct and interpret a 95% confidence interval for the proportion of all packages that this company delivered on time last month.

STATE:
95% CI for

= the
proportion
of
the sample of
packages that were delivered on time last month.

PLAN: Select 3 true statements.

We have a random sample of 120 packages that were delivered last month

The sample size, 120, is less than 10% of all packages delivered last month.

The Random condition is not met.

One-sample interval for

The 10% condition is not met.

One-sample interval for