### Home > CCA2 > Chapter 11 > Lesson 11.2.2 > Problem11-52

11-52.

A survey of $80$ seniors at Algieres High School found that $65\%$ had been accepted to a four-year university. A computer simulation was conducted and the proportions sorted to determine the sample-to-sample variability:

 Proportion of students accepted to a four-year university (sorted). Simulation mean $0.65$. $0.51$ $0.52$ $0.54$ $0.54$ $0.56$ $0.60$ $0.61$ $0.61$ $0.61$ $0.61$ $0.63$ $0.63$ $0.63$ $0.63$ $0.63$ $0.66$ $0.66$ $0.66$ $0.67$ $0.67$ $0.69$ $0.70$ $0.70$ $0.71$ $0.71$ $0.56$ $0.56$ $0.57$ $0.57$ $0.58$ $0.61$ $0.62$ $0.62$ $0.62$ $0.62$ $0.64$ $0.64$ $0.64$ $0.64$ $0.65$ $0.67$ $0.67$ $0.67$ $0.67$ $0.67$ $0.71$ $0.71$ $0.71$ $0.71$ $0.72$ $0.58$ $0.59$ $0.59$ $0.59$ $0.59$ $0.62$ $0.62$ $0.62$ $0.62$ $0.62$ $0.65$ $0.65$ $0.65$ $0.65$ $0.65$ $0.67$ $0.67$ $0.68$ $0.68$ $0.68$ $0.73$ $0.73$ $0.73$ $0.73$ $0.74$ $0.59$ $0.59$ $0.59$ $0.60$ $0.60$ $0.62$ $0.63$ $0.63$ $0.63$ $0.63$ $0.65$ $0.65$ $0.65$ $0.65$ $0.66$ $0.68$ $0.68$ $0.68$ $0.69$ $0.69$ $0.74$ $0.75$ $0.76$ $0.76$ $0.77$ checksum $64.64$
1. Use the technique of problem 11-27 to find the upper and lower $5\%$ bounds of the sample-to-sample variability.

The simulation was run $100$ times.
Which results represent the $5$th and $95$th percentiles?

2. Predict the proportion of the seniors at Algieres High that have been accepted to four-year universities and give the margin of error.

The mean (center) is $65\%$.
Acceptance rates can be expected to be in the range of your answers to part (a).
Express this as $65\%\pm x\%$.