Math problem with results, page-222

I’m afraid I’m going to fail all the CI calculators.

Nequalsone – you have used the wrong figures for NPA; as well as for showing a CI below 75%.

TT – it’s the confidence interval for a proportion you want. And you produced a CI lower than 75% as well. A clopper-pearson exact CI is what you want.

TK – no you cannot calculate CIs from the data presented in the announcement. You need the Ns in the cells including the off diagonals.

To clear the confusion up perhaps TK can share his method for calculating CI and arriving at >75% from the data presented in the announcement.

What will be embarrassing is if its me that failed.