Sampling and hypothesis testing

Is the age of this very old man statistically believable?

How can you time the reaction timer?

How would you massage the data in this Chi-squared test to both accept and reject the hypothesis?

What's the chance of a pair of lists of numbers having sample correlation exactly equal to zero?

Typical survey sample sizes are about 1000 people. Why is this?

"Too much sleep is deadly" proclaimed the newspaper headline. Is this true?

How effective are hypothesis tests at showing that our null hypothesis is wrong?

Some short statements about hypothesis testing: are they true, false, or somewhere in between?

I need a figure for the fish population in a lake. How does it help to catch and mark 40 fish?

What information helped medical pioneers decide on the cause of a disease? Especially in a time before microscopes were as powerful as they are today ?