Teacher resources and professional development across the curriculum
Teacher professional development and classroom resources across the curriculum
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Random Sampling and Estimation
Article defines random sampling and gives examples of good and bad samples.
What Is a Random Sample?
What's Blood Got to
Do with It?
A person suffering from appendicitis has significantly more white blood cells than normal. To discover your white blood count, do the doctors drain out all your blood and count the cells? Of course not! They prick your finger with a needle, remove a drop of your blood, place it under a microscope and count the white blood cells. If there are twice as many white blood cells in that drop of blood than is normal, the doctors can predict that the white blood cell count is higher than normal throughout all your blood.
Being Certain It's
is inspired by programs from Against All Odds: Inside Statistics,
a video series in the Annenberg Media Multimedia Collection.