snake

Snakes deposit chemical trails as they travel. These trails are detected by lizards. Seventeen juvenile lizards were exposed to the chemical cues of the viper snake. Their responses in number of tongue flicks per 20 minutes are shown below. Assume the population standard deviation, σx, is 190.
425, 510, 629, 236, 654, 200, 276, 501, 811, 332, 424, 674, 676, 694, 710, 662, 633