Question: Although bats are not known for their eyesight they are

Although bats are not known for their eyesight, they are able to locate prey (mainly insects) by emitting high-pitched sounds and listening for echoes. A paper appearing in Animal Behaviour (“The Echolocation of Flying Insects by Bats” [1960]: 141– 154) gave the following distances (in centimeters) at which a bat first detected a nearby insect:
a. Compute the sample mean distance at which the bat first detects an insect.
b. Compute the sample variance and standard deviation for this data set. Interpret these values.

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