Suppose That the Amount of Time Teenagers Spend on the Internet

question 107

Essay

Suppose that the amount of time teenagers spend on the Internet is normally distributed, with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean is computed as 6.5 hours.
Determine the 95% confidence interval estimate of the population mean. Interpret

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Definitions:

Tetrapod

A tetrapod is a vertebrate with four limbs (or, like snakes, descended from vertebrates with four limbs). Living tetrapods include mammals, birds, reptiles, and amphibians.

Physeter macrocephalus

The scientific name for the sperm whale, a large marine mammal known for its deep diving capability and large brain.

Tiktaalik

An extinct genus of fish-like tetrapods that provides insight into the evolutionary transition from water to land animals.

Synapomorphy

A characteristic or feature that is shared by two or more taxa and is presumed to have been present in their most recent common ancestor, used in establishing evolutionary relationships.