An escarpment (or scarp) is a type of cliff, formed by the movement of a geologic fault or a landslide. Most cliffs have some form of scree slope at their base. In arid areas or under high cliffs, they are generally exposed jumbles of fallen rock. In areas of higher moisture, a soil slope may obscure the talus.
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Question. The life in hours of a 75-watt light bulb is known to be normally distributed with sigma=25 hours. A random sample of 20 bulbs has a mean life of X-bar=1014 hours.a) construct a 95% two-sided confidence interval on the mean life.uestion. The life in hours of a 75-watt light bulb is known to be normally distributed with sigma=25 hours. A random sample of 20 bulbs has a mean life of X-bar=1014 hours.