Concepts
function in calculator when you are given the area and need to find the cutoff.
what is invNorm?
Assume the mean net gain in a casino game is $0 and standard deviation of the net gain is $1. Also assume the net gains are normally distributed. If one randomly selects a person who played the game, what is the probability that he has a net gain of more than $0?
.50
The weights of the eggs produced by a certain breed of hen are normally distributed with a mean of 65 grams and standard deviation of 5 grams. Find the probability that one egg selected at random from a hen house will weigh more than 68 grams.
.2743
The weights of the eggs produced by a certain breed of hen are normally distributed with a mean of 65 grams and standard deviation of 5 grams. Find the probability that the average weight of half a dozen eggs is between 50 and 63 grams.
.1638
function in calculator when you are given the cutoff and need to find the area.
what is normalcdf?
Assume the mean net gain in a casino game is $0 and standard deviation of the net gain is $1. Also assume the net gains are normally distributed. If one randomly selects a person who played the game, what is the probability that she takes home less than $3.25?
.9994
The weights of the eggs produced by a certain breed of hen are normally distributed with a mean of 65 grams and standard deviation of 5 grams. Find the probability that one egg selected at random will weigh less than 55 grams.
.0228
Assume that women’s heights are normally distributed with a mean of 63.5 inches and a standard deviation of 2.6 inches. If 30 women are randomly selected, find the probability that they have a mean height greater than 65 inches.
.0001
area is related to _____.
what is probability?
Assume the mean net gain in a casino game is $0 and standard deviation of the net gain is $1. Also assume the net gains are normally distributed. If one randomly selects a person who played the game, what is the probability that he takes home more than $2.30?
.0107
The Wechsler Adult Intelligence Scale has a mean score of 100, a standard deviation of 15 and is normally distributed. What score would mark the top 12% of scores?
117.6248
The wingspans of a common species of housefly are normally distributed with a mean of 15mm and a standard deviation of 0.5mm. Find the probability that the wingspan of 20 houseflies is less than 14.25mm.
.0000
total area under the curve.
what is equal to 1?
Assume the mean net gain in a casino game is $0 and standard deviation of the net gain is $1. Also assume the net gains are normally distributed. If one randomly selects a person who played the game, what is the probability that she has a net gain between $2.24 and $4.31?
.0125
Books in the library are found to have an average length of 350 pages with standard deviation of 100 pages. What amount of pages would mark the bottom 5.2% of pages in a book?
187.4287
The average teacher's salary in New Jersey is $52,174. Suppose that the distribution is normal with standard deviation $7500. If we sample 100 teachers' salaries, what is the probability that the sample mean is less than $50,000 per year?
.0019