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Below is the list of all word problems we have on **normal distribution**.

- 30% of a firm`s orders come from new customers
*(#2641)*

30% of a firm's orders come from new customers. A simple random sample of 100 orders will be used to estimate the proportion of new customers. Find probability that sample proportion will be between 0.22 and 0...

- A normal distribution has a mean
*(#3515)*

A normal distribution has a mean of 80 and a standard deviation of 14...

- A reading program is administered
*(#2948)*

A reading program is administered to the bottom 5% of the students. If the average score of the students is 122.6, find the cutoff score that will make a student eligible to the ...

- At a fair, 37 pumpkins were entered for judging
*(#3489)*

At a fair, 37 pumpkins were entered for judging under the normal pumpkin division. If the masses are normally distributed and the average weight is 12.4 kg, with a standard deviation for 2.31 kg. What is the probability that a pumpkin has a mass between 13...

- Find the IQ score separating the top
*(#1404)*

Find the IQ score separating the top 85% from the ...

- In a class of 25 students
*(#2972)*

In a class of 25 students, the grades were normally distributed with a mean of 78 and a standard deviation of 5. Sketch the normal curve for the distribution. What percentage of the students scored above an 88...

- In France, years of life expectancy
*(#3345)*

In France, years of life expectancy are normally distributed with a mean of 81 years and a standard deviation fo seven years. For the French population:

a) What is the probability of living 92 years or ...

- Mean and standard deviation of house prices
*(#2618)*

Mean of $100,000 and a standard deviation of $35,000. What percentage of houses have prices between $90,000 and $130...

- Normal Distribution
*(#3577)*

for a specific year, american spent an average of $71.12 for books. Assume the variable is normally distributed.If the standard deviation of the amount spent on books is 8.42, find these probabliities for a normaly selected americans.

1. he or she spent more than $60 per year on books.

2...

- Normal Distribution
*(#5716)*

1. A normal distribution has a mean of 20 and a standard deviation of 4.

a) Find the percentile rank for a data value of 17 ( i....

- Normal Distribution
*(#5732)*

the amount of daily deposits and daily withdrawals are given by independent random variables withnormal distributions.For deposits,the mean is $12000 and standard deviation of 4000.For withdrawals the mean is $10000 and standard deviation is $5000.Find the probablity that on any particular day the with drawal is greater than deposits

- Normal Distribution
*(#6199)*

Population mean= 800 and standard deviation= 150; If you were to select a random sample of 500 students how many would you expect to have in your sample who spent $750 or less on clothing?

- Normal Distribution
*(#6326)*

the average age of lawyers is 40 years, with a standard deviation of 3 years. if a law firm employs 36 ...

- Normal Distribution
*(#7523)*

the mean yield a given year for sugar beets is 22 tons/acre and the standard deviation 3.8. For a sample of 280 fields, find the approximate number with a yield between 18.2 and 25.8. assume a normal distribution

- Normal Distribution
*(#8417)*

an almanac reports the average person uses 118 gallons of water daily. If the standard deviation is 24 gallons, find the probability that the mean of a randomly selected sample of 15 people will be between 116 and 120 gallons. Assume the variable is normally distributed. Round your answe to two decimals

- Test for high school students
*(#2909)*

Test for high school students with a 3.50 to 4.00 grade point average were normally distributed, with a mean of 38.8 and a standard diviation of 1.9. A student with a 3.5 to 4.00 grade point average who took the standarized tes is randomly ...

- The mayor of a small town estimates
*(#2432)*

The mayor of a small town estimates that 35% of the residents in his town favor the construction of a municipal parking lot. If there are 350 people at a town meeting, find the probability that at least 100 favor construction of a parking lot. Based on your ...

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