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Normal Distribution
Page 2
Questions (2,066)
A normal distribution has a mean of 120 and a standard deviation of 20. What range of scores would form the middle 60%?
3 answers
asked by
Anonymous
929 views
a) The average height of sunflowers in a field is 64 inches with a standard deviation of 3.5 inches. Describe a normal curve for
4 answers
asked by
Kelly
1,232 views
Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our
4 answers
asked by
Jaz
840 views
Find the area under the standard normal curve between z = 0 and z = 1.45.
5 answers
asked by
Anonymous
1,557 views
A survey of mobile call interconnectivity indicates that the average time it takes to connect calls from one network to the
1 answer
asked by
Ruby
460 views
The weight of a product is normally distributed with a standard deviation of .8 ounces. What should the average weight be if the
3 answers
asked by
Beverley
930 views
The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1200 hours and a standard
1 answer
asked anonymously
28 views
Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.11
and a standard deviation of 1.46 .
1 answer
asked anonymously
36 views
prove that area under normal distribution curve is 1
1 answer
asked anonymously
14 views
Betty’s Bite-Size Candies are packaged in bags. The number of candies per bag is normally distributed, with a mean of 50
1 answer
asked anonymously
34 views
Consider P(X >10)=0.9983 where it is given that Xis distributed toN (mean ;25). Determine mean
1 answer
asked anonymously
9 views
which of the following percentages accurately estimates the area under a normal curve between a z-score of -0.11 and 2.43
1 answer
asked anonymously
7 views
The scores on the Advanced Algebra final exam are approximately normally distributed with a mean of 150 and a standard deviation
1 answer
asked anonymously
10 views
the scores on the Advanced Algebra final exam are approximately normally distributed with a mean of 150 and a standard deviation
1 answer
asked anonymously
12 views
Let X and Y be independent normal random variables.
a) Is 2X−4 always normal? b) Is 3X−4Y always normal? c) Is X^2+Y always
5 answers
asked by
Muhammad
1,908 views
Let X and Y be two normal random variables, with means 0 and 3 , respectively, and variances 1 and 16 , respectively. Find the
4 answers
asked by
Adam
4,603 views
The average age of doctors in a certain hospital is 50.0 years old. Suppose the distribution of ages is normal and has a
4 answers
asked by
giovanny
3,510 views
Gani, a regular coffee drinker, goes to his favorite coffee shop every night for a cup of hot cappuccino. The amount of time
5 answers
asked by
Angel
914 views
The time taken by a man to deliver milk is normally distributed with, mean 12 minutes and standard deviation 2 minutes. He
4 answers
asked by
Heidi
1,699 views
Let U, V, and W be independent standard normal random variables (that is, independent normal random variables, each with mean 0
6 answers
asked by
A
2,112 views
The breaking strength of cable is known to be normally distributtes with a mean of 4000 kg and a standard deviation of 25 kg.The
4 answers
asked by
Jhon
1,469 views
The incomes of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation $150. What
4 answers
asked by
J.T.
5,943 views
The arnual per capita consumption of bottied water was 34.4 gallons. Assume that the per copita consumption of bottled water is
2 answers
asked anonymously
186 views
e survey found that men's heights are normally distributed with a mean of 67.2 inches and a standard deviation of 3.1 inches.
2 answers
asked anonymously
176 views
The height of adult males on a given South Pacific Island is approximately normally distributed with mean 63 inches and standard
2 answers
asked anonymously
163 views
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 139.1-cm and a standard
1 answer
asked by
van
344 views
Suppose x is random variable with normal distribution (u,sigma^2) distribution and p(x<=0)=1/3 and p(x<=1)=2/3 what are the
7 answers
asked by
Star
847 views
How do you use normal density function fomulae show with 2 examples?
2 answers
asked anonymously
104 views
Suppose that the lifetime of a farm tractor follows a normal distribution with a mean of eight years and a standard deviation of
5 answers
asked by
Angel
1,344 views
the life span of a calculator manufactured by the intel corporation has a normal distribution with a mean of 54 months and a
2 answers
asked by
Shriya Sharma
781 views
1. Which of the following statements are correct?
a. A normal distribution is any distribution that is not unusual. b. The graph
1 answer
asked by
Jay
1,121 views
Company A packaged bolts in boxes that are normally distributed with a mean of 312 bolts and a standard deviation of 4.1 bolts.
1 answer
asked by
Cheri
100 views
The amount of cereal in a box is normally distributed with a mean of 24oz and a standard deviation of 0.72oz. If 17500 boxes of
2 answers
asked by
Cheri
142 views
An examination is normally distributed with a mean score of 77 and a deviation of 6. find the percent of individuals scoring as
2 answers
asked by
Ronni
1,274 views
At one college, GPA's are normally distributed with a mean of 2.7 and a standard deviation of 0.5. What percentage of students
4 answers
asked by
Irene
4,226 views
Suppose Y ∼ N(μ=0, σ). Find σ so that the normal population contains 90% of its probability between -1 and 1. Please round
3 answers
asked by
Help Please!!!
559 views
if heights of a group of girls are normally distributed with a mean of 66 inches . if 95% of the heights are between 63 inches
1 answer
asked anonymously
53 views
the graph shows a non standard normal distribution curve with a mean of 59.0 and a standard deviation of 6.7. Find the area of
5 answers
asked by
sid
5,433 views
Which of the following statements are TRUE about the Normal Distribution? Check all that apply.
a. The graph of the Normal
4 answers
asked by
bee
1,897 views
the monthly demand for a certain product is a normal random variable with a mean of 50 and standard deviation 10 a) if you have
2 answers
asked by
Joan
582 views
A regulation hockey puck must weigh between 5.5 and 6 ounces. In an alternative manufacturing process the mean weight of pucks
1 answer
asked by
kuhel
767 views
A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally
4 answers
asked by
Lyndse
1,660 views
What is the difference between normal distribution and approximate normally. Correct me if im wrong but I think the parameters
2 answers
asked by
Sarah
603 views
Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation
5 answers
asked by
Bob
901 views
If a distribution is mound-shaped and symmetric, what percent of homes will have a monthly bill of more than $115? The mean
2 answers
asked by
Sam
654 views
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and
distribution
3 answers
asked by
Anonymous
1,924 views
A sample of 3000 observations has a mean of 86 and a standard deviation of 13. The distribution is bell-shaped. Using the
2 answers
asked by
myself
723 views
The purchases made by customers at a convenience store are normally distributed, with a
mean of $5.50 and a standard deviation of
2 answers
asked by
Tanisha
526 views
Let x be a continuous random variable that follows a normal distribution with a mean of 200 and a standard deviation 25.
Find the
4 answers
asked by
louise
3,617 views
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We
3 answers
asked by
Mary Ann
1,836 views
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Parent Categories (44)
Basic Concepts
Confidence Interval
Confidence intervals
Continuous Distributions
Continuous Probability Distributions
Data Analysis
Data Analysis and Interpretation
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Data distribution
Data Distributions
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Distribution
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Distribution of Data
Distribution of Variables
Distributions
Educational Statistics
Frequency distribution
Frequency Distributions
Hypothesis Testing
Mathematics/Statistics
Measures of Central Tendency and Dispersion
Population and Sampling
Probability
Probability & Statistics
Probability and Distribution
Probability and Distributions
Probability and Statistics
Probability Calculations
Probability Distribution
Probability distributions
Probability Theory
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Sampling distribution
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