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Normal Distribution
Page 7
Questions (2,042)
6) The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 88 inches, and a
4 answers
asked by
Anonymous
2,710 views
A brewery's filling machine is adjusted to fill bottles with a mean of 31.5 oz. of ale and a variance of 0.003. Periodically, a
4 answers
asked by
Tom 6
1,230 views
Find the area under the standard normal distribution curve for the following z-values:
a. Between z= 0 and z = 2.01 b. Between z
4 answers
asked by
Luna
1,535 views
In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a standard deviation of 5.
4 answers
asked by
StudentD
2,311 views
IQ scores are normally distributed with a mean u = 100 and a standard deviation o =15. Based on distribution, determine
% of IQ
4 answers
asked by
Dianne
3,512 views
The weights of steers in a herd are distributed normally. The standard deviation is 200 lbs and the mean steer weight is 1200
3 answers
asked by
Anonymous
1,832 views
9. Assume the weight, W, of a randomly selected adult has a normal distribution with a mean
of 175 pounds and a standard
4 answers
asked by
Josh
1,031 views
Find the (two) z-scores that bound the middle 40% of the standard normal distribution. please show the work.
3 answers
asked by
tina
1,337 views
A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys
4 answers
asked by
jackie
2,613 views
The number of customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of
3 answers
asked by
Tony
3,297 views
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 360 grams and a standard
1 answer
asked by
Shon
1,414 views
The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a standard deviation of $500.
a.
4 answers
asked by
V
1,377 views
Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that
3 answers
asked by
Jean
1,768 views
At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 24
3 answers
asked by
Daniela
343 views
Jason took his Siberian Husky dog to the veterinarian. The dog was put on a scale and found to weigh 52 lb. Assume that the
6 answers
asked by
jessica
725 views
The total area under the normal distribution curve is equal to a probability of
3 answers
asked by
Anonymous
2,402 views
Let X denote the time in hours needed to locate and correct a problem in the software that governs the timing of traffic lights
4 answers
asked by
Aryaa
1,751 views
find area of indicated region under the standard normal curve
the numbers are -.45 and 2.11 its shaded more towards the right i
4 answers
asked by
feather
2,359 views
7. a factory has a machine that makes steel rods. The length of the rods that the machine makes follows a normal distribution
4 answers
asked by
cait
2,356 views
Hi, I am having a lot of trouble with Normal Distribution. I do online school and this lesson didn't really explain how to
3 answers
asked by
anon
938 views
TThe probability that an observation, following a normal distribution, will lie within μ ± 1.3σ is
a. 9.5 % b. 19.0% c. 40.3%
1 answer
asked by
xalane
431 views
An instructor in a large lecture class found at the end of the semester that total points scored by students in his class was
3 answers
asked by
Tara
1,211 views
The time it takes to install the new telephone is found to be normally distributed with the mean of x minutes and a standard
3 answers
asked anonymously
40 views
Find the value of a if: P(Z < a) = 0.0359
3 answers
asked anonymously
23 views
The life of an electric light bulb is known to be normally distributed with a mean of 2000 hours and a std. of 120 hours. Find
4 answers
asked by
Heidi
1,241 views
The weight of certain population of young females is approximately normally distributed with the mean of 66 kg and a standard
3 answers
asked anonymously
47 views
Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 28 Minutes and a standard
3 answers
asked by
Rontheman
3,703 views
The weight of certain population of young females is approximately normally distributed with the mean of 66 kg and a standard
3 answers
asked anonymously
44 views
The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a standard deviation of 1.2 oz.
4 answers
asked by
olivo
3,639 views
Suppose x has a normal distribution with mean μ = 35 and standard deviation σ = 9.
(a) Describe the distribution of x values
3 answers
asked by
larae
1,109 views
The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated
4 answers
asked by
B
4,553 views
As reported in Runner's World magazine, the times of the finishers in the new york 10 km run are normally distrubted with a mean
4 answers
asked by
Anonymous
1,767 views
The breaking strengths (say, y) for one foot square samples of a particular synthetic fabric are approximately normally
3 answers
asked by
Taylor
1,604 views
A vending machine is designed to dispense a mean of 7.6 oz of coffee into an 8-oz cup. If the standard deviation of the amount
3 answers
asked by
vinnie
1,071 views
A normal distribution has a mean of 36 and standard deviation of 4. What proportion of the
distribution consisted of scores
3 answers
asked by
Robbie
599 views
A set of data is normally distributed with a mean of 200 and standard deviation of 50.
• What would be the standard score for a
3 answers
asked by
Dawn
596 views
Suppose an automobile association reports that the average time it takes to respond to an emergency call is 25 minutes. Assume
3 answers
asked by
Renita
873 views
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 166 and a variance of 4.
4 answers
asked by
Anna Swain
407 views
I'm kinda stuck on my math homework, does anyone know how to do it?
The results of a blood test at a medical lab are normally
3 answers
asked by
Andy
1,749 views
Under what circumstances does the sampling distribution of the proportion approximately follow the normal distribution?
3 answers
asked by
Dan
1,783 views
Why might the following not be normally distributed? (a) The time it takes you to drive to the airport, (b) The annual income
4 answers
asked by
Anonymous
514 views
Which of the following statements are correct?
a. A normal distribution is any distribution that is not unusual. b. The graph of
4 answers
asked by
Michelle
4,624 views
This is a word problem. "We know that for certain workers the mean wage is $5/hr with a standard deviation of $.50. We need to
4 answers
asked by
Tiffany Johnson
1,358 views
Evan earned a score of 610 on Exam A that had a mean of 650 and a standard deviation of 40. He is about to take Exam B that has
3 answers
asked by
Daniela
426 views
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.5 years, and standard deviation of
3 answers
asked by
peniis
386 views
A normal distribution has mean of 7 and standard deviation of 4. What is the raw score of X corresponding to z= -1.25?
3 answers
asked by
Joylyn nebres
778 views
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a random
3 answers
asked by
beyonce
1,370 views
find the indicated IQ score. The graph depicts IQ scores of adults, and those scores are normally distributed with a mean of 100
4 answers
asked by
ashley
2,178 views
The mean of a normal probability distribution is 440; the standard deviation is 8.
A: About 95% of the observations lie between
3 answers
asked by
Latina
1,505 views
Assume the mean height of soldiers to be 68.22 inches with a variance of 10.8 inches. How many soldiers in a regiment of 1000
2 answers
asked by
Ruhi
804 views
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Parent Categories (44)
Basic Concepts
Confidence Interval
Confidence intervals
Continuous Distributions
Continuous Probability Distributions
Data Analysis
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Distribution
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Distribution of Data
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Frequency distribution
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Hypothesis Testing
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Measures of Central Tendency and Dispersion
Population and Sampling
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Probability and Distribution
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Probability and Statistics
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