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Normal Distribution
Page 8
Questions (2,066)
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
780 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
2,179 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
805 views
The playing time X of classical CDs has the normal distribution with mean 54 and standard deviation 5; the N(54, 5)
3 answers
asked by
Jasel
2,425 views
The weights of cereal boxes was found to be normally distributed. The mean is 16 oz and the standard deviation is 0.5 oz. From a
4 answers
asked by
faith
1,316 views
scores on a University exam are normally distributed with a mean of 68 and a standard deviation of 9. use the 68-95-99.7 rule to
3 answers
asked by
kayla
1,572 views
Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to
3 answers
asked by
vanessa
2,668 views
A particular fruit's weights are normally distributed, with a mean of 764 grams and a standard deviation of 33 grams.
The
3 answers
asked by
Bailey
5,882 views
Across the USA, results for these exams are normally distributed. What does that mean and why is this the case?
If you were to
3 answers
asked by
Natasha
2,304 views
A normal distribution has a mean of 44 and a standard deviation of 4.
What is the probability that a value drawn from the
3 answers
asked by
Mark
1,002 views
Assume that women’s heights are normally distributed with a mean given by μ = 63.4 in, and a standard deviation given by σ =
4 answers
asked by
slomomo
2,748 views
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of
3 answers
asked by
Michael
1,290 views
in 2000 the average charge of tax preparation was $95. assuming a normal distribution and a standard deviation of $10. What
3 answers
asked by
tolendoy
803 views
the average number of passengers on a subway car is 60. If the number of passengers on a car has normal distribution with a
3 answers
asked by
aso
1,187 views
what is the proportion of students with a raw score less than 10? if information was collected from fellow students the rating
4 answers
asked by
Precious
1,540 views
The life span of a calculator has a normal distribution with a mean of 60 months and a standard deviation of 5 months. If a
3 answers
asked by
Heidi
1,231 views
Listed below is a simple random sample of sitting eye heights (in mm) of men (based on anthropometric survey data from Gordon,
3 answers
asked by
Bell
439 views
An accelerated life test on a large number of type-D alkaline batteries revealed that the mean life for a particular use before
7 answers
asked by
Ryan
1,855 views
The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The
4 answers
asked by
Shawn
1,660 views
X is normally dsitributed with mean 250 and standard deviation 40. what value of X does only top 15% exceed?
3 answers
asked by
Anonymous
814 views
assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes
2 answers
asked by
jessica
1,125 views
The length of Paulo’s lunch break follows a normal distribution with mean μ minutes and standard
deviation 5 minutes. On one
3 answers
asked by
sanjay
2,613 views
assume that adults have I.Q scores that are normally distributed with a mean of 100 and a standard deviation 15. find p2 which
3 answers
asked by
andrea
671 views
Assume that it takes a college student an average of 5 minutes to find a parking spot in the main parking lot. Assume also that
2 answers
asked by
Anonymous
913 views
Assume that human body temperature are
normally distributed with a mean 98.21 F and a standard deviation of 0.61F a)A hospital
4 answers
asked by
angela
1,537 views
According to Advertising Age, the average base salary for women working as copywriters is $66,000. Assume that the salaries are
3 answers
asked by
petrit
1,420 views
The customer bills in a family restaurant are normally distributed. The bills mean is $28 and has a standard deviation of $6.
a.
3 answers
asked by
James
2,876 views
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and
4 answers
asked by
Jana
1,927 views
Given a population of scores is normally distributed with mu of 110 and a standard deviation of 8 the percentage of scores that
3 answers
asked by
Debra
696 views
Assuming that the heights of college women are normally distributed with mean 66 inches and standard deviation 2 inches, what
3 answers
asked by
RainbowGlitter
2,338 views
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 410 grams and a standard
3 answers
asked by
MD
3,710 views
Assume the weights of men are normally distributed having a mean of 185 lbs and a standard deviation of 17 pounds.
A. Calculate
3 answers
asked by
Bill
1,509 views
The IQ scores are normally distributed with a mean of 100 and a SD of 15.
A) What is the probability that a randomly person has
3 answers
asked by
Sandy
1,274 views
A normal distribution has µ = 80 and standard deviation = 10. What is the probability of randomly selecting a score greater
3 answers
asked by
shauna
938 views
In a normal distribution with mu = 25 and sigma = 3, what number corresponds to z = -3?
is it 16, 18, or 20
1 answer
asked by
Katie
383 views
the masses of lettuces sold at a market stall are normally distributed with the mean 600g and standard deviation 20g.
1) find the
3 answers
asked by
harish
826 views
On the daily run of an express bus, the average number of passengers is 48. The standard deviation is 3. Assume the variable is
4 answers
asked by
Darryle
2,185 views
Assume that women's heights are normally distributed with a mean=63.6 in. and standard deviation = 2.5 in.
a) To be eligible for
3 answers
asked by
jimmy
1,381 views
The weight of a product is normally distributed with a mean of 4 ounces and a variance of .25 "sq ounces." The company wants to
4 answers
asked by
Isabella
1,782 views
The actual weights of bag of pet food are normally distributed.The mean of the weights is 50.0 lb,with a standard deviation of
2 answers
asked by
Anonymous
1,250 views
Assume the aptitude test score are normally distributed; mean is 140 points and standard deviation is 25 points. Within what
3 answers
asked by
Anonymous
470 views
If only the upper 30% of a normally distributed class passed a quiz for which the mean was 70 and the standard deviation was 10,
4 answers
asked by
Cody Morris
1,221 views
On standard IQ tests, the mean is 100 and the standard deviation is 16. The results are very close to fitting a normal curve.
3 answers
asked by
Anonymous
689 views
The fracture strength of a certain type of manufactured glass is normally distributed with a mean of
579 MPa with a standard
2 answers
asked by
Mary Ann
866 views
the admissions policy at a certain university requires that incoming students score in the upper 20% on a standardized test. if
4 answers
asked by
Anonymous
1,704 views
A business uses a 7-point scale about satisfaction with the services it provides to clients. The ratings are normally
3 answers
asked by
Sarah
595 views
In an intelligence test administered to 1000 childrens the average score is 42 and standard deviation 24.find (i)the number
4 answers
asked by
noopur
1,360 views
A charity believes that when it puts out an appeal for charitable donations the donations it receives will normally distributed
3 answers
asked by
Probability
760 views
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