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Normal Distribution
Page 9
Questions (2,066)
Fluctuation in the prices of precious metals such as gold have been empirically shown to be well approximated by a normal
3 answers
asked by
SEMALAW
523 views
The weights of pineapples grown are approximately normally distributed with a standard deviation of 2.5 and mean of 31 ounces.
1 answer
asked by
James
1,391 views
The MPG for a certain compact car is normally distributed with a mean of 31 and a standard deviation of 0.8. what is the
3 answers
asked by
Nate
1,192 views
In a certain microwave oven on the high power setting, the time it takes a randomly chosen kernel
of popcorn to pop is normally
3 answers
asked by
Andrew
1,365 views
For a normal distribution, identify the z-score location that would separate the distribution into sections so that there is:
a)6
3 answers
asked by
Anonymous
1,367 views
The mean incubation time for a type of fertilized egg kept at a certain temperature is 21 days suppose that the incubation times
3 answers
asked by
Wanda
131 views
If the height of 200 students is normally distributed with mean of 65 inches & std deviation 3.5 inches. How many students have
3 answers
asked by
Anonymous
191 views
1. A set of test scores is normally distributed with a mean of 76 points and a standard deviation of 8 points. Round your
3 answers
asked by
bee
517 views
Find the area under the standard normal curve which lies between z = +1.25
and z = +2.11
3 answers
asked by
dave
535 views
All the houses in Stanton County have a mean size of 1,650 square feet with a standard deviation of 320. Assume the distribution
3 answers
asked by
jessica
788 views
Assume that the weights of men are normally distributed with a mean of 182.9 pounds and a standard deviation of 40.8 pounds.
3 answers
asked by
c.c.
497 views
In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal
3 answers
asked by
debra
423 views
The tensile strength of paper used to make grocery bags is an important quality characteristic. It is known that the strength is
3 answers
asked by
matt
1,099 views
Use the table to answer each question. Note: Round z-scores to the nearest hundredth and then find the required A values using
3 answers
asked by
rose
586 views
An electronic product takes an average of 9 hours to move through an assembly line. If the standard deviation is 0.7 hours, what
3 answers
asked by
van
320 views
Assume that the height of a type of tree has a normal probability distribution with a mean of 55.2 ft and a standard deviation
1 answer
asked by
van
313 views
An economics exam is worth 60 points and is taken by 500 students. the scores on the exam are normally distributed with the
3 answers
asked by
David
437 views
The mean one-way commute to work is 25.8 minutes. The longest one-way travel time is in New York City, where the mean time is
3 answers
asked by
Latina
726 views
Solve the problem. Round to the nearest tenth unless indicated otherwise. The weights of certain machine components are normally
3 answers
asked by
maczindahouse
1,348 views
In a certain country the heights of adult men are normally distributed with a mean of 69.4 inches and a standard deviation of
3 answers
asked by
Brendora
1,332 views
The annual salaries of all employees at a financial company are normally distributed with a mean = $34,000 and a standard
3 answers
asked by
suzanne
1,936 views
A milk company unconditionally guarantees that an unopened, properly refrigerated container of its milk will be fresh for 5 days
3 answers
asked by
Sally
693 views
If the student ratings of the overall effectiveness of professors is normally distributed with a mean of 5 and a standard
2 answers
asked by
Chandler
918 views
The weights of ice cream cartons produced by a manufacturer are normally distributed with a mean weight of 10 ounces and a
2 answers
asked by
Joe
1,200 views
The average U.S. yearly capita consumption of citrus fruit is 26.8 pounds. Suppose that the distribution of fruit amounts
3 answers
asked by
Marnee
1,822 views
Assume that the mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation
3 answers
asked by
Anonymous
1,423 views
The heights of 200 kindergarten students are normally distributed with a mean of 40 and a standard deviation of 1.8 inches.
4 answers
asked by
Dee
2,080 views
Please help me, I have know idea how to do this and the assignment is due today!
A manufacturer is producing metal rods, whose
5 answers
asked by
Mandy
918 views
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, use the
3 answers
asked by
angela
877 views
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.25 inches and a standard
3 answers
asked by
angela
1,125 views
Weights of women are normally distributed with mean 143 pounds and standard deviation 29 pounds. If 36 women are randomly
3 answers
asked by
anon
1,079 views
A machine for filling 2-liter bottles of soft drink delivers an amount to each bottle that varies from bottle to bottle
3 answers
asked by
kuhel
1,564 views
The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the
3 answers
asked by
Anonymous
1,105 views
the life span of an electric bulb is normally distribution with mean 5500 light hours and standard deviation of 1200 light hours
3 answers
asked by
ragul
761 views
A machine fills 12 ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be
3 answers
asked by
Sally
1,946 views
The height of a tree will be measured using a clinometer. For this device, the measurement error has a normal distribution with
3 answers
asked by
Emily
648 views
Find the z scores that separate the middle 59% of the distribution from the area in the tails of the standard normal
3 answers
asked by
bee
2,518 views
A survey among freshman at a certain university revealed that the number of hours spent studying the week before final exams was
3 answers
asked by
Tommy
1,261 views
When Mrs. Myles gave a test, the scores were normally distributed with a mean of 72 and a standard deviation of 8. This means
3 answers
asked by
Jake
1,164 views
A camera store sells 40 pairs of binoculars per week on average with a standard deviation of 6. What is the probability that the
3 answers
asked by
Anonymous
477 views
suppose that prices of a certain model of new homes are normally distributed with a mean of $150,000 use the rule to find the
3 answers
asked by
john
1,770 views
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and
4 answers
asked by
slomomo
2,483 views
The average age of doctors in certain hospital is 43 years old. Suppose distribution of ages is normal and the standard
4 answers
asked by
stuart joel
891 views
Daily water intake (including water used in drinks such as coffee, tea and juice) for Canadian adults follows a normal
4 answers
asked by
Mel
675 views
X is a normally distributed random variable X with mean 15 and standard deviation 0.25. Find the values xL and xR of X that are
4 answers
asked by
Anonymous
1,313 views
the weights of newborn babies are distributed normally, with the mean of approximately 115 oz and a standard deviation of 20 oz.
3 answers
asked by
michelle
1,688 views
5. A soft drink dispensing machine uses paper cups that hold a maximum of 12 ounces. The machine is set to dispense a mean of 10
4 answers
asked by
Sarah
1,647 views
In this question, use Excel functions rather than Normal distribution tables.
The number of new cars sold by "Ma's New Car
4 answers
asked by
Sylvia
2,140 views
Scores on a test are normally distributed with a mean of 75 and a standard deviation of 8. Estimate the probability that a
4 answers
asked by
clara
2,226 views
Scores for men on the verbal portion of the SAT-I test are normally distributed with a mean of 509 and a standard deviation of
3 answers
asked by
TJ
896 views
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Parent Categories (44)
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