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Probability Distribution
Page 3
Questions (544)
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
4,556 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
1,768 views
1. The sociologist surveyed the households in a small town. The random variable X represents the number of dependent children in
3 answers
asked by
LadyJustice85
2,339 views
an experiment consists of 4 tosses of a coin.denoting the outcomes HHTH,THTT,..and assuming that all 16 outcomes are equally
3 answers
asked by
ali
755 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
515 views
Which of the following probability values would complete the following probability distribution? P (x) 0 1/8 1 3/8 3 2 k
3 answers
asked by
Anonymous
347 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
1,506 views
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
931 views
Among a random sample of 500 college students, the mean number of hours worked per week at non-college related jobs is 14.6.
6 answers
asked by
Lissa
1,714 views
Approximately 6% of the male population is color blind. If a random sample of 250 male adults is tested for color blindness,
3 answers
asked by
Dmitivch
689 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
1,291 views
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 270 hours and a standard deviation of
4 answers
asked by
Justice
1,935 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
2,615 views
suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of
4 answers
asked by
roy
2,582 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
1,421 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
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
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
1,784 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
Use the 68-95-99.7 rule to solve the problem. - The amount of Jen's monthly phone bill is normally distributed with a mean of
4 answers
asked by
Deb
1,465 views
For a fair coin tossed three times, the eight possible simple events are HHH, HHT, HTH, THH, HTT, THT, TTH, TTT. Let X = number
3 answers
asked by
Anonymous
2,463 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
1,366 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
Observations are drawn from a bell-shaped distribution with a mean of 35 and a standard deviation of 3.
a. Approximately what
2 answers
asked anonymously
64 views
72% of all bald eagles survive their first year of life. Give your answers as decimals, not percents. If 35 bald eagles are
1 answer
asked by
kiyu
335 views
The probability that a certain hockey team will win any given game is 0.3786 based on their 13 year win history of 393 wins out
3 answers
asked by
Anonymous
291 views
During the first year at a university that uses a four-point grading system, a freshman took ten three-credit courses and
3 answers
asked by
lijm
1,118 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
728 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
919 views
A candidate for public office has claimed that 60% of voters will vote for her. If 5 registered voters were sampled,
1. What is
3 answers
asked by
rania
1,014 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
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
Leatha
2,812 views
Let the random variable x represent the number of girls in a family with three children. Assume the probability of a child being
2 answers
asked by
slomomo
944 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
2,141 views
Who is the king of late night TV? An Internet survey estimates that, when given a choice between David Letterman and Jay Leno,
3 answers
asked by
Megan
974 views
a drinks machine dispenses coffee into cups. A sign on the machine indicates that each cup contains 50 ml of coffee. the machine
4 answers
asked by
latoya
1,202 views
An industrial engineer has found that the standard household light bulbs produced by a certain manufacturer have a useful life
3 answers
asked by
bappy
915 views
: Four cards are drawn without replacement from a well shuffled standard deck of cards. Let X be the number of aces drawn.
12.
3 answers
asked by
Janice
519 views
The weight of adult green sea urchins are normally distributed with a mean 52g and standard deviation 17.2g?
A. Find the
3 answers
asked by
Anonymous
2,060 views
Suppose that, in fact, the blood cholesterol level of all men aged 20 to 34 follows the normal distribution with mean of u = 188
3 answers
asked by
Zachovia
936 views
Suppose that a random variable, X, follows a Normal distribution. Specifically, X~N(10, 4).
What is the value for the standard
3 answers
asked by
Kat
1,020 views
For a hypothetical normal distribution of test scores, approximately 95% fall between 38 and 62, 2.5% are below 38, and 2.5% are
4 answers
asked by
StudentD
1,152 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
3 answers
asked by
Anonymous
1,316 views
suppose the replacement times for washing machines are normally distributed with mean 8.6 years and standard devistion of
3 answers
asked by
tara
773 views
Suppose that the birth weight of newborn babies in the U.S is normally distributed with a mean of 7 pounds and a standard
1 answer
asked by
Angel
1,120 views
Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random
2 answers
asked by
k
851 views
The Ace AirLines has a policy of overbooking flights. The random variable x represents the number of passengers who cannot be
3 answers
asked by
dee
458 views
Why might the following not be normally distributed? (a) The time it takes you to drive to the airport, (b) The annual income
3 answers
asked by
Anonymous
409 views
Professor Sanchez has been teaching Principles of Economics for over 25 years. He uses the following scale for grading.
Grade
3 answers
asked anonymously
59 views
A random variable X follows the continuous uniform distribution with a lower bound of −2 and an upper bound of 12.
a. What is
3 answers
asked anonymously
97 views
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