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Questions (838)
You are a travel agent and wish to estimate, with 95% confidence, the proportion of vacationers who plan to travel outside the
2 answers
asked by
Anonymous
929 views
A population has mean 53 and standard deviation 12. Calculate the mean of x bar for a random sample of size 10.
1 answer
asked by
Anonymous
478 views
in a random sample of 400 voter, 120 plan to vote for candidate A. determine a 95% confidence interval
2 answers
asked by
John
497 views
The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is
2 answers
asked by
melinda
1,139 views
consider the population of all students at your school. A certain portion support mandatory national service following high
1 answer
asked by
Anonymous
1,212 views
A sample of n-25 students is selected from a population with mu =100 with standard deviation of 20. On average, how much error
2 answers
asked by
Anonymous
1,191 views
Arandomly selected sample of a population for study is one in which:
1 answer
asked by
Sandra
263 views
you sample 100 women and the average mean is 16, Calculate 95% Confidence interval for the sample. Do you have evidence the true
3 answers
asked by
najuma
341 views
A researcher wishes to be 95% confident that her estimate of the population proportion of individuals who travel overseas is
3 answers
asked by
cm
1,872 views
The manager of Alco wants to establish the proportion of time that the stock clerks spend making price changes on previously
1 answer
asked by
Anonymous
394 views
suppose we wish to construct a confidence interval for a population proportion p. if we sample without replacement from a
2 answers
asked by
carl
596 views
If 55% of a television viewing population watched a program called ¡§Name that
Poem¡¨ one evening, what is the probability
1 answer
asked by
Nancy
1,143 views
Suppose that a random sample of n kernels of popcorn is taken and x of these kernels pop. The buyer wants to be 95% sure that
1 answer
asked by
Apryl
495 views
In the library on a university campus, there is a sign in the elevator that indicates a limit of 16 persons. Further more, there
3 answers
asked by
Jane
1,404 views
Historically, the proportion of adults over the age of 24 who smoke has been estimated to be .30. You want to take a sample to
1 answer
asked by
Tammy
462 views
A scientist samples a deer population and finds 200 deer in an area of 10 square miles. On average, how many deer can the
3 answers
asked anonymously
57 views
11. What are the implications of using a sample that is too big or a sample that is too small?
How big is big enough?
1 answer
asked by
Lindsey
280 views
With a population of 10,000 children (50% boys and 50% girls, 70% white and 30% nonwhite, and 57% single-parent family and 43%
4 answers
asked by
Lindsey
603 views
Do you or don't you want too few surveys because you won't have enough answers to support any generalizations or findings you
1 answer
asked by
Jazmyne
467 views
Tonya wants to estimate what proportion of the students in her dormitory like the dorm food. She interviews an SRS of 50 of the
3 answers
asked by
Manda
1,422 views
In order to qualify for federal job training funds, a neighborhood group must provide an estimate of the mean of education level
2 answers
asked by
MK
548 views
Determine the standard error of the mean if a random sample of 52 is pulled from a population with µ = 82 and ó = 18. Round
1 answer
asked by
Anonymous
295 views
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were
2 answers
asked by
Carmella
1,043 views
STATISTICS PLEASE HELP!!!!! I am sorry this is jy second time posting, but I really need help. I have tried contacting my
2 answers
asked by
Jake
558 views
Suppose cars arrive at Burger King's drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 pm. A random
1 answer
asked by
Emma
731 views
A personal trainer wants a random sample of her clients. She gets the list of all her clients from the gym manager and assigns
4 answers
asked by
Jill
398 views
How many simple random samples, SRS's, are possible of size 40 from a population of size 5000?
(express in scientific notation 4
1 answer
asked by
Sue
373 views
For a given month, a random sample of 30 sales girls from a superstore has a sample mean of salary of RM 800 with standard
4 answers
asked by
niki
518 views
A _____ is a smaller piece of the population that represents the entire population.
(1 point) Responses bias bias interval
3 answers
asked anonymously
61 views
What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual?
1 answer
asked by
Nicole
367 views
A population of 200 voters contains 52 Republicans, 128 Democrats, and 20 independents and members of other parties. A simple
1 answer
asked by
Sarah
428 views
The sampling distribution of x bar must be a normal distribution with a mean 0 and standard deviation 1. true or false
2 answers
asked by
CS
924 views
The standard deviation of all possible sample proportions increases as the sample size increases - TRUE OR FALSE
2 answers
asked by
CS
629 views
A manufacturer of liquid crystal displays (LCDs) is studying their production lines. The probability of sampling a defective LCD
3 answers
asked anonymously
47 views
Angela is conducting a poll on campus to determine the next student representative. How many students does she need to sample
1 answer
asked by
Ana
405 views
Why do most of the sample means differ somewhat from the population mean? What is this difference called?
3 answers
asked by
Jennifer
900 views
A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a sample is needed in order to
1 answer
asked by
gg
646 views
A sample of 12 observations is selected from a normal population for which the population standard deviation is known to be 4.
1 answer
asked by
liam
728 views
I need some help on this question it has two parts but i can't figure it out. Can someone help me.
The NDSU library checks out an
1 answer
asked by
John
435 views
Suppose that the proportion of students who used the Internet as their major resource for school in the past was 66%. A sample
1 answer
asked by
Adam
853 views
Run the simulation using n = 30 and N = 10 for a uniform, a bell-shaped, and a skewed distribution.
Identify the mean of the
1 answer
asked by
Karen
474 views
I'm having a hard time with question, can someone help me?
A random sample of medical files is used to estimate the proportion p
2 answers
asked by
Kim
681 views
a sample of 150 adults is composed of 100 women and 50 men. estimate the standard error of the proportion for the female
2 answers
asked by
suzanne
972 views
How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when
1 answer
asked by
klarisa
389 views
A carton of soy milk states on the label that it contains 956 mL.
The volume of soy milk in 9 randomly chosen cartons is measured
1 answer
asked by
farita
470 views
How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when
3 answers
asked by
theresa
908 views
Given the situation described, identify the type of sampling involved. A parish in Louisiana is divided geographically into
3 answers
asked by
lisa
443 views
A statistician needs to survey a sample of 50 people that is representative of voters in his community. He prepared a list of
5 answers
asked by
sylvia
597 views
Find the sample size that produces the margin of error +-4.0%
a) 325 b) 25 c) 16 d) 625
1 answer
asked by
Skye
390 views
A researcher is hired by a company to ascertain the morale of company employees. The company employs over 10,000 employees. The
6 answers
asked by
Thara!
1,300 views
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