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Sampling
Page 10
Questions (833)
If you have no preliminary estimate for p, how many business phone calls should you include in a random sample to be 98% sure
1 answer
asked by
Anonymous
675 views
A sample of 4 balls is to be selected at random from an urn containing 20 balls numbered 1 to 20. Six balls are green, 6 balls
2 answers
asked by
Lizzie
692 views
A researcher conducted a study of the access speed of 40 hard drives and concluded that his
maximum error of estimate was 15. If
3 answers
asked by
Koia
677 views
Suppose that the population standard deviation (ó) for a normally distributed standardized achievement test (ACT) is 6. What
2 answers
asked by
Anonymous
689 views
A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She
1 answer
asked by
MARY
675 views
1. A random sample of n = 16 scores is selected from a normal distribution with a mean of µ = 50 and a standard deviation of á
2 answers
asked by
jansa
678 views
A researcher is interested in estimating the average salary of Police officers in a large city. she want to be 95% confident
2 answers
asked by
rowlene
666 views
Assume we draw a simple random sample from a population having a mean of 100 and a standard deviation of 16. What is the
2 answers
asked by
Desire
679 views
The National Center for Education surveyed 4400 college graduates about the lengths of time required to earn their bachelor's
2 answers
asked by
katy
654 views
Find the sample size that produces the margin of error ± 3.0%
2 answers
asked by
jerson
631 views
In a population of 10,000 adults, 20% are smokers. A simple random sample of 600 of the adults is drawn.
a)The SE of the number
6 answers
asked by
tms
637 views
A manufacturing company produces 10,000 plastic glasses per week. This company supplies plastic glasses to another company,
1 answer
asked by
happy
650 views
If a sample of size 30 is selected, the value of A for the probability p(t¡Ý A)= 0.01 is?
3 answers
asked by
Lina
631 views
1.A sample of 25 bottles is taken from the production line at a local bottling plant. Assume that the fill amounts follow a
1 answer
asked by
abidjan
648 views
According to one pollster, 48% of people are afraid of flying. Suppose that a sample of size 20 is drawn. Find the value of
1 answer
asked by
Obi
631 views
The Pew Research Center has found that 86% of people 18 through 29 years old are social media users.
What is the probability that
2 answers
asked by
jax
600 views
a company alphabetically lists of all 6425 employees and wants to conduct a systematic sample of size 60.(a) What is k?k=107(b)
2 answers
asked by
Reina
615 views
a) What is sampling with replacement? (b) What is sampling without replacement? c) How does sampling without replacement affect
2 answers
asked by
Anonymous
636 views
A school principal randomly choose 75 students for a survey on the cafeteria food. Determine whether the sample may be biased.
2 answers
asked by
Elaina
592 views
IQ score are normally distributed with a mean of 95 and a standard deviation of 17. If the sample size is n=36 find the mean and
2 answers
asked by
Megan
588 views
Find a number 't' such that the probability that the sample mean will differ from the population mean by at least 't' is not
1 answer
asked by
Anonymous
595 views
Scenario 1: On Saturday, Kira stood outside the bowling alley from the time it opened until the time it closed. She asked the
2 answers
asked by
Nakoa The Rainbow
591 views
3. The mean volume of draught beer served in pint glasses in a particular pub is known to be 0.564 litres. A consumer
2 answers
asked by
najma
594 views
A simple random sample of 800 individuals provides 250 Yes responses.
2 answers
asked by
bob
568 views
On average 1 in 10 of the chocolates produced in a factory are mis-shapes.In a random sample of 1000 chocolates,find the
2 answers
asked by
Raj
581 views
Marcus wants to perdict the next student council president.He polls every fourth person from each grade level as they exit the
2 answers
asked by
Anonymous
571 views
A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she
2 answers
asked by
jose
594 views
At a certain concert, 43% of the audience was under 20 years old. A random sample of n = 181 members of the audience was
2 answers
asked by
Obi
577 views
Can someone please double check my answers (My answers are in Capital)
1. If you produce a million products a day and you want to
2 answers
asked by
mysterychicken
562 views
In a certain population the heights of men are normally distributed with mean 168.75 and variance 42.25 those of women are
2 answers
asked by
Malambo
578 views
I took a large sample of households in a city, and based on that, estimate the standard deviation of the income for all
3 answers
asked by
Macy
571 views
A random sample of size n is to be drawn from a population with a mean = 1100 and SD = 300. What sample size would be necessary
2 answers
asked by
Anonymous
572 views
A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. -
-
2 answers
asked by
robyn
572 views
What is the probability that simple random sample of 50 staff members provides a sample mean leave of 6.5 to 9.5 weeks?
2 answers
asked by
Melanie
546 views
A sample survey interviews an SRS of 115 college women. Suppose that 68% of all college women have been on a diet within the
2 answers
asked by
mathhelpplease
534 views
1. In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with
2 answers
asked by
JYD
563 views
A bin of 35 manufactured parts contains 6 defective parts and 29 non-defective
parts. A sample of size 5 parts is selected from
2 answers
asked by
Bryan
553 views
Q- Two samples of sizes 8 and 10 are drawn from two normally distributed population having variance 20 and 36 respectively. Find
2 answers
asked by
ashok yadav
534 views
Looking for someone to verify my homework answers on identifying the sample and population......
1) A group of 50,000 randomly
3 answers
asked by
Carmen
549 views
A TV pollster believes that 75% of all TV households would be tuned in to Game 6 of 1997 NBA Championship series between the
2 answers
asked by
Pat
543 views
A random sample of 1200 engineers included 48 Hispanic Americans,80 African Americans, and 204 females. Determine 90% CI for the
2 answers
asked by
Nithi
525 views
A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos
2 answers
asked by
Anonymous
534 views
In a study to estimate a population mean, i start with a sample size 10 and calculate the 95% confidence interval. Suppose i am
2 answers
asked by
Zodra
539 views
In the past a certain college has found that 35% of the students will grad within 4 years. A random sample of 450 students at
2 answers
asked by
danny
545 views
A sociologist is interested in the proportion of people that would attend a fund raiser if the had to pay to enter the event.
2 answers
asked by
Kelly
526 views
draw a simple random sample of 15 students from your class,and calculate sample mean and sample variance of their heights(use
2 answers
asked by
sireesha
525 views
From a shipment of 75 transistors, 4 of which are defective, a sample of 6 transistors is selected at random.
(b) How many
3 answers
asked by
Nikkie
576 views
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard
deviation of 15. A researcher
2 answers
asked by
Sally
527 views
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes
2 answers
asked by
Yesenia
550 views
Hannah selected a simple random sample of all adults in her town and based on this sample, consrtucted a confidence interval for
2 answers
asked by
Nicole
529 views
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