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Sampling
Page 4
Questions (861)
The daily sales at a convenience store have a mean of $1350 and a standard deviation of $150. Assuming n/N is less than or equal
3 answers
asked by
Felicia
602 views
i need help with identify population sample and sampling method
4 answers
asked by
chris
459 views
Professor Smith conducted a class exercise in which students ran a computer program to generate random samples from a population
3 answers
asked by
lauren
1,895 views
1.The manager of the Millcreek Mall wants to know the mean age of the people who shop at the mall and the stores in which they
4 answers
asked by
Bonnie
942 views
random sample of size 36 is taken from a population with mean 50 and standard deviation 5. Find P( x¯ < 51.5).
3 answers
asked by
Tammy
3,052 views
A random sample of size n is to be drawn from a population with a mean = 500 and sd = 100. What sample size would be necessary
4 answers
asked by
Karen
740 views
A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144
3 answers
asked by
mina
1,417 views
Scores on an SAT test have a mean of μ = 1026 and a standard deviation of σ = 209. Compute the margin of error of the sample
3 answers
asked by
Allie
944 views
what is the basic logic of probability sampling? How does such concepts as homogeneity, heterogeneity, sampling bias,
3 answers
asked by
Pamela
877 views
Suppose babies born in a large Hospital have a mean weight of 4088 in a variance of 5569. if 128 babies are sample that a random
3 answers
asked by
Marcus
1,893 views
A shoe company wants to gauge opinions of a new shoe design. They send out 100 pairs to people in four different cities, but
12 answers
asked by
Isiah
1,625 views
College officials want to estimate the percentage of students who carry a gun, knife, or other such weapon. How many randomly
4 answers
asked by
Richelle
1,166 views
The percentage of people not covered by health care insurance in 2003 was 15.6% (Statistical Abstract of the United States,
3 answers
asked by
Maria
804 views
What formula do I use to solve: A sample with a mean of M = 40 and a variance of s2 = 20 has an estimated standard error of 2
3 answers
asked by
brenda
1,371 views
An IQ is designed so that the mean is 100 and the standard deviation is 23 for the population of
Normal adults, find the sample
2 answers
asked by
joe
846 views
A random sample of n = 4 scores is selected from a population with ƒÝ = 80 and ƒã = 20. On average, how much difference
2 answers
asked by
Lyndyc
837 views
from a normally distributed infinite number of iron bars lengths with a mean and standard deviation as 4 ft. and 0.6 ft.
3 answers
asked by
aman
559 views
Suppose the U.S. president wants an estimate of the proportion of the population who support his current policy toward revisions
2 answers
asked by
Adam Dane
1,021 views
If the population standard deviation is � � 8, how
large a sample is necessary to have a standard error that is: a. less than 4
1 answer
asked by
Tracy
367 views
A random sample of 84 shoppers were interviewed and 51 said they prefer to shop alone rather than with someone such as friends
3 answers
asked by
Anonymous
874 views
What is the easiest way to reduce sampling error? What is the relationship between sampling error and the generalizability of
3 answers
asked by
Lindsey
643 views
determine the probability that a sample of 49 boxes will have a mean weight below 365 grams. past records show that the
2 answers
asked by
wanda
558 views
1. A state’s department of education reports that 12% of the high school students in that state attend private schools. The
3 answers
asked by
fast eddie
2,109 views
Four marbles are drawn at random from a bag containing 7 black marbles and 10 red marbles. Determine the number of outcomes in
3 answers
asked by
ally
737 views
A simple random sample of size n = 300 is obtained from a population whose size is and whose population size is n=20,000 ans
3 answers
asked by
jackie
1,207 views
Determine the sample size necessary to estimate a population proportion to within .03 with 90% confidence assuming you have no
4 answers
asked by
Tom
2,600 views
If the standard error of the sampling distribution of the sample proportion is .0337 for samples of size 200, then the
3 answers
asked by
Raja
448 views
A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time
4 answers
asked by
Zenna
1,777 views
Suppose we have a random sample of 300 people. 30 of these people are left handed. The upper limit of the 95% confidence
2 answers
asked anonymously
46 views
At a concert, a representative sample is collected of men and women. The sample contains 9 men and 7 women. Which inference
7 answers
asked anonymously
95 views
An analog input signal x(t) = 1.5 + 1.5sin(5t) is
sampled with 1 kHz sampling frequency fs. Assuming that sampling starts at t =
1 answer
asked by
Anonymous
70 views
Exercise: Polling
4 points possible (graded) We saw that if we want to have a probability of at least 95% that the poll results
1 answer
asked by
Misso
123 views
A population has a mean of 200 and a standard deviation of 50. A simple random sample
of size 100 will be taken and the sample
1 answer
asked by
ghhd
140 views
Find the minimum sample size required to estimate an unknown population mean using the given data.
Confidence Level: 90% Margin
1 answer
asked by
Jamaica Sajor
361 views
The time to occurrence of coronary artery disease in Iowa is heavily right skewed witha mean of 45 and standard deviation of 16.
1 answer
asked by
Ava
226 views
A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained
2 answers
asked by
Lora
549 views
A survey found at 30 students in random sample of 150 students at the local high school own a portable CD player. The school has
2 answers
asked by
Alejandra
493 views
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and
2 answers
asked by
Tad
538 views
Suppose a random sample of size 58 is selected from a population with σ = 9. Find the value of the standard error of the mean
3 answers
asked by
Sal
1,179 views
Let Y = the number of hours a student studies for the midterm.
From previous semesters we know that Y ∼ N(6, 1.5). What is the
1 answer
asked by
Olivia
399 views
1.A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is
1 answer
asked by
SANNM
483 views
Sampling.
Use ONE page of your community’s telephone book to complete the following: Build a sample using SRS (N=10). Build a
2 answers
asked by
Faye
547 views
1. A new movie open the other day. So far 500,000 people have seen. The producers of the movie need to know if the people liked
2 answers
asked by
Haley
913 views
A national garden club president thinks 70% of its members plant tulips for the spring. Phone calls were made to 100 members. Of
5 answers
asked by
Ashley
546 views
Thirty-six percent of the adults in a town are believed to own a dog. Of 50 adults who were asked if they own a dog, 22 said
1 answer
asked by
Ryleigh
426 views
The Centers for Disease Control reported the percentage of people 18 years of age and older who smoke (CDC website, December 14,
3 answers
asked by
Brandon
2,062 views
The number of immigrants living in a certain country with a large population makes up 35% of the population. In a random sample
2 answers
asked by
Anonymous
518 views
A random sample of size n is to be drawn from a population with a mean = 500 and sd = 100. What sample size would be necessary
2 answers
asked by
Anonymous
568 views
30% of the fifth grade students in a large school district read below grade level. The distribution of sample proportions of
1 answer
asked by
angela
815 views
What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%
1 answer
asked by
Jim
345 views
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