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Sampling
Page 9
Questions (965)
Use the given information to find the minimum sample size required to estimate an unknown population mean u. How many
adults must
2 answers
asked by
anonymous
907 views
An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.9 years
2 answers
asked by
jennifer
903 views
a random sample of 100 college students is taken from the student body of a large university. assume that a population mean of
3 answers
asked by
jc
915 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
910 views
Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2°F and a standard deviation of
1 answer
asked by
ali awan
907 views
A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only
1 answer
asked by
Livia
893 views
The mean life expectancy of a certain type of light bulb is 945 hours with a standard deviation of 21 hours. What is the
2 answers
asked by
tf9346
879 views
The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has
standard error 0.008kg. Choose the option that is
1 answer
asked by
albert
878 views
A researcher is interested in
estimating the average salary of teachers in a large urban school district. She wants to be 95%
4 answers
asked by
Anonymous
882 views
A simple random sample of a size n is drawn from a population that is normally distributed. The sample mean, x is found to be
2 answers
asked by
Anonymous
892 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
3 answers
asked by
ray
881 views
A customer from Cavallaro's Fruit Stand picks a sample of 3 oranges at random from a crate containing 65 oranges, of which 4 are
2 answers
asked by
Lea
861 views
We take a simple random sample of 100 people and check their ages. Out of the 100, 15 are 65. What is the probability that the
2 answers
asked by
Anonymous
854 views
A sample of 4 balls is to be selected at random from an urn containing 18 balls numbered 1 to 18. Five balls are green, 6 balls
2 answers
asked by
Lindsey
852 views
Hi(-:
A newspaper editor wants to know whether people who buy the newspaper like the paper’s new format. He prints an
4 answers
asked by
Crystal
851 views
Please help with this question.The mean weight of the contents of samples of 30 bags of sugar has
standard error 0.008kg.The mean
2 answers
asked by
Rebecca
842 views
5. A school newspaper article claims that 60% of the students at a large high school did all their assigned homework last week.
3 answers
asked by
Anonymous
4,215 views
using a simple random sampling, select a sample of 12 students out of a population of 30 students comprises of 20 females and 10
2 answers
asked by
Bekesuoyeibob
828 views
A simple random sample is drawn from a normally distributed population. The value of which of the following will not be known
2 answers
asked by
ashley
831 views
When a new machine is functioning properly, only 2% of the items produced are defective. If 5 parts are randomly selected from
1 answer
asked by
lonestar college
821 views
Determine the minimum sample size required in order to be 95% confident that our estimate is within 4% of the true percent of
2 answers
asked by
mary
815 views
Suppose that the weight of male babies less than 2 months old is normally distributed with mean 11.5 pounds and standard
1 answer
asked by
Tommy
820 views
Among 15 metal parts produced in a machine shop, 4 are defective. If a random sample of five of these metal parts is selected,
2 answers
asked by
akb
821 views
A study of peach trees found that the average number of peaches per tree was 625. The standard deviation of the population is
2 answers
asked by
betsy
810 views
A population is normally distributed with a man of 100 and a standard deviation of 15. is it unusual for themean of a sample of
2 answers
asked by
Donna
774 views
Differentiate population from sample
2 answers
asked by
joshua
792 views
We observe a sample proprotion p-hat = 0.3. If the standard deviation of the sampling distribution of p-hat is 0.04, what is the
2 answers
asked by
Morgan
795 views
An economist wants to estimate the mean income for the first year of work for college
graduates who majored in biology. How many
2 answers
asked by
Panther
846 views
The Tite Wire Company manufactures wires for circus acts. It has taken a
random sample of 100 pieces of wire and wants to see if
1 answer
asked by
Nancy
447 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
2 answers
asked by
Jake
808 views
What is the relationship between Sample Size and the width of the Confidence Interval? Please explain further as to why.
I
2 answers
asked by
MissPatte
786 views
Standard error:
Is always the standard deviation divided by the square root of n. Is a measure of the variability of a sample
6 answers
asked by
Susie
790 views
Darned old Foofy!
Foofy computes the x̅ (MEAN) from data that her professor says is a random sample from population Q. she
1 answer
asked by
Mari
772 views
the assets (in billions of dollars)of the four wealthiest people in a particular country are 46,34,12,10. Assume that the
2 answers
asked by
nannie
769 views
1. Draw a random sample of size 12 from a Poisson Population with mean 4 and calculate the sample mean.
4 answers
asked by
satish
769 views
Explain some of the obstacles to trying to build a sampling distribution through repeated samples, even with software.
The only
1 answer
asked by
Sara
454 views
A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only
1 answer
asked by
zzz
765 views
Describe the distribution of sample means (shape,
expected value, and standard error) for samples of n � 36 selected from a
2 answers
asked by
Cookie
763 views
The head of a computer science department is interested in estimating the proportion of students
entering the department who will
3 answers
asked by
Ann
763 views
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
1 answer
asked by
Felicia
756 views
The standard deviation of GPAs (grade point averages) of all male students at a college is .35 and the standard deviation of
2 answers
asked by
Lisa
750 views
A POLL OF 1300 RANDOMLY SELECTED STUDENTS IN GRADES 6 THROUGH-8 WAS CONDUCTED AND FOUND THAT 54% ENJOY PLAYING SPORTS. WOULD
3 answers
asked by
CHARLOTTE JAMES
733 views
Among 15 metal parts produced in a machine shop, 4 are defective. If a random sample of five of these metal parts is selected,
1 answer
asked by
akb
745 views
True or False
In order for the distribution of sample means to be normal, it must be based on samples of at least n = 30 scores.
2 answers
asked by
Lyndyc
758 views
A random sample of 84 shoppers were interviewed and 51 said they prefer to shop alone rather than with someone else. Let p
1 answer
asked by
Anonymous
741 views
Assume that a test is given to a large number of people but we do not yet know their scores or the shape of the score
2 answers
asked by
Mikos
733 views
Suppose a student reaches in the bag and randomly selects nine red chips and eleven yellow chips. Based on this sample, what is
4 answers
asked by
Layla
728 views
Find the minimum sample size n needed to estimate u for the given values of c, s, & E. c=0.98, s=6.5, & E=1.?
2 answers
asked by
Makaila
695 views
Suppose a large shipment of microwave ovens contained 18% defectives. If a sample of size 228 is selected, what isthe
1 answer
asked by
colleen
702 views
1. A simple random sample of 400 students is taken at a large university. The average height of the sampled students is 68
1 answer
asked by
Anonymous
724 views
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