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Questions (853)
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
878 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
874 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
878 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
885 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
877 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
857 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
852 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
847 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
849 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
838 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
4,207 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
823 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
820 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
818 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
814 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
813 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
819 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
807 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
773 views
Differentiate population from sample
2 answers
asked by
joshua
782 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
793 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
841 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
444 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
804 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
778 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
781 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
767 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
765 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
766 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
453 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
759 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
758 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
753 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
747 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
727 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
738 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
752 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
734 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
728 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
724 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
694 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
699 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
720 views
It has been reported that 48% of teenagers play video games on their phones. A random sample of 60 teenages is drawn. Find the
2 answers
asked by
Obi
718 views
Use the margin of error E = $10, confidence level of 99%, and ó = $40 to find the minimum sample size needed to estimate an
2 answers
asked by
Jessica
700 views
assume that the volume of drink is normally distributed, with a mean of 2.0 liters and a standard deviation of 0.05 liter. Using
2 answers
asked by
virginia
716 views
The number of books sold over the course of the three-day book fair were: 365, 303, 401. Assume that samples of size 2 are
1 answer
asked by
Elizabeth
697 views
A nationwide study indicated that 27% of adults said that chocolate was their favorite ice cream flavor. A simple random sample
2 answers
asked by
Megan
714 views
10. A random sample of n=36 scores is selected from a normal distribution with a mean of u=60. After a treatment is administered
2 answers
asked by
Anonymous
711 views
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