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Questions (853)
People end up tossing 12% of what they buy at the grocery store (Reader's Digest, March 2009). Assume this is the true
4 answers
asked by
Vanessa
4,780 views
You are surveying students to find out their opinion of the quality of food served in the school cafeteria. You decide to poll
10 answers
asked by
Gwen
4,247 views
There are 3,000 people at a concert. You survey a random sample of 200 people and find that for 35 of them this is the first
11 answers
asked by
Gwen
3,585 views
Note: Your teacher will grade your responses to questions 18 and 19 to ensure that you receive proper credit for your answers.
18
10 answers
asked by
2,673 views
Suppose the mean length of time that a caller is placed on hold when telephoning a customer service center is 23.8 seconds, with
4 answers
asked by
daniel
1,830 views
Good evening everyone. I have the below math problem. I am a bit confused on exactly what they are asking?
Members of a polling
7 answers
asked by
Patrick
1,258 views
Assuming the population has an approximate normal distribution, if a sample size n = 17 has a sample mean x = 47 with a sample
2 answers
asked by
Amy
768 views
Let x stand for the length of an individual screw. 100 screws were sampled at a time. The population mean is 2.5 inches and the
4 answers
asked by
Angel
1,073 views
I have all the answers for c I just need to make sure I am correct. For b I am a little lost. For a I have the answer but I know
13 answers
asked by
Cindy65
7,614 views
A random sample of size 100 is drawn from a population with a standard deviation of 10. If only 5% of the time a sample mean
5 answers
asked by
Matthew
1,966 views
A researcher is interested in estimating the average salary of teachers in a large urban school district. She wants to be 95%
5 answers
asked by
jr
4,723 views
For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of
5 answers
asked by
Mae
2,573 views
A researcher is studying the effects of caffeine on exam scores of college students.
In this study: What would be the population
4 answers
asked by
Slomo
2,284 views
John Davis, a manager of a supermarket, wants to estimate the proportion of customers that will be using food stamps at his
5 answers
asked by
Mark
3,564 views
A study of 29 female Sumatran elephants provided a 95% confidence interval for the mean shoulder height as (197.2, 235.1) cm.
5 answers
asked by
Tabetha
3,357 views
Zillow.com contains several hundred postings for two‑bedroom apartments in your city. A random sample of 𝑛=16 postings from
3 answers
asked by
em mm
290 views
The amount of corn chips dispensed into a 16-ounce bag by the dispensing machine has been identified at
possessing a normal
6 answers
asked by
UG
8,447 views
The distribution of weekly salaries at a large company is reverse J-shaped with a mean of $1000 and a standard deviation of
4 answers
asked by
Janet
3,956 views
A lottery uses 4 urns containing chips 0 to 9. One chip is selected at random from each urn. How many sample points are in the
4 answers
asked by
Tammy
2,380 views
As a manager for an advertising company, you must plan a campaign designed to increase Twitter usage. A recent survey suggests
4 answers
asked by
e
2,280 views
Given a population comprised of 30 bats, 15 gloves, and 60 balls, if sampling is random and one at a rime without replacement,
wh
4 answers
asked by
Lou
2,240 views
The average age of a vehicle registered in the U.S. is 8 years, or 96 months. If a random sample of 36 vehicles is selected,
4 answers
asked by
Jana
2,113 views
If we test a small number of light bulbs from a large group, the small group is called a:
A. breakout session B. Population C.
5 answers
asked by
Tykrane
1,771 views
PLEASE GET BACK TO ME ASAP!!
1) Use the given data to find the minimum sample size required to estimate the population
3 answers
asked by
Green
2,856 views
From a shipment of 75 transistors, 6 of which are defective, a sample of 5 transistors is selected at random.
(a) In how many
4 answers
asked by
Joe
1,183 views
Of the parts produced by a particular machine, 1.5% are defective. If a random sample of 11 parts produced by this machine
3 answers
asked by
HELP
1,418 views
a study is undertaken to determine the proportion of industry executives who believe that worker's pay should be based on
4 answers
asked by
Anonymous
1,679 views
Suppose that 20% of the adult women in the
United States dye or highlight their hair. We would like to know the probability that
4 answers
asked by
Rita
1,525 views
Suppose babies born in a large hospital have a mean weight of 3181 grams, and a standard deviation of 526. If 97 babies are
4 answers
asked by
kyle
4,987 views
According to the local real estate board, the average number of days that homes stay on the market before selling is 78.4 with a
4 answers
asked by
Anonymous
1,990 views
When the purpose of sampling is to detect when a process becomes too variable, the chart of choice will be an R chart.
True False
3 answers
asked by
Stuart
430 views
Use the given data to find the minimum sample size required to estimate a population proportion or percentage.
Margin of error:
4 answers
asked by
Rob
2,787 views
The average age for licensed drivers in the county
is μ � 40.3 years with a standard deviation of � � 13.2 years. a. A
3 answers
asked by
Anonymous
992 views
A researcher wishes to estimate the proportion of adults living in rural areas who own a gun. He wishes to achieve a margin of
3 answers
asked by
liz
1,908 views
A population has a mean =80 and a standard deviation =8. find the mean and standard deviation of a sampling distribution of
3 answers
asked by
antorio
1,275 views
When sampling is done for the proportion of defective items in a large shipment, where the population proportion is 0.18 and the
5 answers
asked by
Jackie
936 views
The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard
6 answers
asked by
Terra
6,881 views
If random samples, each with n = 36 scores, are selected from a normal population with m = 80 and s = 18, how much difference,
3 answers
asked by
Anonymous
1,560 views
An automobile repair shop has determined that the average service time on an automobile is 2 hours with a standard deviation of
4 answers
asked by
sandy
1,351 views
1. joan asked 30 randomly selected adult restaurant customers about their choice of beverages. eighteen customers said coffee is
6 answers
asked by
mackenzie
1,450 views
The music industry must adjust to the growing practice of consumers downloading songs instead of buying CDs. It therefore
3 answers
asked by
Elizabeth
937 views
The GPA at a particular school has an average of 2.89 with a standard deviation of 0.63. A random sample of 38 students from
3 answers
asked anonymously
48 views
in a particular hospital, 60% of the staff is male and 40% female. In a random sample of 50 staff members, what is the
3 answers
asked anonymously
51 views
A manufacturer of cell phones has decided that an assembly line will be considered to be operating satisfactorily if less than
3 answers
asked by
Alyssa
2,009 views
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the
4 answers
asked by
Jenifer
4,365 views
are you a chocolate "purist", or do you like other ingredients in your chocolate? american demographics reports that almost 75%
4 answers
asked by
Brittany
2,190 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
Robin
5,736 views
Assume a data set has µ = 450 and σ = 50. If you were to take repeated random samples of n = 16 from that data set, what would
3 answers
asked by
cherry
706 views
samples of size n=900 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator,
4 answers
asked by
Tonnickie
2,605 views
You take and SRS of size 25 from a population with mean 200 and standard deviation of 10. Find the mean and the standard
3 answers
asked by
Ryan
823 views
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