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Mean and Standard Deviation
Page 3
Questions (135)
A teacher finds that the test scores of a group of 40 students have a mean of 75 and a standard deviation of 10. If Anne has a
3 answers
asked by
latisha
577 views
Suppose that a coin is tossed 100 times. Let X be the number of times that it shows heads. Find the mean and standard deviation
2 answers
asked by
Mschribe
573 views
From past experience, an airline has found the luggage weight for individual air travelers on its trans-Atlantic route to have a
2 answers
asked by
Mariah
558 views
The following table gives the total caseload in the New York State courts form 2004 through 2009.
Year 2004 2005 2006 2007 2008
4 answers
asked by
lijm
548 views
A pop-music record firm wants the distribution of lengths of cuts on its record to have an average of 129 seconds and a standard
2 answers
asked by
Samantha
500 views
Miss C gives a test to the 10 students in her first-period algebra class. The grades are
93,82,95,86,90,84,89,79,87,93 A. Find
2 answers
asked by
Kate
528 views
An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 25.9 years
2 answers
asked by
Casey
512 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
2 answers
asked by
Nancy
504 views
Did you ever buy an incandescent light bulb that failed (either burned out or did not work) the first time you turned the switch
2 answers
asked by
Jenny
519 views
Assume that the cure rate for a certain drug is 20% and that 15 patients are tested with this drug. Find the following:
a) Mean
1 answer
asked by
Mary
515 views
Age at onset of dementia was determined for a sample pf adults between the ages of 60 and 75. For 15 subjects, the results were
2 answers
asked by
daniel
479 views
If a group of data has a mean of 19 and a standard deviation of 77.8, what is the interval that should contain at least 88.9% of
2 answers
asked by
Rachel
441 views
Please read and use the following information to answer questions 11, 12, and 13:
Big packages of M&M Plain Candies have a mean
1 answer
asked by
mike
449 views
you have a box of 12 widgets whose average weight for each individual widget is 2.6 pounds with a standard deviation of 3.3
1 answer
asked by
chandler
472 views
In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 25
1 answer
asked by
Jasmine
460 views
The waiting time at an elevator is uniformly distributed between 30 and 200 seconds. Find the mean and standard deviation of the
1 answer
asked anonymously
36 views
A student organization uses the proceeds from a soft drink vending machine to finance its activities. The price per can was
1 answer
asked anonymously
24 views
The mean and standard deviation of 20 observations are found to be
10 and 2 respectively. On rechecking, it was found that an
1 answer
asked anonymously
22 views
Which answer shows
i. The mean of the distribution of ii. The standard deviation of the distribution of iii. The mean of the
1 answer
asked anonymously
22 views
Which answer shows
i. The mean of the distribution of ii. The standard deviation of the distribution of iii. The mean of the
1 answer
asked anonymously
19 views
A data set has mean μ
and standard deviation σ . Which statement is correct?(1 point) Responses A value chosen randomly from
3 answers
asked anonymously
27 views
Sharon is analyzing the points scored in a quiz competition by three high schools. She has calculated the mean and standard
1 answer
asked anonymously
20 views
Eric surveyed three different restaurants about the amount of time they spend, in hours, on washing dishes in a week. He found
1 answer
asked anonymously
16 views
Find the mean and standard deviation of the following data set. Round to the nearest tenth. 11,14,15,16,16,17,18,19,23
1 answer
asked anonymously
13 views
A population is skewed strongly to the right with a mean of 140 and a standard deviation of 18. We create a sampling
1 answer
asked anonymously
23 views
Find the mean and standard deviation for the following data set. Round to the nearest tenth.
11, 14, 15, 15, 16, 16, 17, 18, 19,
1 answer
asked by
Anonymous
13 views
A data set has mean and standard deviation Which statement is correct? A value chosen randomly from the data set will typically
1 answer
asked anonymously
7 views
Find the mean and standard deviation for the following data set. Round to the nearest tenth. 11, 14, 15, 15, 16, 16, 17, 18, 19,
1 answer
asked anonymously
16 views
Eric surveyed three different restaurants about the amount of time they spend, in hours, on washing dishes in a week. He found
1 answer
asked anonymously
9 views
Sharon is analyzing the points scored in a quiz competition by three high schools. She has calculated the mean and standard
1 answer
asked anonymously
18 views
Sharon is analyzing the points scored in a quiz competition by three high schools. She has calculated the mean and standard
1 answer
asked anonymously
29 views
Major league baseball salaries averaged R3.26 million with a standard deviation of R 1.2 million in a recent year. Suppose a
1 answer
asked anonymously
8 views
A population has a mean of 17 with a standard deviation of 2. A sample of 50 items from that population has a mean of 16.5 with
1 answer
asked anonymously
13 views
For a project, Fay kept track of the total annual amount of precipitation in inches for two cities over the last 12
years. The
1 answer
asked by
Hana
12 views
What are the mean and standard deviation of the set of data?
2. Does the data follow a normal distribution? Be sure to
1 answer
asked by
bot
16 views
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