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Descriptive Statistics
Page 7
Questions (1,585)
A random sample M1, M2,M3...M8 is taken from a population with unknown mean x. For each of the following, state wether or not it
4 answers
asked by
Yo
340 views
The weights and heights of six mathematics students are given in the following table:
Weight (in pounds) Height (in centimeters)
3 answers
asked by
Anonymous
1,530 views
Heights of husbands and wives. The mean height of American women in their early twenties is about 64.5 inches and the standard
1 answer
asked by
Anonymous
1,178 views
In December 2010, the average price of regular unleaded gasoline excluding taxes in the United States was $3.06 per gallon,
4 answers
asked by
Keonn'a
1,402 views
The probability is 0.7 that a person shopping at a certain store will spend less than $20. For groups of size 13, find the mean
3 answers
asked by
Johnny
924 views
To study the efficiency of its new price-scanning equipment, a local supermarket monitored the amount of time its customers had
3 answers
asked by
Alyssa
1,664 views
You measure 64 children , obtaining a X of 57.28 . The mean is 56 and sd is 8 Slug says that bc this X is so close to the mean
3 answers
asked by
pam
680 views
The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for
3 answers
asked by
Anna
1,140 views
Which interval describes the number of hours spent studying in a typical week for about 50% of the students sampled?
2 to 9 9 to
3 answers
asked by
Jeannie
1,492 views
Assume that it takes a college student an average of 5 minutes to find a parking spot in the main parking lot. Assume also that
2 answers
asked by
Anonymous
913 views
Height of children in kindergarten described by normal mode with mean 39.2 inches and standard deviation of 1.9 inches.
What
3 answers
asked by
Ann
959 views
an essay contest requires that essay entries consist of 500 words with an absolute deviation of at most 30 words. what are the
3 answers
asked by
anonymous
1,393 views
1. of 500 randomly selected people in new york city, 210 people had O+ blood.
a) "42 percent of the people in NYC have O+ blood"
4 answers
asked by
kitty
1,331 views
Given the Variable X measured at a Nominal Level, what descriptive statistical indice would you give if asked to provide the
4 answers
asked by
Anonymous
1,279 views
The 60th percentile of a normal distribution is 110. The 70th percentile is 120. Find the 90th percentile.
3 answers
asked by
James
1,360 views
ten randomly selected people were asked how long they slept at night. The mean time was 7.1 hours and the (sample) standard
3 answers
asked by
Asia
1,769 views
The area between the mean and a Z score of +1.50 is 43.32%. This score is higher than ___ of the score in the distribution.
3 answers
asked by
DeeDee
2,693 views
If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation be fore the population from
3 answers
asked by
Leisa
1,167 views
The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school.
4 answers
asked by
Gee
3,078 views
Faculty in the psychology department at APUS consume an average of 5 cups of coffee per day with a standard deviation of 1.5.
2 answers
asked by
StudentD
856 views
The actual weights of bag of pet food are normally distributed.The mean of the weights is 50.0 lb,with a standard deviation of
2 answers
asked by
Anonymous
1,249 views
A professor informs her class that a test is very difficult, but the grades will be curved. Scores for the test are normally
4 answers
asked by
Sabrina
1,363 views
20. A study involves measuring the number of days absent from work for 216 employees of a large company during the preceding
3 answers
asked by
Katie
1,227 views
What happens to the mean, median and mode for the data shown if the outlier is eliminated?
8 3 5 3 23 4 7
4 answers
asked by
drea
971 views
Make up 20 hypothetical scores. Determine their mean, median, mode, and standard deviation.
4 answers
asked by
Janet
472 views
In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in
3 answers
asked by
Liz
2,394 views
A sample of 12 measurements has a mean of 34 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14
4 answers
asked by
Anonymous
1,387 views
A recent survey found that 63% of all adults over 50 wear glasses for driving. In a random sample of 80 adults over 50, what is
3 answers
asked by
Anonymous
2,472 views
If 80% of the applicants are able to pass a driver's proficiency road test, find the mean, variance, and standard deviation of
4 answers
asked by
jean
1,791 views
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of
4 answers
asked by
Sasha
1,452 views
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of
4 answers
asked by
anonymous
1,501 views
You asked ten of your classmates about their weight. On the basis of this information, you stated that the average weight of all
6 answers
asked by
Josephine
1,454 views
Can someone help me with this questions.
Find the variance for a given data. Rpund your answer to one more decimal place then the
3 answers
asked by
natalie
2,539 views
The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine.
(a
15 answers
asked by
AOL
79 views
In a certain city, the average 20- to 29-year old man is 69.8
inches tall, with a standard deviation of 3.2
2 answers
asked by
AOL
71 views
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2900
grams and a standard deviation of 700
11 answers
asked by
AOL
90 views
The table below shows how many minutes Mary spent exercising each day for the last two weeks.
Mary's Time Spent Exercising Sun
4 answers
asked by
5STARZ.VONN
179 views
use the following set of data for 1-2. 19, 18, 23, 24, 31, 32, 16
3 answers
asked by
wikdkitten
58 views
The stem-and-leaf plot shown displays the weights, in pounds, of the dogs in an animal rescue center.
What is the median weight
1 answer
asked by
Anonymous
279 views
If the height of 200 students is normally distributed with mean of 65 inches & std deviation 3.5 inches. How many students have
3 answers
asked by
Anonymous
191 views
The scores on a standardized test are Normal with mean = 50 and sd = 10.
a) What peoportion of scores falls less than 65? b) What
1 answer
asked by
far
345 views
Over 10,000 runners competed in a large urban marathon. The times of the runners follow a normal distribution. Using the
3 answers
asked by
abuahmed
264 views
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and
3 answers
asked by
Jorel Rosaldo
335 views
The weights of 10 boxes of a children brand of cereal have a mean content of 278 grams with an S.D of 9.64 grams. If these boxes
3 answers
asked by
mwk please help
669 views
You would like to determine the percentage of coffee drinkers in your university, and collected the following binary data set
3 answers
asked by
Bob
839 views
Identify any outliers in the following data set by first calculating the median and the interquartile range.
Number of texts sent
4 answers
asked by
anon
584 views
You interview your family members at a picnic and record their ages and shoe sizes. The data is shown in the table. Which number
13 answers
asked by
Anonymous
2,996 views
Automobile repair costs continue to rise with the average cost now at $367 per repair (U.S. News & World Report website, January
3 answers
asked by
Anonymous
4,691 views
Explain how it is possible for two sets of data to consist of different numbers but have the same mean, the same median, and the
3 answers
asked by
Anonymous
355 views
The raw data below represents the number of children living at home in a neighborhood of 24 homes. Which measure best describes
4 answers
asked by
Asa
495 views
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