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Statistics
Page 10
Questions (20,117)
George gathered samples for the average monthly precipitation, in inches, for two cities and recorded the results in the
4 answers
asked by
Bonnie
1,840 views
Suppose x has a normal distribution with sigma = 1.2. Find the minimal sample size required so that for a 95% confidence
3 answers
asked by
Anonymous
3,220 views
Maria surveyed girls on the amount (in $) they spent on a dress for the middle school spring fling:
79, 79, 79, 82, 84, 85, 89,
10 answers
asked by
I NEED ANSWER FAST!!!
89 views
a set of data points has a correlation r= -0.86 your friend claims that because the correlation is close to -1 it is reasonable
4 answers
asked by
Hanna
3,081 views
Kris writes the following description of a dataset:
The mean of the set is 2. The spread of the set is 3. The overall shape of
4 answers
asked by
Muntasir Zarif
183 views
Which measure of variability—range or IQR—best describes the spread of the dataset?
Social studies group project grades (out
4 answers
asked by
APPLE JUICE
119 views
Leon counts the number of bugs he finds on his tomato plants each day and collects the following data: 18, 24, 15, 9, 10. The
2 answers
asked by
APPLE JUICE
73 views
A professor grades students on three tests, four quizzes, and a final examination. Each test counts as two quizzes and the final
4 answers
asked by
lisa
2,199 views
The height , in meters, of 500 people are normally distributed with standard deviation 0.080.Given that the heights of 129 of
4 answers
asked by
Raj
1,381 views
Make a box-and-whisker plot of the data. 60,63,53,66,65,58,51,55,58,51,58,62,53,66,61,51,65,52,54,50
Can I have some help with
5 answers
asked by
Anonymous
2,125 views
Instant dinner comes in packages with weights that are normally distributed with a standard deviation of 0.3 oz. If 2.3 percent
5 answers
asked by
missy
1,874 views
On a certain exam, Tony corrected
10 papers and found the mean for his group to be 80. Alice corrected the remaining 50 papers
4 answers
asked by
Kelly
1,094 views
Find the z-score such that the area under the standard normal curve to the left is 0.25
5 answers
asked by
Allen
3,174 views
What is the median of the data set below? Round to the nearest while number.
Test scores: 76, 92, 84, 97, 72, 88, 77
4 answers
asked by
Nick
1,119 views
A student asks if it is possible to have a standard deviation of -5. How do you respond?
4 answers
asked by
Enis
926 views
7. Find the mean, median, and mode of the data set.
Explain which measure of central tendency best describes the data. pages of
7 answers
asked by
Jo
2,668 views
(c) The following table shows the values, in thousands of dollars, of 40 randomly selected houses in the city.
34 38 95 110 137
7 answers
asked by
Anonymous
5,313 views
Suppose the final exam scores in a large class is symmetric mound shaped with a mean of 70 points and standard deviation of 10
5 answers
asked by
Anonymous
2,707 views
A survey for brand recognition is done and it is determined that 68% of consumers have heard of Dull Computer Company. If a
4 answers
asked by
Amy
13,188 views
Suppose a data set has a linear regression line of y = 6 -0.8x. If the mean of the x's is 5, what is the mean of the y's?
2 5 10
4 answers
asked by
Lindsey
1,748 views
the life time of a certain kind of mean life of 400 hours and standard deviation of 45 hours. assuming the distribution of life
4 answers
asked by
Priya
1,566 views
39% of adults say cashews are their favorite kind of nut. You randomly select 12 adults and ask each to name their favvorite
5 answers
asked by
Mecca
5,485 views
A university has 1,000 computers available for students to use. Each computer
has a 250-gigabyte hard drive. The university wants
3 answers
asked by
Shelby
2,555 views
Find the area under the standard normal curve between z = 0 and z = 1.37.
5 answers
asked by
Sharon
969 views
A confidence interval for a population mean has a margin of error of 3.1.
a)Determine the length of the confidence interval. b)If
4 answers
asked by
Anonymous
4,596 views
I you are told that a data set has a mean of 25 and a variance of 0 you can conclude that
A)There is only one observation in the
5 answers
asked by
Dom
2,874 views
We wish to estimate an unknown quantity Θ. Our measuring equipment produces an observation of the form X-Θ3 + W, where W is a
5 answers
asked by
ndwjhro
2,378 views
he level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.7 grams per mile and standard
5 answers
asked by
zoolo
3,038 views
Let X1,X2,…,Xn be i.i.d. random variables with mean μ and variance σ2 . Denote the sample mean by X¯¯¯¯n=∑ni=1Xin .
Ass
4 answers
asked by
Help
3,350 views
7. The weight of adults in a certain city has a mean of 130 lbs, with standard deviation of 41
lbs. A sample of 25 adults living
4 answers
asked by
fikremariam
678 views
A motorist drives 80km/h at an average speed of 63km/h. Which average is this: mean, mode, median?
6 answers
asked by
Paul
1,049 views
A. In a given normal distribution, the sample mean is 75 and the sample standard deviation is 4. Find the corresponding standard
4 answers
asked by
Sylvia
3,483 views
2. At a local university, a sample of 49 evening students was selected in order to determine whether
the average age of the
4 answers
asked by
raj
3,097 views
In a class of 50 high school juniors, 32 students either play a sport or are in the marching band. There are 22 juniors who
4 answers
asked by
Karri
1,594 views
Kim wants to determine a 95 percent confidence interval for the true proportion of high school students in the area who attend
4 answers
asked by
Jae
6,339 views
Use the list below to find the upper quartile.
27, 5, 11, 13, 10, 8, 14, 18, 7 A. 11 B. 13 C. 14 D. 16
9 answers
asked by
Ezzie
1,620 views
The range in a frequency distribution is 22. If the lowest value is 3, what is the highest value?
4 answers
asked by
Reannon
1,083 views
A company that produces detergents wants to estimate the mean amount of detergent in 64-ounce jugs at a 99% confidence level.
4 answers
asked by
----
2,869 views
If you told someone that the greatest depth of Lake Superior is 1333ft would you be expressing a number similar to mode, median,
4 answers
asked by
Connor
1,322 views
The mean score on a normally distributed exam is 42 with a standard deviation of 12.1. Which socre would be expected to occur
4 answers
asked by
Tami
1,573 views
In the first six days of the month of November, the rainfall was 39mm, 21mm,17mm,11mm,0mm and 2mm. It didn't rain on any of the
10 answers
asked by
Fiyinfoluwa
543 views
2. Which question is an example of a statistical question?
A . Ask all your friends, " What is your favorite color"?^^^ B. Ask
6 answers
asked by
Mary
2,358 views
A test has 200 points. THe mean is 120 and the standard deviation is 20. In order to pass the test one must score 140 points. If
4 answers
asked by
Dee
541 views
women's heights are normally distributed with a mean 63.1 in and standard deviation of 2.5. A social organization for tall
5 answers
asked by
Jenn
1,908 views
find the area between z=0 and z=0.9 under the standard normal curve is
4 answers
asked by
Linda
2,013 views
A poll asked 500 adults if they thought Ontario should produce more, less or maintain current production of ethanol.
-160 people
4 answers
asked by
anon
1,278 views
what are the mean median mode and range of the data set 18, 19, 20, 21, 23, 26, 26, 26
4 answers
asked by
math kid
1,082 views
The weights of male nurses in a hospital are known to be normally distributed with mean ƒÝ = 72 kg and standard deviation ƒã
4 answers
asked by
nide
795 views
Find the area under the standard normal curve between -1.32 and the mean, P(-1.32 < z < 0.00). (Give your answer correct to four
4 answers
asked by
Nora 62
1,790 views
what is the range of this data 36 75 63 49 83 46 54 79 ?
4 answers
asked by
daphne
1,061 views
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