Sunday

April 20, 2014

April 20, 2014

Number of results: 223,284

**Math**

Roughly speaking, the standard deviation indicates how far, on average, the observations are from the mean. Do you think that for the data set below the standard deviation will give a good indication of the typical deviation from the mean? 2, 3, 4, 4, 5, 5, 6, 6, 100 What ...
*Sunday, February 21, 2010 at 12:21pm by Lyndse*

**math standard deviation**

Calculate the standard deviation for the following yields of corn: 142, 161, 132, 143, 147, 145, 146, and 152 bu/ac. Are all yields obtained within one standard deviation of the mean?
*Saturday, January 19, 2013 at 1:03pm by LUA*

**math: standard deviation**

Calculate the standard deviation for the following yields of corn: 142, 161, 132, 143, 147, 145, 146, and 152 bu/ac. Are all yields obtained within one standard deviation of the mean?
*Sunday, January 20, 2013 at 12:19pm by LUA*

**Math Statistics**

In general, what is the relationship between the standard deviation and variance? a. Standard deviation equals the squared variance. b. Variance is the square root of standard deviation. c. Standard deviation is the square root of variance. d. These two measures are unrelated.
*Saturday, September 29, 2012 at 6:41pm by Misty*

**math**

Suppose x is a random variable with mean and standard deviation. If a large number of trials is observed, at least what percentage of these values is expected to lie beween mean-2(standard deviation) and mean + 2(standard deviation) could someone help me i'm so lost? thank you...
*Thursday, April 9, 2009 at 5:58pm by jake*

**Standard Deviation-What?**

I cannot figure out how to do standard deviation. standard deviation 2, 5, 47, 11, 13, 48, 39, 36
*Monday, June 14, 2010 at 10:57pm by bart*

**statistics**

I am wondering what the standard deviation is: is that the standard deviation on the textbook cost, or the standard deviation on the 80 students individual average?
*Sunday, August 22, 2010 at 3:04pm by bobpursley*

**Stastics**

When we convert x-value to z- score and use Standard Normal distribution, which of the following statements is true? a) The mean of z-score is zero and standard deviation of the z-scores is the same as the standard deviation of original data b) The mean and standard deviation ...
*Sunday, March 7, 2010 at 2:40pm by Mary *

**math help!!!!**

Compute the mean and the standard deviation. The mean is 71.1. You do the standard deviation. It is about 15. There are websites online that calculate it for you. 49 is 22.1 below the mean. The z-score is -22.1/(standard deviation)
*Monday, January 10, 2011 at 4:31pm by drwls*

**Math**

Calculate the standard deviation for Grow Em Fast and compare to 1.2 for Fatso 1B. To get standard deviation, first find mean. Get difference of each score from mean, square those differences and find their sum. Divide by n (9), and the square root of that quotient will be the...
*Saturday, September 11, 2010 at 11:13am by PsyDAG*

**Math**

You have reversed your values. The standard error is the standard deviation — not the mean — divided by the square root of n. You also want the mean ($600) [not the standard deviation] ± 2.58 times the standard error. I hope this helps. Thanks for asking.
*Wednesday, October 1, 2008 at 11:45am by PsyDAG*

**Statistics**

1) A Motor Company has purchased steel parts from a supplier for several years and has found that 10% of the parts must be returned because they are defective. An order of 25 parts is received. What are the mean and standard deviation of the defective parts? A) Mean = 3.5; ...
*Sunday, February 15, 2009 at 1:59pm by BEARHUG*

**Math: Statistics**

My homework has a list of numbers and I'm working with standard deviation. I know the standard deviation as well as the mean and everything, but it says to find "the weight that is 3 standard deviations below the mean." What is the formula for that, and can I do it on a TI-84...
*Tuesday, April 19, 2011 at 11:01pm by Justin*

**MATH**

A mean score on a standardized test is 50 with a standard deviation of 10. Answer the following a. What scores fall between –1 and +1 standard deviation? b. What percent of all scores fall between –1 and +1 standard deviation? c. What score falls at +2 standard deviations? d. ...
*Tuesday, April 3, 2012 at 10:20pm by Bridget*

**statistics**

An SRS of size n is taken from a large population whose distribution of income is extremely right-skewed and the mean income is calculated. Which of the following statements is false? a) When n > 30, the sampling distribution of is approximately normal. b) When n increases...
*Tuesday, April 17, 2012 at 8:51pm by Anna*

**algebra**

variance = 4, so standard deviation = 2 (because squareroot of 4 is 2) 160 - 166 = -6 = -3 standard deviation. You take out a normal distribution table and you find out that a standard deviation of -3 or less happens only 0.13% of the time. Answer : 0.13%
*Saturday, August 27, 2011 at 11:47pm by Martin*

**Math**

The mean of a sample of 25 was calculated as xbar = 500. The sample was randomly drawn from a population whose standard deviation is 15. Estimate the population mean with 99% confidence. B.) Repeat part (a) changing the population standard deviation to 30. C.) Repeat part (a) ...
*Tuesday, April 27, 2010 at 2:01pm by Joe*

**math**

if a test given to 100 people have a mean of 3.5 and a standard deviation is .5, what is the standard deviation of someone who scores 1.5?
*Wednesday, April 8, 2009 at 7:09pm by Debra*

**math**

Z = (raw score - mean)/Standard deviation Standard deviation = square root of variance I hope this helps. Thanks for asking.
*Wednesday, November 11, 2009 at 9:41pm by PsyDAG*

**Math- Ms Sue can you help**

Is there any reason you did not compute the standard deviation for each set of data? Standard deviation indicates variability.
*Sunday, March 31, 2013 at 6:25pm by bobpursley*

**math**

what is the standard deviation of the numbers {78, 79, 81, 82, 85}. And can you tell me how i am supposed to find the standard deviation
*Saturday, November 8, 2008 at 1:35pm by chase*

**Math**

if a test given to 100 people have a mean of 3.5 and a standard deviation is .5, what is the standard deviation of someone who scores 1.5>
*Wednesday, April 8, 2009 at 6:35pm by Debra*

**Satistics**

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability? Standard deviation of Mean = 0.476169 Standard deviation of Median = 0.753937
*Wednesday, October 5, 2011 at 2:21pm by Hope*

**Statistics**

If the standard deviation of a population is 56 and we want the standard error (the standard deviation of the sample mean) to be 14, then we need to take how many samples?
*Monday, December 20, 2010 at 3:23pm by Jana*

**homework statistics**

Assuming that you are referring to the standard deviation and not the standard error of the mean, the standard deviation will remain essentially the same.
*Friday, July 22, 2011 at 2:01am by PsyDAG*

**college math**

20. Calculate the range, variance, and standard deviation of the following data set: 5, 5, 6, 6, 6, 8, 8, 8, 8, 10, 10, 11, 12, 12, 20 (Points: 5) Range = 15; Variance = 225; Standard Deviation = 7.5 Range = 3.85; Variance = 14; Standard Deviation = 3.74 Range = 20; Variance...
*Monday, November 7, 2011 at 1:41pm by Anonymous*

**Statistics**

Standard error of the mean is the standard deviation of the sampling distribution of the means. Take the standard deviation (15) and divide by the square root of the sample size (100) for your answer.
*Sunday, October 14, 2012 at 9:41pm by MathGuru*

**Statistics**

1) Find the missing parameter 1.mean 15, 30.15 %, above 50; what is the standard deviation 2.mean 75, 5.05% below 30; what is the standard deviation 3.standard deviation 9, 85.08% below 105: what is the mean 4.standard deviation 16.8, 15.62% above 18.3: what is the mean
*Wednesday, October 17, 2007 at 2:24pm by LT*

**Statistics**

data from sample of 400 cases, variable has 95% confidence interval of 54.3 to 54.7 I found the mean- how do i find standard error- step by step please. Standard error = sd/√n Note: sd = standard deviation; n = sample size. You'll need to determine the standard deviation...
*Tuesday, April 10, 2007 at 3:17pm by Angel*

**math**

hi i need help calculating the standard error using the central limit theorem. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11, there are 5x5=25 samples of the two scores (n=2)* i already calculated the standard deviation and mean. for the question my ...
*Sunday, November 21, 2010 at 9:00pm by ash*

**MATH**

Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2 D. A normal ...
*Tuesday, December 7, 2010 at 1:25pm by KARINA*

**statistics/mean and standard deviation**

find the mean and standard deviation in the following probability distribution x 1 2 3 p(x) 0.2 0.6 0.2 *i think that the mean is 2 but am lost after that when it comes to the standard deviation. please show work and calculations. the more i work with numbers the more confused...
*Saturday, October 23, 2010 at 5:32pm by mary- please check calculations.*

**calculus**

From f(x) you see that 500 is the mean and 50 the standard deviation. You can write the interval 450-550 as: 500 +/- 50 = mean +/- standard deviation So, what's the probability a normally distributed variable to be within one standard deviation of the mean?
*Monday, June 4, 2012 at 4:22am by Count Iblis*

**statistics**

The standard deviation of the sampling distribution of the mean is called the standard error of the mean. I'm assuming that is what you wish to calculate. If so, determine the standard deviation and divide by the square root of the sample size.
*Tuesday, June 19, 2012 at 4:53pm by MathGuru*

**Math**

Repeated sample of 36 are drawn from a population with mean 52 and standard deviation 18. What is the standard deviation of the distribution of the sample means?
*Monday, March 28, 2011 at 6:36pm by Lori *

**Math**

Find the 95% confidence interval for the standard deviation of the lengths of pipes if a sample of 26 pipes has a standard deviation of 10 inches
*Friday, August 3, 2012 at 7:58pm by Anonymous*

**Math : Probability and Standard Deviation**

If you know that 68% of the wages are between the standard deviation range, which is true for a normal distribution, then you already have the answer. That IS the probability.
*Tuesday, October 23, 2007 at 4:32pm by drwls*

**MATH**

what is the unknown standard deviation of this problem Ho: m=4.7 Ha: m<4.7 alpha 1% standard deviation: unknown after a random sample of 36 the mean is 4.5 with s=0.42
*Wednesday, December 21, 2011 at 11:02am by AL*

**alegbra**

0.82 - 0.8 = 0.02 0.02/0.01 = 2 standard deviations You check a normal distribution table (unless you were provided with the value for 2 standard deviation already) You get : Greater than 2 standard deviation = 1 - 0.9772 = 0.0228
*Saturday, August 27, 2011 at 4:59pm by Martin*

**statistics**

A researcher administered a treatment to a sample of participants selected from a population of 80. If the researcher obtains a sample mean of M=88. Which combination of factors is most likely to result in rejecting the null hypothesis? a, alpha level=0.01 and standard ...
*Friday, November 9, 2012 at 7:35pm by Robbie*

**math**

You need to memorize this, pronto. In addition to being more understandable than the variance as a measure of the amount of variation in the data, the standard deviation summarizes how close observations are to the mean in a very nice way. Many variables in biology fit the ...
*Tuesday, April 12, 2011 at 2:00pm by bobpursley*

**statistics**

If a company is thinking of giving one department a 1000 bonus. Based on their means and standard deviation scores which set of employess will do better based on this information? Who should get the bonus? Employee A mean 16.875 standard deviation 4.45413 Employee B mean 12....
*Tuesday, November 22, 2011 at 9:14am by Linda*

**statistics**

a mean score on a standardized test is 50 with a standard deviation of 10. What are the following: 1. what scores fall between -1 and +1 standard deviation? 2. what percent of all scores fall between -1 and +1 standard deviation? 3. what score falls at +2 standard deviations? ...
*Friday, May 11, 2012 at 12:06pm by erica*

**Math**

I have a problem on standard deviation, and I will need some help with it. Problem: Each professor in an English class give an A to students scoring above 90 and a F to those scoring below 60. Professor 1 has a normal distribution with a mean of 74 and standard deviation 7 ...
*Tuesday, April 12, 2011 at 4:53pm by bikie*

**Statistics**

I think you can calculate the Z-scores for yourself. The Z-score assumes a normal distribution, taking into account the mean and standard deviation. From calculus, we know the proportions/percentages in the normal distribution. (See a table in the back of your statistics text...
*Wednesday, July 9, 2008 at 9:06pm by PsyDAG*

**Advanced Functions**

1. Find the following quantities by hand (except for the standard deviation) Check your results with your calculator: a. Minimum b. Lower Quartile c. Median d. Upper Quartile e. Maximum f. Range g. Mean h. Mode i. Standard deviation 2. Is the mean or median a better measure of...
*Monday, May 2, 2011 at 9:57pm by Anonymous*

**stats**

Why must you square the deviation scores when computing a standard deviation using the definitional formula? Why is the computational formula easier to use when computing variance and standard deviation?
*Tuesday, February 5, 2013 at 9:52pm by kelly*

**elementary statistics**

There are different ways you can do this kind of problem, but the formula below might be one of the easier ways: s/[1 + (1.645/√2n)] ..to.. s/[1 - (1.645/√2n)] ...where s = standard deviation, 1.645 represents the 90% confidence interval using a z-table, and n = ...
*Saturday, November 30, 2013 at 7:44pm by MathGuru*

**econ**

12) Suppose you know that the standard deviation of a variable is 10, and you have 100 observations, the standard deviation of the mean is
*Sunday, November 27, 2011 at 11:02pm by Alyson*

**math**

Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation to one decimal place. a. Mean b. Range c. Variance d. Standard deviation e. What value is affecting the mean ...
*Sunday, November 10, 2013 at 12:10pm by Anonymous*

**Statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size 3.
*Monday, November 15, 2010 at 5:28pm by Barbara*

**Statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
*Friday, November 19, 2010 at 2:08pm by Felicia*

**psy325**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3
*Wednesday, December 15, 2010 at 12:05am by smith*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size 3
*Monday, January 10, 2011 at 10:05pm by melissa*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
*Monday, January 24, 2011 at 2:16pm by kim*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
*Sunday, January 30, 2011 at 10:35pm by Anonymous*

**psychology**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size - (b) 3 ?.
*Sunday, February 13, 2011 at 10:35pm by net*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size - (b) 3 ?.
*Sunday, February 13, 2011 at 10:46pm by net*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3
*Monday, April 4, 2011 at 9:37am by amanda *

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
*Sunday, April 10, 2011 at 10:13pm by mama*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
*Thursday, May 12, 2011 at 7:20pm by Mae*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
*Monday, June 13, 2011 at 8:58pm by hope*

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size 3.
*Tuesday, June 14, 2011 at 1:30pm by Reba*

**Statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size: 3
*Monday, July 4, 2011 at 2:03am by Christy*

**statistics**

For a population that has a standard deviation of q0, figure the standard deviation of the distribution of means for samples of size-(a)2,(b)3,(c)4,(d)9.
*Wednesday, July 6, 2011 at 11:11pm by Dorothy*

**stATS**

the standard deviation of the sampling distribution of the means is ____the standard deviation of the population under study.
*Friday, November 4, 2011 at 5:15pm by tim*

**statistics**

what are the mean and standard deviation of a sampling distribution consisting of samples of size 16? these sameples were drawn from a population whose mean is 25 and who standard deviation is 5. a. 25 and 1.25 b. 5 and 5 c. 25 and 5 d. 5 and 1.25 e. 25 and square root of 5 ...
*Sunday, February 1, 2009 at 9:37pm by helga*

**stats**

does this formula look familar? z= (x-mean)/(standard deviation) Find the z-score that matches 4%. Then, plug in that for z. Finally, solve for standard deviation.
*Monday, September 24, 2007 at 9:38pm by Anonymous*

**statistics**

for a distribution standard deviation=10.If every item is increased by 2 then what will new standard deviation?
*Tuesday, September 27, 2011 at 10:07am by Anonymous*

**statistics**

for a distribution standard deviation=10.If every item is increased by 2 then what will new standard deviation?
*Tuesday, September 27, 2011 at 10:09am by ria*

**Statistics**

hi i need help calculating the standard error using the central limit theorem. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11, there are 5x5=25 samples of the two scores (n=2)* i already calculated the standard deviation and mean. for the question my ...
*Sunday, November 21, 2010 at 9:01pm by ash*

**Statistics**

How do you figure this out? For a population that has a standard deviation of 10, what is the standard deviation of the distribution of means for samples of size 2? A-6.33 B-7.07 C-2 D-3.03
*Friday, May 7, 2010 at 5:49pm by Amanda*

**Statistics**

find the 90% confidence interval for the variance and standard deviation of a sample of 16 and a standard deviation of 2.1 Assume the variable is normally distributed.
*Sunday, October 24, 2010 at 10:56pm by Anon*

**Psychology/Statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size - 3. Use the formula sqrt(N^ 2/S)
*Friday, July 15, 2011 at 9:36pm by Dawn*

**Chemistry/Normal Distributions/Math**

I'm confused on how to calculate the standard deviation for this... The 95% confidence limit for calcium in control sera is reported as 9.2-10.2 mg/dl. Calculate the value for one standard deviation and the coefficient of variation for this data.
*Monday, January 21, 2013 at 8:18pm by Maranda*

**standard deviation**

the mean is 3.5. dtandard deviation is .5. sally's score is 1.5 on test. how many standard deviations is she from the mean? billy scores 5. what is his standard score? what scale of measurement is being used? is it appropiate? why/why not?
*Wednesday, March 24, 2010 at 10:11am by dee*

**Statistics: Sample Size, Variance and Standard Dev**

Sample Size, Variance and Standard Deviation A student organization plans to ask 100 randomly selected students how much they spent on textbooks last semester. You argue for a sample of 900 students instead of 100. You know the standard deviation of the sample mean x of the ...
*Tuesday, September 11, 2007 at 4:26pm by Carma*

**Statistics & Probability**

You are correct. I also get 1.89 for the standard deviation. If the standard deviation were 2.50, only 67% of X numbers would be below 12.10
*Friday, January 4, 2013 at 6:57pm by drwls*

**stats**

A normal distribution is a distribution that is bell-shaped and symmetrical. The mean, median, and mode are measures of central tendency. In a normal distribution, all are the same value. Variance and standard deviation are two measures of variability. Standard deviation is ...
*Tuesday, October 23, 2012 at 4:46pm by MathGuru*

**College Chem**

Please tell me if this is correct...Finding the mean, the average deviation from the mean, the standard deviation from the mean, and the relative deviation from the mean...of 10.1, 10.4 and 10.6 Mean-10.4 Average deviation-0.167 Standard deviation-0.25 Relative deviation-2%
*Friday, March 19, 2010 at 3:44pm by London*

**statistics**

The "standard score" is more commonly called the "z-score". It is the number of "standard deviations" above the mean. The standard deviation is the square root of the variance, or 5 in this case. The number of data values is not needed to answer the question. A data point of ...
*Thursday, October 13, 2011 at 9:28am by drwls*

**Statistics **

9 points) In a normally distributed data set, find the value of the standard deviation if the following information is given. a. The mean is 226.2. x = 230. z = 0.2. Standard deviation
*Tuesday, April 1, 2014 at 10:18pm by Sarah Nichols*

**Math check**

Ok (23) I got the standard deviation as 1.99 and on (24) I got standard deviation as 0.73. I have worked and worked these and I am missing something if this is not right.
*Saturday, June 1, 2013 at 6:52pm by Nora 512*

**Statistics: Range, Average Deviation, Standard Dev**

Can someone please help me with the following math problems? I am totally lost and confused. Calculate the range, average deviation, and standard deviation for the following five distributions: A. 1, 2, 3, 4, 5, 6, 7, 8, 9 B. -4, -3, -2, -1, 0, 1, 2, 3, 4 C. 10, 20, 30, 40, 50...
*Tuesday, October 18, 2011 at 1:44am by Joy Chapman*

**statistics**

There is a tool for that sort of calculation at : http://easycalculation.com/statistics/standard-deviation.php The range is obviously 2 to 98 The mean is 58.56 The standard deviation is 32.35 The variance is the square of that
*Saturday, October 16, 2010 at 12:21am by drwls*

**statistics**

I'll explain 2 of these questions; see if you can figure out the other two. 4.1 The mean will be changed and the standard deviation will remain the same. There will be no change in standard deviation since each score and also the mean increase by constant K. 4.3 You can use ...
*Thursday, October 25, 2007 at 8:11pm by MathGuru*

**math**

I am not in agreement with Reiny's statement that the standard deviation of the weight of 12 eggs is 24. In my previous answer, sqrt(120) should have been sqrt(12), and my assumption for the standard deviation was based on that.
*Monday, October 8, 2007 at 9:54pm by drwls*

**Chemistry**

What is the difference between Residual Standard Deviation and Relelative Standard Deviation?
*Saturday, September 11, 2010 at 8:02pm by chloe*

**Chemistry**

What is the difference between Residual Standard Deviation and Relative Standard Deviation?
*Saturday, September 11, 2010 at 8:07pm by chloe*

**statistics**

it is stated that the standard deviation sample of the is 7.6 (n = 26). Test the claim to a significance level of 0.10 that the population standard deviation was greater than 7.0. Round all answers to 3 decimal places.
*Saturday, July 28, 2012 at 9:28am by geety*

**statistics**

it is stated that the standard deviation sample of the is 7.6 (n = 26). Test the claim to a significance level of 0.10 that the population standard deviation was greater than 7.0. Round all answers to 3 decimal places.
*Saturday, July 28, 2012 at 1:40pm by geety*

**Statictics**

For those samples, the rate is 19.2% for men and 16.7% for women. A higher rate for men is likley but no proven. You must also consider the sample size and standard deviation. If the male illiteracy probability were 19%, the expected standard deviation in the number of ...
*Monday, October 29, 2007 at 11:06pm by drwls*

**math**

Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation to one decimal place. a. Mean b. Range c. Variance d. Standard deviation e. What value is affecting the mean ...
*Friday, November 8, 2013 at 8:07pm by Anonymous*

**math**

Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation to one decimal place. a. Mean b. Range c. Variance d. Standard deviation e. What value is affecting the mean ...
*Friday, November 8, 2013 at 8:55pm by Anonymous*

**Statistics**

Given that x is a normally distributed random variable with a mean of 28 and a standard deviation of 7, find the following probability: P(x<28) I understand that the means is 28 and the standard deviation is 7. However what I don't understand is how to get the value of x. ...
*Tuesday, October 9, 2012 at 11:48am by Anonymous*

**standard deviation**

The Z score indicates standard deviations from the mean. It is accurate as long as the distribution is normal. Z = (score - mean)/standard deviation You can do the calculations.
*Wednesday, March 24, 2010 at 10:11am by PsyDAG*

**statistics**

Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation of 18. c. A score of 18 on a test with a mean ...
*Sunday, April 3, 2011 at 12:28pm by Charlie*

**statistics**

Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation of 18. c. A score of 18 on a test with a mean ...
*Sunday, April 3, 2011 at 3:25pm by Charlie*

**statistics**

find the probability that the sample mean falls between 1.6 and 2.2. what value will you now use for the standard deviation. (Find the standard error of the mean) Mean is 1.5 and standard deviation is .25
*Tuesday, October 12, 2010 at 8:13pm by Anonymous*

**Math (Statistics)**

In google type: wikipedia mean variance standard deviation When you see list of results click on pages in list. Then in google type: mathisfun Standard Deviation Calculator When you see list of results click on: mathsisfuncom/data/standard-deviation-calculator.html When page ...
*Monday, March 14, 2011 at 3:21pm by Anonymous*

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