Thursday

April 24, 2014

April 24, 2014

Number of results: 88,322

**stats**

is there a good, relevant sites where i can get stats extra help?
*Thursday, October 11, 2007 at 7:45pm by Keirson*

**C++ Programming**

Design and create a class named Stats that has an array of 12 doubles as one of its member variables. The values in the array should be set by making 12 calls to a public member function named setValue that accepts two arguments, an integer indicating which value is being ...
*Tuesday, June 8, 2010 at 4:25pm by kyuu09*

**math stats**

how do i draw a histogram for the data (8,0,7,5,5)
*Tuesday, January 24, 2012 at 6:27pm by juan777*

**math stats**

Calculate p ̅. x1 20 n1 50 x2 55 n2 100
*Saturday, June 22, 2013 at 6:12pm by jerry*

**math stats**

A true-false test consists of 50 questions. how many does a student have to get right to convince you that he is not merely guessing Explain
*Monday, October 17, 2011 at 7:35pm by julia42*

**bus. stats**

Given that math SAT scores are normally distributed (follow the empirical rule) m=500 Standard deviation=100 what is the math SAT score for someone who is in the 80th percentile of his or her class.
*Wednesday, March 3, 2010 at 2:37pm by mike*

**bus. stats**

Given that math SAT scores are normally distributed (follow the empirical rule) m=500 Standard deviation=100 what is the math SAT score for someone who is in the 80th percentile of his or her class.
*Wednesday, March 3, 2010 at 2:37pm by mike*

**stats**

Use this z-score formula for this problem: z = (x - mean)/(sd/√n) x = 1.25, 1.50 mean = 1.35 sd = 0.25 n = 40 Calculate two z-scores, then use a z-table to determine probability between the two scores. I hope this will help get you started. •stats. - Christina, Monday, ...
*Monday, March 18, 2013 at 10:01pm by Christina Ms Sue please help*

**Math/Statistics**

does anyone know anyting about standard deviation... I have no idea what it is! http://en.wikipedia.org/wiki/Standard_deviation http://www.robertniles.com/stats/stdev.shtml
*Sunday, August 5, 2007 at 12:23pm by Kaz*

**math/stats**

If you square a correlation coefficient and subtract this number from 1.00, what is the result? Is it the coefficient of determination?
*Saturday, February 6, 2010 at 5:01pm by Patty*

**math(stats)**

sample of n=5 scores (8,0,7,5,5) make an estimate of the standard deviation by finding average distance of the smallest and largest distance from the mean
*Tuesday, January 24, 2012 at 5:22pm by juan777*

**Math Stats**

A random sample of 30 plants has a sample standard deviation of 3.4 days for maturity. A 95% confidence interval for the population variance is __ to __days.
*Wednesday, March 28, 2012 at 12:51pm by Apryl*

**stats math**

Suppose x is normally distributed with a mean of 130 and a standard deviation of 25. Twenty-six percent of the values are less than what value? 123.5 114 136 146
*Sunday, July 18, 2010 at 4:57pm by thara*

**stats**

If SS = 50 and s^2 = 10, what is n?
*Tuesday, October 2, 2012 at 8:17am by eric*

**Stats**

A certian company enjoyed 3.5% profits in year 1 over its revenue in Year 0. In Year 2, it enjoyed 5.75% profits over Year 1. In Year 3, it posted 1.25% profits over Year 2. What single, constant profit over this period of years would have produced the same profit? The teacher...
*Wednesday, May 4, 2011 at 7:47am by Anonymous*

**Math- STATS 218**

When the following hypotheses are being tested at a level of significance of aH0: m 100 Ha: m < 100 the null hypothesis will be rejected if the test statistic Z is a. >Z b. >Z c. <Z d. <100
*Friday, July 27, 2012 at 1:03am by Brittany*

**College Stats**

Is .09 less than .05?
*Sunday, May 8, 2011 at 11:46pm by Carol*

**stats**

given n=74 an x=32.find ^p and ^q
*Thursday, April 4, 2013 at 1:11am by Chris*

**stats math**

Suppose Ray makes 85% of his free throws. What is the probability that Jordan will make 2 free throws in a row?
*Monday, November 26, 2012 at 9:51pm by denise*

**Math, Stats**

the probability is 0.6 that a person shopping at a certian store will spend less than $20. For group of size 19, find the mean number who spend less then $20.
*Monday, February 21, 2011 at 1:20am by Olivia*

**Math, Stats**

the probability is 0.6 that a person shopping at a certian store will spend less than $20. For group of size 19, find the mean number who spend less then $20.
*Monday, February 21, 2011 at 1:20am by Olivia*

**stats math**

Suppose that two cards are randomly selected from a standard 52-card deck. What is the probability that the first card is a spade and the second card is a space if the sampling is done without replacement?
*Monday, November 26, 2012 at 10:47pm by denise*

**Math (Stats)**

Explain some of the obstacles to trying to build a sampling distribution through repeated samples, even with software. The only obstacle I can think of is that it is time consuming and it could be expensive...are there other obstacles?
*Tuesday, October 28, 2008 at 6:17pm by Sara*

**stats**

if we reject the null hypothesis, we conclude that:
*Thursday, April 1, 2010 at 6:58am by Anonymous*

**stats**

Compute the following and show your steps 7! /5!.
*Saturday, August 7, 2010 at 12:41pm by renae*

**stats**

what does it mean to say alpha is set at 0.5
*Thursday, August 18, 2011 at 4:23pm by nicole*

**Stats**

What is the spread? How can it be found from a set of numbers?
*Tuesday, March 6, 2012 at 11:46pm by Jill*

**Stats**

Suppose the correlation between SAT Verbal scores and Math scores is 0.57 and that these scores are normally distributed. If a student's Verbal score places her at the 90th percentile, at what percentile would you predict her Math score to be?
*Thursday, January 24, 2008 at 5:55pm by Danielle*

**stats**

how does one make a residual plot please?
*Friday, November 16, 2007 at 12:16am by Anonymous*

**Stats**

What are variance and covariance? What do they mean? What are their differences/relationship?
*Monday, September 22, 2008 at 3:39pm by Blake*

**geography**

what are some tricks that will; help me remember the stats and the capitles
*Tuesday, February 23, 2010 at 6:29pm by briana*

**stats**

Let z be a random variable with a standard normal distribution, P(-1.9<=z<=2.1)
*Saturday, July 24, 2010 at 4:29pm by Clay*

**stats**

Mean is 60 and standard deviation is 7. what percentage is 73 and below.
*Tuesday, October 12, 2010 at 10:00am by Christine*

**Stats**

If a confidence interval for the mean is 24.8 < ě < 29.6. What is the margin of error?
*Monday, November 1, 2010 at 12:59pm by Erica*

**maths stats**

Please unscramlbe aaeebllnn which is a name. Thanks
*Thursday, May 5, 2011 at 1:09am by orla *

**Stats**

what is the range of data with a total of 1000 values?
*Sunday, September 4, 2011 at 1:36pm by Ann james*

**bussi./stats**

what is the probability that a loaf of bread is between 22.75 and 23.00?
*Tuesday, September 6, 2011 at 12:14pm by tim *

**STATS **

If Ho: μ = 50 and Ha: mu. = 59 and s = 10 what is αlpha if x exceeds 56for n=25
*Friday, March 15, 2013 at 10:42am by KP*

**stats 250**

A z-score of z = +3.00 indicates a location that is the following
*Thursday, June 6, 2013 at 9:03pm by Anonymous*

**Math-stats**

The playing times of 20 songs on a top-hits radio station are recorded in the chart below. Playing Time (minutes:seconds) 3:32 3:24 2:54 3:07 4:52 3:45 2:39 3:09 3:34 3:26 3:35 4:17 4:03 3:52 5:10 4:59 3:07 4:00 3:07 2:56 In a histogram of this data, which bar would have the ...
*Thursday, July 2, 2009 at 2:17pm by Sophie*

**Stats**

A Math test has a mean of 51 and standard deviation of 5.0. Find the corresponding z scores for: I. a test score of 64 II. a test score of 47
*Saturday, October 15, 2011 at 12:23pm by Jennifer*

**stats**

how do you construct a relative frequency table based on an ogive?
*Saturday, September 6, 2008 at 3:39pm by arielle*

**stats**

How would r change if researchers had recordered the proportions?
*Friday, February 6, 2009 at 11:05pm by kate*

**stats**

if you know the mean and standard deviation, how do you determine the proportion that will and will not be included
*Sunday, November 4, 2012 at 3:05pm by mary*

**stats**

what is the distinction between repeated measurements and matched items?
*Tuesday, November 27, 2012 at 4:53pm by jason*

**stats**

A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 69?
*Monday, January 23, 2012 at 10:03pm by dan*

**Math/Statistics**

A statistics teacher believes that the final exam grade for her elementary stats class have a normal distribution with a mean of 82 and a standard deviation on 8. Find the score which separates the top 10% of the scores from the lowest 90% of the scores.
*Sunday, August 11, 2013 at 8:51pm by Sean*

**stats**

x and y independent exponential r.v with respctive parameters 2 and 3. find the cdf and density of z = x/y.
*Wednesday, November 8, 2006 at 11:55pm by ripa*

**stats**

find standard deviation for this problem daily precip- frequency-31,1,0,2,0,1 0.oo-0.49 0.50-0.99 1.00-1.49 1.50-1.99 2.00-2.29 2.50-2.99
*Thursday, May 8, 2008 at 12:30am by ebony*

**Stats**

If X is a normal random variable with mean 60, and a standard deviation of 2, find: A: P (X<58) B: P(X>63) C: P(57<X<64)
*Thursday, March 26, 2009 at 3:41pm by April*

**psy Stats.**

how do you Calculate percentage when given standard deviation and mean
*Tuesday, May 10, 2011 at 5:56pm by Kailey*

**Stats**

Can you tell me what ∑xy means? Like is in the sum of all x times y or what?
*Sunday, July 10, 2011 at 5:28pm by Carol*

**Stats**

Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.3 0.5 0.2
*Tuesday, October 25, 2011 at 8:37pm by Jen*

**stats**

if income in the us was normally distributed, what z-score would represent the top 1%?
*Monday, October 31, 2011 at 6:49pm by stacey*

**stats**

using a calculator need p value on a r tailed test if the n=9 and the t is 3.204
*Friday, December 2, 2011 at 2:11pm by James *

**stats & prob.**

Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.
*Tuesday, November 27, 2012 at 3:21pm by Georgia*

**stats**

Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13
*Tuesday, April 2, 2013 at 12:33am by chris*

**stats**

What does the best estimate mean after doing the liner regression equation
*Monday, May 6, 2013 at 9:11pm by Anonymous*

**Stats help**

What does the best estimate mean after doing the liner regression equation
*Tuesday, May 7, 2013 at 10:56am by Anonymous*

**stats**

how to find the are for a standard normal curve that cuts off the upper 1.1%
*Sunday, November 17, 2013 at 8:43pm by Anonymous*

**Stats**

Need help finding the area under the normal curve between z = -1.0 and z = -2.0?
*Wednesday, April 16, 2014 at 4:15pm by Betty*

**Stats**

Where can I find fuel efficient car sales statistic for recent years?
*Thursday, October 25, 2007 at 6:34pm by eason*

**college Stats**

If Y has a geometric distribution with success probability p, show that P(Y= an odd integer)= p/(1-(q^2))
*Tuesday, October 20, 2009 at 11:13pm by james*

**stats help!**

What 2 numbers is the emperical rule of 95% between if the P of no shows is .10 and the average party size is 10
*Thursday, January 13, 2011 at 5:04pm by Lauren*

**stats**

What are the steps to solve P(x>k)=.025 when the mean is 500, standard deviation is 100
*Sunday, March 13, 2011 at 8:19pm by Lillie*

**stats**

Find the probability that the company will meet its goal on a particular 50 miles of line
*Monday, October 17, 2011 at 10:15pm by Anonymous*

**business**

What data and stats do you need to know in order to identify profitable nations in which to export.
*Friday, October 5, 2012 at 2:53am by Lisa*

**Stats. **

Find the standard normal area for each of the following, showing your reasoning clearly. a. P(1.22<z<2.15) b. P(2.00<z<3.00) c. P(-2.00<z<2.00) d. p(z=0.50)
*Friday, April 11, 2014 at 11:02am by Kelly*

**Stats Repost**

Your mathematics instructor claims that, over the years, 88% of his students have said that math is their favorite subject. In this year's class, however, only 21 out of 32 students named math as their favorite class. The teacher decides to conduct a test of the hypothesis H0...
*Monday, December 17, 2012 at 12:01pm by Oops*

**stats**

SAT math scores approx. follow a normal distribution, with mean 500 and standard deviation 100. What % of students should have an SAT math score above 500? I think I use mean (500) + z-score * SD (100), but I do not know how to get the z-score?
*Monday, September 28, 2009 at 3:49pm by CM*

**Stats**

The heights of women in the US approximately follow a bell shaped curve. What do you think that means?
*Wednesday, November 11, 2009 at 11:37pm by Sam*

**STATS**

A student's grade on an examination was transformed to a z value of 0.67. Therefore, we know that she scored approximately in the top
*Tuesday, December 8, 2009 at 11:03pm by Anonymous*

**Stats**

Six letters are picked. Find the chance that they can be arranged to form the word RANDOM.
*Tuesday, April 15, 2014 at 7:14am by Mario007*

**MATH 15 Stats**

simple random sample of 50 women on new product of the 50 women, 60% reported they like the new product, fina a 90% confidence interval for the true proportion of women.
*Wednesday, April 13, 2011 at 2:41pm by Vicky *

**Math Stats**

Chris is shopping for CDs and decides to purchase 3 movie soundtracks. The store has 9 different movie sountracks in stock. How many different selections of movie sountracks are possible?
*Wednesday, September 19, 2012 at 11:49am by Chris*

**Math/Stats **

I have like 9 more of these problems, can someone please help me out so I can get started. thanx JS In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviation was $775. Construct a 90% confidence interval for this. Assume the annual...
*Wednesday, May 1, 2013 at 10:35am by Jessica*

**Stats**

Why is it important to know the possible errors we might make when rejecting or failing to reject the null hypothesis?
*Tuesday, May 20, 2008 at 9:29am by Christine*

**FST (functions, stats, and trigonometry)**

what is the equation for the axis of symmetry for the function f(x)=IxI?(absolute value)
*Wednesday, October 7, 2009 at 9:05pm by Jared*

**Stats**

A testing service has 1000 raw scores. It wants to transform the distribution so that the mean =10 and the standard deviation = 1. To do so ?
*Thursday, February 18, 2010 at 4:52pm by Z*

**Algebra 2: Prob and Stats**

Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625
*Monday, May 24, 2010 at 7:07pm by Skye*

**Stats**

In a distribution of scores with a mean of 234 and a standard deviation of 47, what is in the 43rd percentile ? and what formula do i use ?
*Saturday, February 26, 2011 at 12:29am by Ruben*

**Stats**

In a distribution of scores with a mean of 234 and a standard deviation of 47, what is in the 43rd percentile ? and what formula do i use ?
*Saturday, February 26, 2011 at 12:29am by Ruben*

**stats**

women age 20-29 is 36ml staandard deviation 7ml. What is probability greater than 45ml and between 30 and 62 ml
*Saturday, August 27, 2011 at 6:05pm by anna*

**Stats**

Five measurements are taken and are 59.5", 61.33", 60.55", 61.00", 59.8". Find the likely size of the chance error in a single measurement.
*Tuesday, July 17, 2012 at 10:06pm by Anonymous*

**STATS**

The following confidence interval is obtained for a population proportion, p:0.556 < p < 0.584. What is the point estimate, p?
*Sunday, September 30, 2012 at 9:22pm by 1234*

**stats**

1. Find the sample variance and standard deviation 6, 53,11,49,35,26,28,28,31,31 s squared = (round to the nearest hundredth as needed)
*Tuesday, October 2, 2012 at 6:31pm by pat*

**stats**

if x is a normally distributed random variable with amean of 8.00 if the proability for x is less than 9.54 is 0.67, then find the standard deviation of x
*Sunday, October 21, 2012 at 9:35am by tamara*

**Stats**

Suppose X is a uniform random variable with C = 20 and d = 90. Find the probability that a randomly selected observation is between 23 and 85.
*Saturday, November 17, 2012 at 3:14pm by Marie*

**stats**

X is normally dsitributed with mean 250 and standard deviation 40. what value of X does only top 15% exceed?
*Monday, March 24, 2014 at 6:14am by Anonymous*

**Math**

Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly appreciated
*Wednesday, February 3, 2010 at 9:17pm by Ted*

**math**

I've finished studying a full textbook on linear algebra and another on statistics. I've done most of the practice problems and I understand everything covered in these books very well. But I need to know more. Specifically, I'd like to understand more about: - Gauss Markov ...
*Friday, April 25, 2008 at 8:13pm by mathstudent*

**stats**

Assume that aset of test scores is normally distributed with a mean of 100 and a standard deviation of 20 use the 68-95-99?
*Sunday, July 4, 2010 at 3:25pm by Anonymous*

**buss/stats**

what is it called when all the items in the population have the same chance of being selected for the sample?
*Saturday, October 8, 2011 at 6:46pm by Tim*

**Stats**

a die is rolled three times. find the chance that not all the rolls show 3 or more spots
*Sunday, December 4, 2011 at 5:55pm by Fay*

**stats**

. Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.4 0.25 0.35 Please show all of your work.
*Sunday, October 7, 2012 at 9:47am by Anonymous*

**Stats**

If X and Y are uncorrelated in the population, the expected value of the estimated linear regression coefficient (slope) is 0. True False
*Monday, November 5, 2012 at 10:33am by Mickie*

**stats**

if i have a sample size of 200, 16% are poor, what is my mean and standard deviation. my answers do not make any sense
*Tuesday, January 1, 2013 at 8:42pm by gary*

**stats**

explain and give example for each of the following types of variables: (a) equal-interval, (b) rank-over, and (c) nominal
*Monday, September 2, 2013 at 9:28pm by lucy*

**math (stats)**

A biology professor gives a surprise quiz consist of a true/false question followed by a multiple choice question with four possible answers. If both questions are answered with random guesses, find the probability that both responses are correct. Please show your work.
*Monday, January 23, 2012 at 12:30am by juan777*

**college stats**

Again sorry for all the questions. please help, I am not good at stats and find these questions very difficult. I would appreciate an explanation if possible. 1.What is the sample average? 2.What is the SD of the box? 3.What is the number of draws from the box (the sample size...
*Friday, July 12, 2013 at 6:36pm by penelope*

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