April 24, 2014

Search: stats ?

Number of results: 1,001

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

does anyone know anyting about standard deviation... I have no idea what it is!
Sunday, August 5, 2007 at 12:23pm by Kaz

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

. 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

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

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

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

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

Prob and Stats
In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56
Wednesday, December 9, 2009 at 4:10pm by please help!

The scores on a mathematics exam have a mean of 65 and a standard deviation of 7. Find the x-value that corresponds to the z-score 1.645.
Wednesday, April 21, 2010 at 9:40am by Isa

three children in a class of 16 are being given awards. how many possible ways are there to pick winners if each prize is different.
Saturday, September 25, 2010 at 9:22pm by cb

business and stats
What type of data is the projected return on an investment? Qualitative , continous, attribute,discrete or none of the above
Wednesday, August 31, 2011 at 4:39pm by Tim

if one can choose any six of 40 numbers, in any order, to play a state lottery game, how many different arrangments are possible?
Sunday, February 26, 2012 at 12:41am by tim

What is the minimal sample size needed for a 99% confidence interval to have a maximal margin of error of 0.06 if there is no preliminary estimate for p?
Sunday, July 8, 2012 at 10:57pm by Lynn

n a study using 15 respondents and in which the population variance is unknown, what distribution should be used to calculate the confidence interval.
Sunday, September 2, 2012 at 8:52pm by Anonymous

A class of 85 students writing an exam had a mean mark of 74.2 write down the total sum of the 85 grades.
Wednesday, September 26, 2012 at 6:04pm by Rachael

identify what is the 95 percent confidence interval for upper class respondents, give you have known their mean=15.34, standard deviation=3.48,and cases=38
Monday, April 4, 2011 at 8:18pm by Nancy

stats homework help
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 7:26pm by julia42

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

Determine the standard error of the mean if a random sample of 52 is pulled from a population with µ = 82 and ó = 18. Round your answer to two decimal places
Friday, November 4, 2011 at 1:23pm by Anonymous

A set of LSAT scores follows the normal curve. The average is 560, and the standard deviation is 60. Find the 80th percentile.
Saturday, July 7, 2012 at 6:35pm by sheri

A two-tailed test is conducted at the 5% significance level. What is the right tail percentile required to reject the null hypothesis?
Saturday, September 1, 2012 at 11:29pm by Anonymous

A two-tailed test is conducted at the 5% significance level. What is the right tail percentile required to reject the null hypothesis?
Sunday, September 9, 2012 at 5:31am by Courtney

elementary stats
A binomial random variable is based on n = 28 and p = 0.7. Find x2P(x). (Give your answer correct to two decimal places.) 1
Saturday, March 30, 2013 at 4:15pm by Toni

How do I sketch distributions? I think I'm doing it wrong. Is there an option my friends stats-calc(her calcultor is very tempremental, so i don't know if it'll work) I can utiilzie that'll sketch things for me? thanks. -Sketch a normal distribution with (mu) m =80 and ...
Wednesday, January 30, 2008 at 6:27pm by Gloria

What is the interdecile range of the following: X Percentile 107 10th 114 25th 118 50th 122 75th 129 90th
Friday, January 22, 2010 at 11:58am by KLM

Between 11 P.M. and midnight on Thursday night, Mystery Pizza gets an average of 4.2 telephone orders per hour. Find the probability that,
Friday, October 8, 2010 at 1:12am by mnmn

Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9
Saturday, October 15, 2011 at 12:24pm by Jennifer

What critical t value would be needed to construct a 90% confidence interval on a sample of size 22? 1.717 1.323 2.080 1.321 1.721
Sunday, November 4, 2012 at 11:47am by etwetw

All the following are measures of variability or dispersion within a set of data except? range, median, standard deviation, variance
Saturday, April 13, 2013 at 2:31pm by Linda

Angela is conducting a poll on campus to determine the next student representative. How many students does she need to sample for a confidence level of 90% with a margin of error of + or - 5%?
Saturday, May 14, 2011 at 9:45pm by Ana

Given that a sample is approximately bell-shaped with a mean of 60 and a standard deviation of 3, the approximate percentage of data values that is expected to fall between 54 and 66 is 75% 95% 68% 99.7%
Saturday, March 3, 2012 at 8:26pm by Ashley

In a qualitative study, which of the following is mostly likely to appear as an outcome of the study?
Sunday, February 3, 2013 at 8:40pm by Anonymous

Does the regression line equation change if you change the independent and dependent variable
Monday, May 6, 2013 at 9:23pm by Anonymous

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