February 11, 2016

Search: stats

Number of results: 1,226

is there a good, relevant sites where i can get stats extra help?
October 11, 2007 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 ...
June 8, 2010 by kyuu09

So i have a test in stats tomorrow and im trying to work on my study guide but im stuck at this question : Construct a confidence interval for the proportion for each case 90 percent interval 861 out of 2500. please help.
October 19, 2014 by Jessica

Introduction programing visual basic
break even analysis. suppose a certain product sells for a dollars per unit. then the revenue from selling x units of the product is ax dollars if the cost of producting each unit of the product is b dollars and the company has overhead cost of c dollars then the total cost of...
March 4, 2015 by Caitlin

Introduction programing visual basic
break even analysis. suppose a certain product sells for a dollars per unit. then the revenue from selling x units of the product is ax dollars if the cost of producting each unit of the product is b dollars and the company has overhead cost of c dollars then the total cost of...
March 4, 2015 by Caitlin

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, ...
March 18, 2013 by Christina Ms Sue please help

If SS = 50 and s^2 = 10, what is n?
October 2, 2012 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...
May 4, 2011 by Anonymous

College Stats
Is .09 less than .05?
May 8, 2011 by Carol

given n=74 an x=32.find ^p and ^q
April 4, 2013 by Chris

if we reject the null hypothesis, we conclude that:
April 1, 2010 by Anonymous

Compute the following and show your steps 7! /5!.
August 7, 2010 by renae

what does it mean to say alpha is set at 0.5
August 18, 2011 by nicole

math stats
how do i draw a histogram for the data (8,0,7,5,5)
January 24, 2012 by juan777

What is the spread? How can it be found from a set of numbers?
March 6, 2012 by Jill

math stats
Calculate p ̅. x1 20 n1 50 x2 55 n2 100
June 22, 2013 by jerry

Which of the following numbers could be a proabilty of an event 0, 1.15, 0.03, -0.43, 1, 0.34
October 7, 2014 by Sarah

How do you find SSA, SSB & SSE??
November 18, 2014 by Morgan

A sample has a mean of M = 73 and a standard deviation of s = 5
June 18, 2015 by dj

how does one make a residual plot please?
November 16, 2007 by Anonymous

What are variance and covariance? What do they mean? What are their differences/relationship?
September 22, 2008 by Blake

what are some tricks that will; help me remember the stats and the capitles
February 23, 2010 by briana

Let z be a random variable with a standard normal distribution, P(-1.9<=z<=2.1)
July 24, 2010 by Clay

Mean is 60 and standard deviation is 7. what percentage is 73 and below.
October 12, 2010 by Christine

If a confidence interval for the mean is 24.8 < ě < 29.6. What is the margin of error?
November 1, 2010 by Erica

maths stats
Please unscramlbe aaeebllnn which is a name. Thanks
May 5, 2011 by orla

what is the range of data with a total of 1000 values?
September 4, 2011 by Ann james

what is the probability that a loaf of bread is between 22.75 and 23.00?
September 6, 2011 by tim

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

stats 250
A z-score of z = +3.00 indicates a location that is the following
June 6, 2013 by Anonymous

what is the lower and upper limit for -645.321?
February 6, 2015 by gisela

Explain what it means to have a deviation score of -18
September 8, 2015 by Matt

how do you construct a relative frequency table based on an ogive?
September 6, 2008 by arielle

How would r change if researchers had recordered the proportions?
February 6, 2009 by kate

if you know the mean and standard deviation, how do you determine the proportion that will and will not be included
November 4, 2012 by mary

what is the distinction between repeated measurements and matched items?
November 27, 2012 by jason

What percentage of the area of the standard normal distribution is between z = -1.00 and z = +1.00? How do you know this?
October 11, 2014 by Hernandez

can cholesterol follow a normal distribution exactly? why or why not?
October 17, 2014 by rebekah

does anyone know anyting about standard deviation... I have no idea what it is!
August 5, 2007 by Kaz

x and y independent exponential r.v with respctive parameters 2 and 3. find the cdf and density of z = x/y.
November 8, 2006 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
May 8, 2008 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)
March 26, 2009 by April

psy Stats.
how do you Calculate percentage when given standard deviation and mean
May 10, 2011 by Kailey

Can you tell me what ∑xy means? Like is in the sum of all x times y or what?
July 10, 2011 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
October 25, 2011 by Jen

if income in the us was normally distributed, what z-score would represent the top 1%?
October 31, 2011 by stacey

using a calculator need p value on a r tailed test if the n=9 and the t is 3.204
December 2, 2011 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.
November 27, 2012 by Georgia

Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13
April 2, 2013 by chris

What does the best estimate mean after doing the liner regression equation
May 6, 2013 by Anonymous

Stats help
What does the best estimate mean after doing the liner regression equation
May 7, 2013 by Anonymous

how to find the are for a standard normal curve that cuts off the upper 1.1%
November 17, 2013 by Anonymous

Need help finding the area under the normal curve between z = -1.0 and z = -2.0?
April 16, 2014 by Betty

what is the probability that a 6 digit phone number contains at least one 8?
July 19, 2014 by michelle

AP Stats
transformation necessary to linearize the data. Be sure to convince me that you understand.
August 10, 2014 by Hep

What is the best measure to describe the total variability in a population or sample?
March 11, 2015 by Dany

what does this mean i have to do this in a spreadsheet Descriptive stats for each numeric variable
September 13, 2015 by Anoymous

Where can I find fuel efficient car sales statistic for recent years?
October 25, 2007 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))
October 20, 2009 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
January 13, 2011 by Lauren

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

Find the probability that the company will meet its goal on a particular 50 miles of line
October 17, 2011 by Anonymous

What data and stats do you need to know in order to identify profitable nations in which to export.
October 5, 2012 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)
April 11, 2014 by Kelly

If a measured distribution has an average of 65 and a variance of 16 and the standard deviation of the random error is 4
September 9, 2014 by sas

(a) Suppose n = 26 and p = 0.30. Can we approximate p̂ by a normal distribution? Why? (Use 2 decimal places.)
October 6, 2014 by neyrod

7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.
February 15, 2015 by Anonymous

The heights of women in the US approximately follow a bell shaped curve. What do you think that means?
November 11, 2009 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
December 8, 2009 by Anonymous

Six letters are picked. Find the chance that they can be arranged to form the word RANDOM.
April 15, 2014 by Mario007

what are the mean and standard error when using central limit theorem for dichotomous variable
August 28, 2014 by mary

The probability that an observation, following a normal distribution, will lie within μ ± 1.3σ is a. 9.5 % b. 19.0% c. 40.3% d. 50.0% e. 80.6%
May 11, 2015 by meryy

Find the score that separates the top 75% from the bottom 25% if the Mean is 100 and the Standard deviation is 15
June 11, 2015 by cindy

Why is it important to know the possible errors we might make when rejecting or failing to reject the null hypothesis?
May 20, 2008 by Christine

FST (functions, stats, and trigonometry)
what is the equation for the axis of symmetry for the function f(x)=IxI?(absolute value)
October 7, 2009 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 ?
February 18, 2010 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
May 24, 2010 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 ?
February 26, 2011 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 ?
February 26, 2011 by Ruben

women age 20-29 is 36ml staandard deviation 7ml. What is probability greater than 45ml and between 30 and 62 ml
August 27, 2011 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.
July 17, 2012 by Anonymous

The following confidence interval is obtained for a population proportion, p:0.556 < p < 0.584. What is the point estimate, p?
September 30, 2012 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)
October 2, 2012 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
October 21, 2012 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.
November 17, 2012 by Marie

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

for a sample of n=20 how large a Pearson correlation is necessary to be statistically significant for a two tailed test
December 4, 2014 by Ivan

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?
July 4, 2010 by Anonymous

what is it called when all the items in the population have the same chance of being selected for the sample?
October 8, 2011 by Tim

a die is rolled three times. find the chance that not all the rolls show 3 or more spots
December 4, 2011 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.
October 7, 2012 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
November 5, 2012 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
January 1, 2013 by gary

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

If the effect size of a hypothesized phenomenon is .8, then how many subjects are needed to achieve .5 power? alpha = .05; two-tailed
April 23, 2015 by Anonymous

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...
July 12, 2013 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
December 9, 2009 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.
April 21, 2010 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.
September 25, 2010 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
August 31, 2011 by Tim

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