Sunday

February 19, 2017
Number of results: 130,043

**stats**

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*

**Stats**

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*

**math stats**

how do i draw a histogram for the data (8,0,7,5,5)

*January 24, 2012 by juan777*

**math stats**

Calculate p ̅. x1 20 n1 50 x2 55 n2 100

*June 22, 2013 by jerry*

**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*

**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...

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

**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

*October 17, 2011 by julia42*

**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

*August 5, 2007 by Kaz*

**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.

*March 3, 2010 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.

*March 3, 2010 by mike*

**Stats**

About 10% of the population of a large country is math phobic. If two people are randomly selected what is the probability both are math phobic? And hat is the probability that at least one is math phobic? Any way to do this on stat crunch?

*October 11, 2015 by Michelle*

**Math: Chi Squared**

I typed my observed values into the matrix and went to stats, tests, c:,.. Enter.. But the TI-83 says Error:domain How can I fix this?

*November 13, 2014 by Anonymous*

**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?

*February 6, 2010 by Patty*

**Math/Stats**

The average monthly attendance to the senior citizen bowling league is 67 with a stdev of 6.5. What is the probability that a randomly selected day will see between 72 and 78 visitors?

*April 6, 2016 by Max*

**math (stats)**

Find the z scores that separate the middle 59% of the distribution from the area in the tails of the standard normal distribution.

*October 12, 2015 by bee*

**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

*January 24, 2012 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.

*March 28, 2012 by Apryl*

**math/stats**

What is the standard deviation of a $1 bet on any one particular number, e.g., 33, in the game of American roulette? Notice the payoff is 35:1 for this type of bet.

*September 2, 2014 by Justin*

**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

*July 18, 2010 by thara*

**stats**

If SS = 50 and s^2 = 10, what is n?

*October 2, 2012 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...

*May 4, 2011 by Anonymous*

**College Stats**

Is .09 less than .05?

*May 8, 2011 by Carol*

**stats**

given n=74 an x=32.find ^p and ^q

*April 4, 2013 by Chris*

**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

*July 27, 2012 by Brittany*

**stats math**

Suppose Ray makes 85% of his free throws. What is the probability that Jordan will make 2 free throws in a row?

*November 26, 2012 by denise*

**stats**

if we reject the null hypothesis, we conclude that:

*April 1, 2010 by Anonymous*

**stats**

Compute the following and show your steps 7! /5!.

*August 7, 2010 by renae*

**stats**

what does it mean to say alpha is set at 0.5

*August 18, 2011 by nicole*

**Stats**

What is the spread? How can it be found from a set of numbers?

*March 6, 2012 by Jill*

**Stats**

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*

**Stats**

How do you find SSA, SSB & SSE??

*November 18, 2014 by Morgan*

**stats**

A sample has a mean of M = 73 and a standard deviation of s = 5

*June 18, 2015 by dj*

**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.

*February 21, 2011 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.

*February 21, 2011 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?

*November 26, 2012 by denise*

**math-stats**

There are 40 items in which 8 are defective. if 6 items are selected at random, what is the probability that 4 are non defective?

*March 20, 2016 by *

**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?

*October 28, 2008 by Sara*

**stats**

how does one make a residual plot please?

*November 16, 2007 by Anonymous*

**Stats**

What are variance and covariance? What do they mean? What are their differences/relationship?

*September 22, 2008 by Blake*

**geography**

what are some tricks that will; help me remember the stats and the capitles

*February 23, 2010 by briana*

**stats**

Let z be a random variable with a standard normal distribution, P(-1.9<=z<=2.1)

*July 24, 2010 by Clay*

**stats**

Mean is 60 and standard deviation is 7. what percentage is 73 and below.

*October 12, 2010 by Christine*

**Stats**

If a confidence interval for the mean is 24.8 < ì < 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*

**Stats**

what is the range of data with a total of 1000 values?

*September 4, 2011 by Ann james*

**bussi./stats**

what is the probability that a loaf of bread is between 22.75 and 23.00?

*September 6, 2011 by tim*

**STATS**

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*

**stats**

what is the lower and upper limit for -645.321?

*February 6, 2015 by gisela*

**Stats**

Explain what it means to have a deviation score of -18

*September 8, 2015 by Matt*

**Stats**

You have many old textbooks in your apartment. You have 6 math books, 7 econ, and 4 accounting. Assume that each textbook is different than the other. A) What is the probability that the last book is one of the economic textbooks? B) What is the probability that none of the ...

*September 9, 2014 by Rebekah*

**stats**

how do you construct a relative frequency table based on an ogive?

*September 6, 2008 by arielle*

**stats**

How would r change if researchers had recordered the proportions?

*February 6, 2009 by kate*

**stats**

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*

**stats**

what is the distinction between repeated measurements and matched items?

*November 27, 2012 by jason*

**STATS**

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*

**health/stats**

can cholesterol follow a normal distribution exactly? why or why not?

*October 17, 2014 by rebekah*

**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 ...

*July 2, 2009 by Sophie*

**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?

*January 24, 2008 by Danielle*

**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

*October 15, 2011 by Jennifer*

**stats**

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*

**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

*May 8, 2008 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)

*March 26, 2009 by April*

**psy Stats.**

how do you Calculate percentage when given standard deviation and mean

*May 10, 2011 by Kailey*

**Stats**

Can you tell me what ∑xy means? Like is in the sum of all x times y or what?

*July 10, 2011 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

*October 25, 2011 by Jen*

**stats**

if income in the us was normally distributed, what z-score would represent the top 1%?

*October 31, 2011 by stacey*

**stats**

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*

**stats**

Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13

*April 2, 2013 by chris*

**stats**

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*

**stats**

how to find the are for a standard normal curve that cuts off the upper 1.1%

*November 17, 2013 by Anonymous*

**Stats**

Need help finding the area under the normal curve between z = -1.0 and z = -2.0?

*April 16, 2014 by Betty*

**stats**

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*

**Stats**

What is the best measure to describe the total variability in a population or sample?

*March 11, 2015 by Dany*

**statistics**

what does this mean i have to do this in a spreadsheet Descriptive stats for each numeric variable

*September 13, 2015 by Anoymous*

**Stats -Math**

1. We are interested in conducting a study in order to determine what percentage of voters of a state would vote for the incumbent governor. What is the minimum size sample needed to estimate the population proportion with a margin of error of 0.05 or less at 95% confidence? ...

*December 12, 2016 by Lauren*

**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?

*January 23, 2012 by dan*

**Stats**

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*

**stats**

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

*March 13, 2011 by Lillie*

**stats**

Find the probability that the company will meet its goal on a particular 50 miles of line

*October 17, 2011 by Anonymous*

**business**

What data and stats do you need to know in order to identify profitable nations in which to export.

*October 5, 2012 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)

*April 11, 2014 by Kelly*

**stats**

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*

**stats**

(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*

**stats**

7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.

*February 15, 2015 by Anonymous*

**Stats**

The probability that the twelve graduates will have a mean salary over $50,000 is...

*February 17, 2016 by Josh`*

**Stats**

What types of bias could be in a survey asking students how many classes they take per semester? Thanks -MC

*September 2, 2016 by mysterychicken*

**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.

*August 11, 2013 by Sean*

**math/stats**

A hamburger chain found that 65% of all customers use mustard, when they buy hamburgers. If 5 customers randomly selected, what is the probability that none use mustard?

*June 25, 2016 by Carly*

**Stats**

The heights of women in the US approximately follow a bell shaped curve. What do you think that means?

*November 11, 2009 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

*December 8, 2009 by Anonymous*

**Stats**

Six letters are picked. Find the chance that they can be arranged to form the word RANDOM.

*April 15, 2014 by Mario007*

**stats**

what are the mean and standard error when using central limit theorem for dichotomous variable

*August 28, 2014 by mary*