Friday

July 31, 2015

July 31, 2015

Number of results: 33,204

**stats**

is there a good, relevant sites where i can get stats extra help?
*October 11, 2007 by Keirson*

**Statistics**

I need to do a project for ap stats. It can be anything im interested in, and i have to perform some tests and all that I need some ideas!! Somthing that would be interesting..
*May 28, 2008 by MJ*

**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**

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**

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

**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**

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*

**Stats**

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%?
*May 14, 2011 by Ana*

**Stats help!**

Does anyone know how to find the variance or something if only the correlation of something is given and the other way around?? I really need help with this! THANK YOU!
*April 6, 2009 by ash*

**Stats**

Could someone please explain to me how I would read a z table. I have a z score of 2.2 and I need to know what the percentages is. Then if I'm given 8% how do I find the z score?
*March 5, 2013 by Bonnie*

**Stats**

If the true population standard deviation was known to be 3, then approximately what minimum sample size would you need in an SRS (simple random sample) if you want a confidence interval for the margin of error of .5 or less?
*February 21, 2011 by Anonymous*

**Stats**

what are the upper and lower limits of the variable below? upper lower 15-19 60-69 * is there a formula i need to use for this.
*September 12, 2012 by Whitney*

**English**

I need help finding stats about saving money by using the online community for communication instead of in the actual community. How you save money by doing this
*February 25, 2012 by Anonymous*

**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*

**Debatind/ Sose**

please I really need statistics and exact examples for my debate. I can not go up there and say many people think we are too americanized. We won't win. Please give me some stats. and eg. on the topic "that australia is becoming too american" Thanks Minerva
*April 18, 2008 by Minerva*

**Questions about stats**

a non-directional hypothesis and have set your alpha at .01. You have 30 pairs of scores. What is the criterion value of r you need to equal or exceed to have a significant correlation so you can reject the null hypothesis
*July 24, 2013 by Qtexas*

**stats**

Three scholarships are available for needy students. Their values are $2,00, $2,400 and $3,000 12 students have applied and no student may receive more than one scholarship. Assuming all 12 students are in need of funds, how many different ways could the scholarship be awarded?
*March 16, 2011 by Maria B*

**stats**

a box contains 100 cards, of which 25 are numbered 1, 35 are numbered 2, 30 are numbered 3, 10 are numbered 4. One card will be drawn from the box and its number X observed. Give the probability distribution of X How in the world do I do this? do I have to manually get the ...
*February 16, 2007 by Anonymous*

**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*

**STATS**

Scientists wish to test the mind-readiing ability of a person who claims to have ESP. They use five cards with different and distinctive symbols( square, cicrle, triangle, line, squiggle). Someone picks a card at random and thinks about the symbol. The mind-reader must ...
*October 17, 2011 by JONATHAN*

**stats**

A human resources manager at a large company wants to estimate the proportion of employees that would be interested in reimbursement for college courses. If she wishes to be 95% confident that her estimate is within 5% of the true proportion, how many employees would need to ...
*April 15, 2010 by Chad*

**college,stats/ PLZ HELP:( need it within nxt 6hrs**

Among Canadian households, 24% have telephone answering machines. If a telemarketing company contacts 2500 households find the probability that between 625 and 650 households, inclusive, have answering machines.
*April 7, 2010 by Sandra*

**stats**

If SS = 50 and s^2 = 10, what is n?
*October 2, 2012 by eric*

**ap stats need help**

Continuous Random Variable, I Let X be a random number between 0 and 1 produced by the idealized uniform random number generator described. Find the following probabilities: a.P(0¡ÜX¡Ü0.4) b.P(0.4¡ÜX¡Ü1) c.P(0.3¡ÜX0.5) d.P(0.3(<X<0.5) e.P(0.226¡ÜX¡Ü0.713) f.What ...
*March 10, 2009 by chris*

**Stats**

Construct a scatterplot for the (x, y) values below, and answer the following questions. You do NOT need to submit your scatterplot with your answer; however, show all other work. x y 1 2.5 2 5.0 3 7.5 4 10.0 5 12.5 - What would be the slope of this regression line? - Would ...
*October 7, 2012 by Anonymous*

**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 ...
*April 25, 2008 by mathstudent*

**stats**

a door to door sales person for a household appliance has learned from her past experience that out of 10 demonstrations of her appliaance only 4 result in actual sales. This week she needs to make at least 5 sales. At least how many demonstrations does she need to perform to ...
*June 14, 2011 by jenny*

**stats**

a door to door sales person for a household appliance has learned from her past experience that out of 10 demonstrations of her appliaance only 4 result in actual sales. This week she needs to make at least 5 sales. At least how many demonstrations does she need to perform to ...
*June 14, 2011 by jenny*

**stats**

a door to door sales person for a household appliance has learned from her past experience that out of 10 demonstrations of her appliaance only 4 result in actual sales. This week she needs to make at least 5 sales. At least how many demonstrations does she need to perform to ...
*June 14, 2011 by jenny*

**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*

**mba stats class, help!!**

a door to door sales person for a household appliance has learned from her past experience that out of 10 demonstrations of her appliaance only 4 result in actual sales. This week she needs to make at least 5 sales. At least how many demonstrations does she need to perform to ...
*June 15, 2011 by jenny*

**Stats**

Employees in a large company are entitled to 15-minute water breaks. A random sample of the duration of water breaks for 10 employees was taken with the times shown as: 12, 16, 14, 18, 21, 17, 19, 15, 18, and 16. Assuming that the times are normally distributed at the 5% ...
*May 10, 2015 by Stat*

**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*

**Stats: need help please**

two golfers plan to enter a tournament where the score will be determined as a team score. golfer x has a mean score of 85.4 and St. Deviation of 3.2 while golfer y has a mean score of 89.6 and St. deviation of 4.1. what is their expected team score and the variation ...
*November 23, 2008 by Stephanie*

**Finance**

I need help on this study problem.----- A firm computes the probability distribution of possible net present values for a project and finds that it has an expected value of $125,000 and a standard deviation of $75,000. Assuming that the distribution of net present value is ...
*November 2, 2006 by Jenny*

**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*

**math stats**

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

**Stats**

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*

**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*

**Stats (Math)**

Assume that Science scores on a 25-point quiz for a random sample of 5 students were drawn from a normal population. The assumed variance was 20 while the recorded variances were: 18, 16, 10, 13, and 23. You suspected that the variance is actually higher. What test do you need...
*May 10, 2015 by Leeroy*

**Stats**

I just need help with starting how to calculate the problem I am so lost. A random sample of eight observations from the first population resulted in a standard deviation of 10. A random sample of six observations from the second population resulted in a standard deviation of ...
*December 6, 2010 by Yasmin*

**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**

A company wishes to make 1 ounce candy bars. According to government regulations, in order to label the candy bars as 1 ounce, at least 95 % of the bars must weigh 1 ounce or more. Our process standard deviation is .08 ounces. What do we need to make the mean weight be so that...
*October 29, 2014 by Alex*

**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/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*

**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 & 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**

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*

**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*

**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*

**NEED HELP PLZ!!! STATS**

Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this experiment is completed...
*October 23, 2011 by Jennifer*

**Biology and Graphing (Stats)**

i need to make a graph on excel.. my data involve putting goldfish (from the same tank and same type) into 3 different environments : acidic, neutral (control), and basic. What kind of graph should I use? just a line graph? but then what should my variables look like? the 3 ...
*March 24, 2010 by Carter*

**stats**

In order to improve the English speaking and reasing skills of their students, Jack Box Elementary assigns students whose native language is Spanish to a bilingual program for 8 week. To test the effectiveness of this program, then also need a control condition, in which the ...
*March 1, 2009 by ash*

**stats ?**

In order to improve the English speaking and reasing skills of their students, Jack Box Elementary assigns students whose native language is Spanish to a bilingual program for 8 week. To test the effectiveness of this program, then also need a control condition, in which the ...
*March 2, 2009 by ash*

**Stats II**

I have a question on a quiz and I dont even know where to begin on figuring out the question... please help: Measurements on the percentave of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows: 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 ...
*June 5, 2007 by Haley*

**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*