# Stats- NEED HELP

38,107 results

stats
is there a good, relevant sites where i can get stats extra help?

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..

stats
using a calculator need p value on a r tailed test if the n=9 and the t is 3.204

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

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 ...

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

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.

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%?

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!

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?

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?

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.

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

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...

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...

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

Prob & Stats
A medical researcher gave 100 patients a new drug to see if it reduces their blood pressure? Did the new drug reduce the patients' blood pressure? Write your hypothesis mathematically. Not sure how to do this, Prob & Stats has been quite a struggle for me

stats
It is a multiple choice exam with 12 problems, each problem has 5 options. You need to answer 10 correctly to pass, what is the probability that by guessing you will answer at least 10 problems correctly?

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

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?

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 ...

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 ...

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...

Stats
Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age with a mean of 93 seconds and a standard deviation of 16 seconds. Thus, 99.7% of running times are approximately between Need help

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 ...

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.

social studies
This is an essay I really need help on please. nation-state A and nation-state B share a border. The two nation-states are arguing over immigration policies regarding the border. What are two ways that the nation-stats could resolve their dispute?

healthcare stats
You currently lease scanning equipment at a cost of \$2,750 per quarter and two copy machines at \$150 each per month plus \$0.01 per page copied. You estimate you will copy a total of 30,000 pages a year per copier. What will you need to budget annually for this leased equipment?

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...

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

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 ...

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 ...

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 ...

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 ...

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 ...

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...

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 ...

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% ...

College Stats
Is .09 less than .05?

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

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 ...

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 ...

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...

stats
if we reject the null hypothesis, we conclude that:

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

stats
what does it mean to say alpha is set at 0.5

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

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

math stats
Calculate p ̅. x1 20 n1 50 x2 55 n2 100

Stats
Which of the following numbers could be a proabilty of an event 0, 1.15, 0.03, -0.43, 1, 0.34

Stats
How do you find SSA, SSB & SSE??

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

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 ...

stats
how does one make a residual plot please?

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

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

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

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

Stats
If a confidence interval for the mean is 24.8 < ì < 29.6. What is the margin of error?

maths stats
Please unscramlbe aaeebllnn which is a name. Thanks

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

bussi./stats
what is the probability that a loaf of bread is between 22.75 and 23.00?

STATS
If Ho: μ = 50 and Ha: mu. = 59 and s = 10 what is αlpha if x exceeds 56for n=25

stats 250
A z-score of z = +3.00 indicates a location that is the following

stats
what is the lower and upper limit for -645.321?

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

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...

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

stats
How would r change if researchers had recordered the proportions?

stats
if you know the mean and standard deviation, how do you determine the proportion that will and will not be included

stats
what is the distinction between repeated measurements and matched items?

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?

health/stats
can cholesterol follow a normal distribution exactly? why or why not?

Stats
let x be a binomial random variable with expected valuee 4 and variance 2 a) What is P(X=3)? b) What is P(X<6)?

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

stats
x and y independent exponential r.v with respctive parameters 2 and 3. find the cdf and density of z = x/y.

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

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)

psy Stats.
how do you Calculate percentage when given standard deviation and mean

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

Stats
Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.3 0.5 0.2

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

stats & prob.
Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.

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

stats
What does the best estimate mean after doing the liner regression equation

Stats help
What does the best estimate mean after doing the liner regression equation

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

stats
what is the probability that a 6 digit phone number contains at least one 8?

AP Stats
transformation necessary to linearize the data. Be sure to convince me that you understand.

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

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

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...

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 ...

Stats II
I have a question on a quiz and I don't 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...

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 ...

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 ...

Stats
Where can I find fuel efficient car sales statistic for recent years?

college Stats
If Y has a geometric distribution with success probability p, show that P(Y= an odd integer)= p/(1-(q^2))

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

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

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