# Stats- NEED HELP

38,212 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 ...

### business

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

### Stats in need of help

Assume that you entered a drawing to win one of 35 movie tickets. If only 650 people enter the drawing, determine the probability of winning (round your answer to three decimal places)

### 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?

### stats need help

If all the values in a data set are converted to z-scores, the shape of the distribution of the z-scores will not be the same as the distribution of the original data. True or False?

### 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

### 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

### 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 ...

### 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 need help

Use the empirical rule to solve the problem. The systolic blood pressure of 18 yr. old women is normally distributed with a mean of 120 mmHg (millimeters of Mercury) and a standard deviation of 14 mmHg. What is the percentage of 18 yr. old women that have a systolic blood ...

### 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 ...