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April 20, 2014

Search: statistic & probability

Number of results: 11,355

statistics
The p-value is the actual level of the test statistic. It represents the probability of getting a result as extreme as the test statistic itself. To determine this probability, use a z-table with the z-values given.
Monday, September 13, 2010 at 1:41pm by MathGuru

writing
A)The date and source of the statistic B)What population(s) the statistic represents C)The author responsible for the statistic or quotation
Thursday, May 10, 2012 at 12:21pm by Anonymous

pROBABILITY AND STATISTIC..HELP...................
a missile protection system consists of n radar sets operating independently each with probability .9 of defecting an aircraft entering a specified zone.all radar sets cover the same zone.if an airplane enters the same, find the probability that it will be detected if n=2 and n=4
Tuesday, February 26, 2013 at 2:58am by Rrjey

pROBABILITY AND STATISTIC..HELP...................
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .05 * .02 = ?
Wednesday, January 30, 2013 at 8:49pm by PsyDAG

writing
When citing statistics from a web page in your speech you need to provide which of the following: ALL The date and source of the statistic What population(s) the statistic represents The author responsible for the statistic or quotation
Thursday, May 10, 2012 at 12:21pm by Anonymous

statistic and probability
a disk drive is randomly selected from 50 available disk drives, of which five are defective. What is the probability that it is not defective?, hope you answer this, thanks! :)
Thursday, September 20, 2012 at 1:45am by nitz

statistic
Roll two 6-sided dice and examine their sum. a) How long will it take to roll "snake-eyes" (a pair of ones)? b) What is the probability of rolling a sum of 7 on the first roll? c) What is the probability of rolling a sum of 7 on the fourth roll? d) What is the probability of ...
Tuesday, April 1, 2014 at 2:55pm by Bill

Math Help
Poll of statistic students revealed that 44% study alone, 31% study in a group, 12% study both alone and in a group Find the probability that a randomly selected statistic student studies alone but not in a group.
Wednesday, October 17, 2007 at 8:39pm by Taylor

statistic and probability
45/50 = ?
Thursday, September 20, 2012 at 1:45am by PsyDAG

pROBABILITY AND STATISTIC..HELP...................
please answer
Wednesday, January 30, 2013 at 8:49pm by Rrjey

Statistics
MathGuru, /**** statistic. Otherwise, check a z-table for a one-tailed test at .05 level of significance. Compare to your test statistic. If the test statistic exceeds the value from the table, reject the null and conclude p < .90. If the test statistic does not exceed the ...
Friday, April 20, 2012 at 7:20pm by Srinivas

statistic
How can the probability distribution of prices of new cars be described
Wednesday, September 21, 2011 at 10:57am by Simone

statistic
How can the probability distribution of prices of new cars be described
Wednesday, September 21, 2011 at 11:01am by Simone

statistic
This is a binomial distribution with parameters n=3 (number of trials in the experiment) p=1/2 (probability of boys, X) q=1-p (probability of girls) For a random variable X with a binomial distribution (n,p,q), then E(x)=μ=np σ²=npq where σ=standard ...
Tuesday, August 20, 2013 at 4:35pm by MathMate

statistic
A die is rolled once. The probability of obtaining an odd number is
Saturday, January 15, 2011 at 11:31am by natasha

statistic
A coin is tossed 6 times. Find the probability that all 6 tosses are tails.
Wednesday, November 13, 2013 at 8:48am by Michaela

statistic
You draw one card from a shuffled standard deck or cards (cards are in four suits-red diamonds, red heart, black clubs and black spades-and are numbered 2,3,4,5,6,7,8,9,10, J,O,K,A). A.What is the probability of drawing a red card B.What is the probability of drawing a queen c...
Friday, March 14, 2014 at 4:23pm by Helen

statistic
You draw one card from a shuffled standard deck or cards (cards are in four suits-red diamonds, red heart, black clubs and black spades-and are numbered 2,3,4,5,6,7,8,9,10, J,O,K,A). A.What is the probability of drawing a red card B.What is the probability of drawing a queen c...
Sunday, March 16, 2014 at 3:33pm by HELEN

statistic
It is a described as a probability distribution function. Are you looking for something else? (Broken Link Removed)
Wednesday, September 21, 2011 at 11:01am by bobpursley

statistic
based on 125 flights, 76% arrive on time. whats the probability that 80 flights arrive on time, probability that 20 or less flights are late?
Wednesday, November 23, 2011 at 6:27pm by mark

Statistic
If you roll a die 35 times and 7 of the rolls result in a "5," what empirical probability was observed for the event "5"?
Tuesday, September 18, 2012 at 6:18pm by Bibi

STATISTIC
IT IS IMPOSSIBLE TO GET 7 KINGS WHEN SELECTIONG CARDS FROM A SHUFFLED DECK. EXPRESS THE INDICATED DEGREE OF LIKELIHOOD AS A PROBABILITY VALUE BETWEEN 0 AND 1 INCLUSIVE.
Saturday, June 1, 2013 at 2:19pm by MAXINE

statistic
Assuming the 6 questions are independent, n=6 (questions) p=probability of guessing the right answer (1/5) x=exactly the number of successes over the 6 questions (2). Look up the appendix table, or the Excel function to calculate the probability. Alternatively, use the formula...
Saturday, December 4, 2010 at 11:16pm by MathMate

statistic
If you make a table for all the combinations of rolling dice you will notice that there are 6/36 possible ways to roll a sum greater than a nine. You are going to roll the dice 3 times and you do not want the sum of greater than 9 on the first 2 rolls but you do want a sum ...
Saturday, January 15, 2011 at 11:31am by Learning in Progress

College and Math Courses
Is statistic 243 equivalent to AP Statistic?
Friday, November 15, 2013 at 6:56pm by Anonymous

Psychology
ask how the statistic was calculated and what data the statistic is based upon.
Tuesday, April 23, 2013 at 4:11pm by shep

Statistic
6.16 Calculate each binomial probability: a. X = 2, n = 8, đ = .10 b. X = 1, n = 10, đ = .40 c. X = 3, n = 12, đ = .70 d. X = 5, n = 9, đ = .90
Friday, August 27, 2010 at 1:05pm by Kim

Animal Science
I need a statistic of how many dogs and cats are currently in a foster home in the us. Does anyone know a website that has this credible statistic? thanks
Wednesday, November 30, 2011 at 7:34pm by hannah

statistic
on a test midterm exam each multiple choice question provides five possible answers. what is the probability of randomly guessing three consecutive questions correctly?
Saturday, December 4, 2010 at 11:16pm by Anonymous

statistic math
it is known that 5% of all parts manufactured at Plant F are defective. If 30 part are randomly selected what is the probability that all 30 parts are not defective and what is the probability that at least one of the 30 parts is defective?
Thursday, July 22, 2010 at 3:20pm by alexis

statistics
Try a one-sample t-test to determine your test statistic. Once you have the test statistic, compare the test value to the critical value from a t-table using degrees of freedom along with the significance level. If the test statistic exceeds the critical value from the table, ...
Tuesday, August 2, 2011 at 1:01pm by MathGuru

Math
I'm really stuck on these STATS questions.Can someone please help! 1. The probability of a car in a population having faulty brakes is .05. If we take a sample of 150 cars, find the standard deviation of the sampling distribution. 2. The strength of ten I-beams produced in a ...
Thursday, June 20, 2013 at 4:53pm by mysterychicken

statistic
roll 2 standard dice and add the numbers. what is the probability of getting a number larger than 9 for the first time on the third roll?
Saturday, January 15, 2011 at 11:31am by linn

statistic & probability
How many 5 digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6 if repeition are not allowed. do i use 7P5? since i am choosing 5 numbers from 7 and they can't be repeated?
Thursday, June 14, 2012 at 12:33am by Anonymous

statistic
Given a normal population with ě = 40 and ó = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?
Wednesday, March 9, 2011 at 10:06pm by kim

statistic & probability
No You have 6 possible appetizers, then 11 different main courses , followed by 5 different desserts that would be 6x11x5 or 330
Wednesday, June 13, 2012 at 9:59pm by Reiny

Statistic
An airline experiences a no-show rate of 6%. What is the maximum number of reservations that it could accept for a flight with a capacity of 160, if it wants the probability of accommodating all reservation holders to be at least 95%.
Friday, January 25, 2013 at 12:50pm by Anonymous

statistics
I need so help figuring out which statement is true or false. 1. A parameter always describes a larger group than a statistic. 2. The sampling distribution of a statistic is the distribution of values taken by the statistic in all possible samples of all possible sizes from ...
Thursday, February 5, 2009 at 10:44pm by Sue

Statistic
Below are listed the numbers of doctors in various specialties by gender. Pathology Pediatric Psychiatry Male 12,575 33,020 27,803 Female 5,604 33,351 12,292 Choose 1 doctor at random. (a) Find the probability of choosing a Pathologist or a female? b.) Find the probability of ...
Sunday, March 24, 2013 at 9:41pm by Bella

statistic homework
suppose that a detective file in new orleans has 63 current unsolved murders. what is the probability that at least 35 of the victims knew their murders
Wednesday, July 10, 2013 at 12:41pm by rissa

Statistics
How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling distributions? A. They help us to measure or estimate of the likelihood of a certain statistic falling within the class bounds. B. They help us visualize the ...
Sunday, September 26, 2010 at 6:55pm by Randy

statistic & probability
An order of ward presentation has been devised for seven people: Jeff, Karen, Lyle, Maria, Norm, Olivia, and Paul. How many ways can the men be presented first and then the women?
Thursday, June 14, 2012 at 4:25pm by Anonymous

Probability
I will let a = 1/175,711,536= 5.591145*10^-9 , to save typing. The expected number, among 200,000,000, is L = 2*10^8 a = 1.13823 The probability of P(k) of k winners is given by Poisson statistics: P(k) = L^k*e^-L/k! Probability of 0 winners = 0.32039 Probability of 1 winner...
Tuesday, March 18, 2008 at 4:38am by drwls

statistic
You can probably use a one-sample proportional test for your data. (Test sample proportion = 20/55 or .36) Find the appropriate table for your critical value at .10 level of significance for a one-tailed test. Compare the test statistic you calculate to the critical value from...
Tuesday, August 2, 2011 at 12:40am by MathGuru

Statistic
It is not mentioned that the distribution is normal. We will assume that it is, either by assumption, or by an approximation using the central limit theorem (which preferably applies to samples of 30+). With the assumption, we can see that the variance is σ²/n=0.4&...
Sunday, August 12, 2012 at 8:35pm by MathMate

Statistics
Use the z-test formula to find the test statistic: z = (sample mean - population mean)/(standard deviation divided by the square root of the sample size) Plug the values given into the formula to calculate your z-test statistic. Since the H1 shows a specific direction, this ...
Saturday, March 13, 2010 at 8:59pm by MathGuru

statistics
Here are a few hints: 1. Try an independent groups t-test to calculate the t-test statistic. 2. Degrees of freedom for an independent groups t-test is this: n1 + n2 - 2 3. Compare your test statistic to the critical values listed. If the test statistic exceeds the critical ...
Thursday, January 17, 2013 at 7:03pm by MathGuru

Statistic
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 21/35 * 20/34 = ?
Sunday, March 24, 2013 at 9:35pm by PsyDAG

statistics
Use the appropriate statistical formula for this type of 2-sample test. Calculate the test statistic using the information in the problem. Find your critical value using the appropriate table at .05 level of significance for a one-tailed test. Compare your test statistic to ...
Thursday, February 16, 2012 at 8:18pm by MathGuru

Statistics
The p-value is the probability of the observed statistic given the null hypothesis is true. A) True B) False False?
Monday, November 4, 2013 at 4:59pm by Penny

statistic
3 statistics professors and 7 chemistry professors are available to be advisors.If each professor has an equal chance of being selected, what is the probability that both professors are cgemistry professors?
Wednesday, November 13, 2013 at 8:52am by Michaela

statistic
a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 175 and a standard deviation of 15. if an applicant is randomly selected, find the probability of a rating that is between 150 and 200
Friday, April 27, 2012 at 8:40pm by charmaine

statistics/probability
1. The probability that a student passes mathematics is 2/3 and the probability that he passes biology is 4/9. If the probability of passing one course is 4/5, what is the probability that he will pass both courses?
Saturday, October 23, 2010 at 5:30pm by Anonymous

Statistic
If a person told you what month he was born, would it be unusual to guess the date of his birth ( not including the year)? Justify your answer. (Note: An event is to be considered "unusual" if its probability is less than or equal to 0.05.)
Monday, October 1, 2012 at 4:21pm by Anonymous

Statistic
You can use a one-sample proportional z-test for your data. (Test sample proportion = 39/90 and sample size = 90) Convert fractions to decimals to use in the z-test. Find the critical value in the appropriate table at .05 level of significance for a two-tailed test. Compare ...
Monday, July 9, 2012 at 10:41pm by MathGuru

statistic
For a two-tailed hypothesis test, the test statistic is z = 1.42. What is the p-value?
Tuesday, October 29, 2013 at 9:17pm by Anonymous

Statistic
There are a total of 41 males and 50 females. The probability of picking two females a row (if each can be picked only once) is (50/91)x(49/90) = 0.2991
Sunday, August 24, 2008 at 11:02pm by drwls

Statistics
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 449 babies were born, and 250 of them were girls. Use the sample data with .01 significance level to test the claim that with this method, the probability of a baby being a...
Tuesday, November 26, 2013 at 6:03pm by Help Please!

statistics
1. True. Parameters are data from the total population, while statistics are data from samples. 2. True. A sampling distribution is the probability distribution, under repeated sampling of the population, of a given statistic (a numerical quantity calculated from the data ...
Thursday, February 5, 2009 at 10:44pm by PsyDAG

statistic
A multiple-choice test has 48 questions, each with four response choices. If a student is simply guessing at the answers, a. What is the probability of guessing correctly for any question? b. On average, how many questions would a student get correct for the entire test? c. ...
Sunday, January 27, 2013 at 2:10am by Nickie

pROBABILITY AND STATISTIC..HELP...................
A small store installed a diesel-powered generator for emergency power outage because they function independently of electric power. The past history of the town indicates that on about 5% of days during summer the town loses electricity due to high winds. However, high winds ...
Wednesday, January 30, 2013 at 8:49pm by Rrjey

statistics
The below table shows the probabilities generated by rolling one die 50 times and noting the up face. What is the probability of getting an odd up face? roll 1 Probability 0.22 roll2 probability 0.10 roll 3 probability 0.18 roll 4 probability 0.12 roll 5 probability 0.18 roll ...
Thursday, May 3, 2012 at 8:05pm by sc

Statistics
To do inferential procedures comparing two proportions, we need another variance formula (our ruler). This formula is based on what principle? A) The variance of the difference of two statistics is the difference of the variances of each statistic. B) The variance of the ...
Friday, November 15, 2013 at 7:30pm by Katie

statistic & probability
You have 6 choices for the first digit, which cannot be zero, six for the second digit (which can be zero), five for the third digit, then four and then 3. That makes 6*6*5*4*3 = 2160 possibilities
Thursday, June 14, 2012 at 12:33am by drwls

statistic
a roulette wheel has alternating red and black numbered slots in one of which the ball finally stops to determine the winner. It gambler always bets on black to win. What is the probability at least 24 times in a series of 36?
Sunday, January 27, 2013 at 2:11am by wanda

statistic
Quiz has 6 questions. Each question has five possible answers, only one of each 5 answers is correct. If student randomly guesses on all six questions, what is the probability to answer 2 questions right? Tip: first, you have to define parameters of Binomial distribution: n - ...
Saturday, December 4, 2010 at 11:16pm by tanya

statistic help please
2. A survey of 259 families was made to determine their vacation habits. The two way table below sorts the families by location and the vacations by the length of the vacation. Rural Suburban Urban Total 1–7 days 80 39 37 156 8ormore days52 32 19 103 Total 132 71 56 259 What ...
Sunday, March 16, 2014 at 5:34pm by shantel

Statistic
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores. This is simple enough that the approximation could be memorized.
Friday, May 31, 2013 at 7:41pm by PsyDAG

statistic
a. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. b, c. Same process.
Sunday, January 27, 2013 at 2:10am by PsyDAG

statistic
In order to attract customers, an ice cream company has started a STAR game. Any person who collects four stars gets a free family size bucket of ice cream. Suppose that the probability of an ice cream pack contains a star is 0.3 (an ice cream pack cannot contain more than one...
Monday, October 24, 2011 at 1:14pm by anrt

Stats
2 samples were collected to determine whether there was a difference between two weight loss methods targeting men. The average weight loss method is provided for the 2 samples along with the respective standard deviations. Is the second method - with an average weight loss of...
Friday, February 23, 2007 at 4:33pm by Jason L

statistic
how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?
Wednesday, December 15, 2010 at 12:42am by smith

Statistic
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z scores.
Friday, February 1, 2013 at 10:58pm by PsyDAG

math
A statistic professor plans classes so carefully that the lengths of her classes are uniformly distributed between 46.0 and 56.0 minutes. Find the probability that a given class period time is less than 51.75 minutes
Friday, November 29, 2013 at 10:46am by jamie

Statistic 103
The average teachers salary in Connecticut( ranked first among states) is $57,337. suppose that the distribution of salaries is normal with a standard deviation of $7500. What is the probability that a randomaly selected teacher makes less than $52,000 per year?
Wednesday, April 13, 2011 at 11:12am by Jennifer

math probability
this is a probability question... Suppose you are asked to choose a whole number between 1 and 13 inclusive. (a) what is the probability that it is odd?...7/13 (b) What is the probability that it is even?...6/13 (c) what is the probability that it is a multiple of 3?...4/13 (d...
Thursday, December 18, 2008 at 12:22am by joe

Statistic
In a jar there 12 white balls 8 red balls 4 greens all with the same size if a person selects one ball at random find the probability it is a red ball.
Monday, March 18, 2013 at 10:34pm by Morena

Statistic
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 4/52 * (4-1)/52-1) * (4-2)/(52-2) = ?
Saturday, April 12, 2014 at 4:11pm by PsyDAG

Statistic
A urn contains 21 red balls, 14 white balls If we randomly select 2 balls, one after the other without replacement, what is the probability that both of the balls selected are red?
Sunday, March 24, 2013 at 9:35pm by Bella

Math
In an experiment, the probability of the event E is known to be .4. Also the probability of the event F is .8,and the probability of E∪F is 1. i) Compute the probability of these events: P(E∩F)= P(E-F)= ii) Suppose the experiment is run twice in succession. What ...
Thursday, April 21, 2011 at 6:55pm by Tracy

statistics
if n units are independent and the probability of each being up is 2/3 then the probability of all n being up is (2/3)^n HOWEVER I can not see your flow chart and therefore can not evaluate parallel paths if there are two ways to get from A to B and the probability of failure ...
Monday, February 17, 2014 at 8:34pm by Damon

statistic
Z = (score-mean)/SD Solve for scores of 116 and 108. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores.
Thursday, November 8, 2012 at 12:40am by PsyDAG

Statistic
Under 20 21-30 31-40 Male 12 12 17 Female 13 16 21 If two people are selected at random, what is the probability they are both female?
Sunday, August 24, 2008 at 11:02pm by Angela

statistic
If 55% of a television viewing population watched a program called ˇ§Name that Poemˇ¨ one evening, what is the probability that, in a random sample of 100 viewers, less than 50% of the sample watched the program?
Saturday, April 7, 2012 at 12:04pm by Nancy

statistic homework
If 55% of a television viewing population watched a program called ˇ§Name that Poemˇ¨ one evening, what is the probability that, in a random sample of 100 viewers, less than 50% of the sample watched the program?
Wednesday, April 4, 2012 at 12:41pm by Nancy

statistic
Given TWO SETS of congruent angles, what is the probability of selecting two consecutive angles that are congruent?
Wednesday, December 3, 2008 at 12:30am by mitch

statistic
I a 3 team league the teams play each other once per year. Team A won 3 over a 2 year period. Team B won 4 and Team C won 5 What is the probability of Team wining all two games next season
Wednesday, February 19, 2014 at 3:22am by chris

Finite Math
An urn contains sixteen red balls and seventeen white balls. A sample of three balls is selected at random and the number of red balls observed. Determine the probability distribution for this experiment: Number of Red Balls/Probability 0...Probability=? 1...Probability=? 2......
Thursday, April 5, 2012 at 12:28am by Amanda

Business Statistic
X f(x) 0 .25 1 .20 2 .15 3 .30 4 .10 Is it prpbsbility distribution valid? Explain and list the requirement for a valid probability distribution Calculate the expected value x Calulate the variance of x calculate the standard deviation of x
Saturday, October 16, 2010 at 7:33pm by Laverne

math statistic
The Chicago Public School system has about 680 schools. About 130 of the schools will be closed. If five schools are chosen at random find the probability that at least 3 of them will be closed.
Wednesday, April 3, 2013 at 3:51pm by Evie

math-probability
The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
Monday, November 30, 2009 at 6:55pm by GG

Statistics
You can use a one-sample proportional z-test for your data. (Test sample proportion = 24/200 and sample size = 200) Convert all fractions to decimals. Find the critical value in the appropriate table at .01 level of significance for a two-tailed test. Compare the test ...
Thursday, July 19, 2012 at 10:57am by MathGuru

statistic
will you help with my statistic class
Friday, December 13, 2013 at 9:05pm by Patricia

hypothesis statistic
how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score. Respond to at least two of your fellow students’ postings.
Wednesday, December 15, 2010 at 12:41am by smith

statistics
solve this math statistic problem: an insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?
Sunday, March 24, 2013 at 11:54am by Anonymous

algebra 2
What you are being asked is what is the probability of getting 3 and 5 or two 4s on the next roll. On the second problem, the probability of getting a 3 is 1/6 and "anything else" is 1. With the information below, you should be able to calculate the probability of a pair of 3s...
Tuesday, March 10, 2009 at 9:40am by PsyDAG

Math
The probability of a head on each toss = .5 or 1/2. The probability of getting a 4 is 1/6. The probability of all the events occurring is found by multiplying the probability of the individual events — 2 coin tosses and one roll of the die. I hope this helps. Thanks for asking.
Wednesday, June 17, 2009 at 8:33pm by PsyDAG

Math Probability
If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments
Monday, April 16, 2012 at 2:03pm by Antonio

Statistics
This appears to be a hypothesis test involving inferences concerning two variances. Sample 1 (Girls): n = 21; variance = 100; df = n - 1 = 20 Sample 2 (Boys): n = 25; variance = 169; df = n - 1 = 24 Test statistic = sample 1 variance / sample 2 variance You can use the F-...
Monday, January 27, 2014 at 10:22am by MathGuru

statistical psychology
You might try a one-way ANOVA on this data. Use the appropriate table to compare your test statistic to the critical value from the table at .05 level of significance. If the test statistic exceeds the critical value from the table, reject the null and conclude a difference. ...
Tuesday, August 17, 2010 at 12:46pm by MathGuru

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