Sunday

April 20, 2014

April 20, 2014

Number of results: 11,748

**Help Math**

incorrect. Law of addition: P(A or B) = P(A)+ P(B)- P(A and B) source: http://www.quickmba.com/stats/probability/
*Sunday, December 30, 2012 at 7:50pm by TutorCat*

**stats-probability**

Zero, since the integrated (cumulative) probability of receiving less rain is one.
*Friday, January 21, 2011 at 1:01am by drwls*

**Probability & Stats**

what is the probability that no two students will have the same birth date in a size of 60 class
*Thursday, February 17, 2011 at 4:12pm by Apple*

**elementary stats**

Find P(0), P(1), and P(2). Add together for your probability. You can use a binomial probability table to determine each of the probabilities.
*Thursday, February 23, 2012 at 11:04pm by MathGuru*

**IGNOU probability**

Make a Venn diagram. 5% fail math only 25% fail both 10% fail stats only 60% pass both. Of the 30% (of all students) who failed math, 5/6 of that group (25% of all students)failed stats also. That is a conditional probability of 83.3%. Only 16.7% of the math-failing group pass...
*Friday, October 15, 2010 at 6:10am by drwls*

**Probability and Stats**

A graduate class consists of six students. What is the probability that exactly three of them are born either March, June or November?
*Wednesday, August 8, 2012 at 10:29am by Lori*

**probability and statistics**

We haven't a clue about which stats book you're using. Plus -- most of us don't have multiple stats book here at home. With 41 numbers, 12.3 is the top of the 30th percentile.
*Wednesday, September 10, 2008 at 6:44pm by Ms. Sue*

**Stats/ Probability**

Probability of NOT getting a 1 = 5/6, getting a 1 = 1/6. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. For five tosses: (5/6)^4 * 1/6 = ?
*Sunday, September 29, 2013 at 9:20pm by PsyDAG*

**stats**

Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still operating with a probability of 0.70 and has failed with a probability of 0.30. What is the probability that fewer than 40 batteries will last at least 8...
*Sunday, March 10, 2013 at 8:45am by cate*

**Stats**

easy to say they do not happen 1-pA = .6 1-pB = .5 so probability that neither happens is .3 so probability that at least one happens is 1-.3 = .7
*Saturday, March 29, 2014 at 10:07am by Damon*

**Probability and Stats**

Out of six students, we need exactly 3 fit the criteria of being born in 3 months out of 12, i.e. with probability p=3/12=0.25. Since the probability is assumed constant throughout, and we know the total number of students, we can use the binomial distribution, where n=6 x=3 p...
*Wednesday, August 8, 2012 at 10:29am by MathMate*

**problem stats**

an instant lottery game gives you probability .02 of winning on any one play. Plays are indpendent of each other. If you play 5 times, what is the probability that you win at least once.
*Monday, October 15, 2007 at 5:15pm by Kate*

**problem stats**

an instant lottery game gives you probability .02 of winning on any one play. Plays are indpendent of each other. If you play 5 times, what is the probability that you win at least once.
*Monday, October 15, 2007 at 8:29pm by Kate*

**Prob&stats**

Even = 10/20 over 14 = 6/20 Since 3 numbers are duplicated (in both categories), that probability needs to be subtracted. Either-or probability is sum of the individual probabilities.
*Wednesday, February 29, 2012 at 9:24am by PsyDAG*

**Stats**

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of Z = -1.77. Is the probability in the smaller area < .05?
*Thursday, April 17, 2014 at 10:23pm by PsyDAG*

**Stats**

a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there will be more than 2?
*Thursday, January 24, 2008 at 11:03am by MoJo*

**stats-probability**

thank you
*Friday, January 21, 2011 at 1:01am by joy*

**Stats**

The probability that Jack plays guitar on a raining day is 0.6 and on a sunny day is 0.5. The probability that is rains tomorrow is 0.8. Find the probability that Jack will not play guitar tomorrow.
*Saturday, February 8, 2014 at 4:08pm by Ashley*

**stats**

The probability of receiving a false positive on a mammogram is 7%. If the patient receives 10 mammograms in her lifetime what is the probability that none of the tests come back as a false positive?
*Saturday, April 17, 2010 at 9:43pm by kathryn*

**stats**

The easiest way to do this is use a binomial probability function table. You will need to determine n, x, and p. I'll give you a hint: x = 0. Once you determine P(0), then subtract the probability you find in the table from 1. That value will be your answer.
*Tuesday, November 15, 2011 at 9:01pm by MathGuru*

**bus stats**

a. I don't know what X signifies. b. First find the probability of two aces, then 3 non-aces. (4/52)(3/51)(48/50)(47/49)(46/48) = ? c, d. Use similar to process above. e. At least one ace = 1, 2, 3, or 4 aces. Use answers from b and c, plus calculate probability of 3 aces and ...
*Friday, March 25, 2011 at 3:12pm by PsyDAG*

**Stats (probability)**

(i) Choosing the first girl with blue eyes = 3/10. Since there is no replacement, the probability of the second girl having blue eyes = 2/9. The probability of both/all occurring is found by multiplying the individual probabilities. (ii) Do similar process with non-blue ...
*Wednesday, March 16, 2011 at 12:17am by PsyDAG*

**Stats**

The first thing you have to do is find the z score. z=(20.75-22)/.5 The z would be -2.5 Then, to find the probability, you can use your graphing calculator. Hit 2nd, then catalog, then go down to normalpdf. When that comes up, plug in -2.5 and it should give you a probability ...
*Tuesday, March 30, 2010 at 6:32pm by Ashley *

**PROBABILTY-STATS HELP**

A product is assembled from 3 components X,Y,Z and the probability of these components being defective is 0.01, 0.02,0.05. i have to find the probability that the assumed product will not be defective? can someone explain to me, how do it? thanks
*Thursday, April 5, 2012 at 8:07am by Taskeen*

**stats probability**

help please! A IRS auditor randomly selects 3 tax returns from 53 returns of which 13 contain errors. what is the probability that she selects none of those errors?
*Monday, April 12, 2010 at 9:21pm by anonymous*

**stats**

For a normal population with µ = 100 and σ = 20: 1. What is the probability of a particular score being greater than 110? 2. What is the probability of a particular score being less than 50?
*Tuesday, October 23, 2012 at 4:46pm by Komal*

**Stats ~ Please Help **

I am so lost and I have test tomorrow. Thank you to anyone who can help The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have...
*Tuesday, April 30, 2013 at 11:10am by Dave*

**Stats**

Fortunately, plane crashes are rare events. Suppose that commercial crashes occur on an average (mean) of 1.1 per year (Hint: Poisson). a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there will be more than ...
*Thursday, January 24, 2008 at 11:03am by MoJo*

**Stats**

The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have blue eyes c. Find the probability that one of the three has blue eyes
*Tuesday, April 30, 2013 at 11:10am by Dave*

**Stats**

Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.3 0.5 0.2
*Tuesday, October 25, 2011 at 8:37pm by Jen*

**Stats**

The probability of a child getting coal in their stocking is 0.2. If Santa visits 3 kids on Christmas day a) what is the probability of 2 children getting coal? b) 1 or fewer children receiving coal? Please help me - my brain is fried!
*Wednesday, December 4, 2013 at 12:00am by Wanda*

**Stats**

Probability of zero = 1.1^0 e^-1.1 / 0! = (1/1 )e^-1.1 = .332 of 1 = 1.1^1 (.332)/1! = .365 of 2 = 1.1^2 (.332)/2! = .201 The sum of the probabilities of zero, 1 and 2 is .898 SO, the probability of more than two is 1 - .898 = .102 ten percent. That is scary.
*Thursday, January 24, 2008 at 11:03am by Damon*

**Stats**

Suppose that you are in a class of 31 students and it is assumed that approximately 10% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed. (b) Compute the probability ...
*Sunday, February 16, 2014 at 2:22pm by Kay*

**college Stats**

If Y has a geometric distribution with success probability p, show that P(Y= an odd integer)= p/(1-(q^2))
*Tuesday, October 20, 2009 at 11:13pm by james*

**stats again**

ok I get it, so once I get the prob figred for one person, how do I figure it if additional attempts are made and the question is about the prob of at least one of the additional attempts say n = 6 getting the same results as the first Once you have the probability of passing ...
*Thursday, July 5, 2007 at 7:38pm by holly*

**STATS**

a woman standing on a bridge overlooking a major insterstate wants to know how likely it is that the next 20 out of 50 cars that pass under the bridge are red cars, if she has observed in the past that the probability than any given car on that interstate highway is red is ...
*Wednesday, May 25, 2011 at 9:47am by Mattie*

**Prob/Stats**

I beg to differ from Visper. Probability of having a correct address is (95/100). So, probability of correct 12 in a row (or none incorrect) is (95/100)^12 = .54 So, probability of having AT LEAST one incorrect = 1-.54 = .44 Probability of having exactly one incorrect is 12C1...
*Tuesday, October 20, 2009 at 7:18pm by economyst*

**Stats**

The number of failures of a testing instrument from contamination particles on the product is a Poisson random variable with a mean of 0.028 failure per hour. (a) What is the probability that the instrument does not fail in an 8-hour shift? (b) What is the probability of at ...
*Tuesday, February 25, 2014 at 10:27pm by Ashley*

**stats**

Use normal approximation(Z-score for p-hat) to find the probability that student scores 80% or lower on a 100 question quiz. A)If the test contains 250 questions, what is the probability that student will score 80% or lower
*Thursday, July 14, 2011 at 1:58am by Ryan*

**Stats**

Expected number is .1*1000 = 100 SD is sqrt(n*p*q) = 1000*.1*.9 = 9.49 90 is 10 away from the mean and 10/9.48= 1.05 standard deviations away. Your stats book should have a cumulative normal distribution table. look up 1.05. I get .8531. Ergo, the probability of seeing more ...
*Friday, March 20, 2009 at 5:23pm by economyst*

**This is a conditional probability problem - needs help**

I will get my book out but perhaps a stats teacher can help before I get at it.
*Friday, January 2, 2009 at 2:39pm by Damon*

**bussi./stats**

what is the probability that a loaf of bread is between 22.75 and 23.00?
*Tuesday, September 6, 2011 at 12:14pm by tim *

**stats**

Find the probability that the company will meet its goal on a particular 50 miles of line
*Monday, October 17, 2011 at 10:15pm by Anonymous*

**stats**

Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13
*Tuesday, April 2, 2013 at 12:33am by chris*

**Stats**

Add up the sum of the products of the sum and the probability of that sum. Possible sums are 3,4,5,6,7,8 and 9. There are 2 ways to get 3 or 9: (1,2)(2,1); (4,5), (5,4) There are 2 ways to get 4 or 8 There are 4 ways to get 5 or 7: (1,4)(4,1)(2,3)(3,2); (2,5)(5,2);(4,3)(3,4) ...
*Tuesday, May 26, 2009 at 11:15pm by drwls*

**Stats **

Assume that event A occurs with probability 0.4 and event B occurs with probability 0.5. Assume that A and B are disjoint events. The probability that either event occurs (A or B) is A. 0.0 B. 0.7 C. 0.9 D. 1.0.
*Saturday, March 29, 2014 at 10:07am by Tracy *

**Is this right?? Stats....**

Since the probability of the total of all events = 1, I would say .12 also.
*Tuesday, October 25, 2011 at 9:27am by PsyDAG*

**Stats**

I added the mean of 21 and SD of 10 and the probability is 0.9715. That is not one of my options, please help!
*Saturday, March 29, 2014 at 10:00am by Tracy *

**stats**

Between 11 P.M. and midnight on Thursday night, Mystery Pizza gets an average of 5.7 telephone orders per hour. a) Find the probability that at least 32 minutes will elapse before the next telephone order. b) Find the probability that less than 17 minutes will elapse. c) Find ...
*Sunday, October 31, 2010 at 2:13pm by anonymous*

**Stats**

I roll a pair of fair dice and compute the number of spots on the two sides facing up. Denote this total by X. The probability distribution of X is X Prob 2 1/36 3 2/36 4 3/36 5 4/36 6 5/36 7 6/36 8 5/36 9 4/36 10 3/36 11 2/36 12 1/36 The probability that X is an even number is
*Tuesday, July 2, 2013 at 3:28pm by MT*

**Business stats**

I have just started business school and am struggling with this HW problem. any help would be great!!...A certain type of new business succeeds 60% of the time. Suppose that 3 such businesses open (where they do not compete so its reasonable to believe that their relative ...
*Tuesday, April 14, 2009 at 5:03pm by bob*

**bus stats**

A manufacturing company has 5 identical machines that produce nails. The probability that a machine will break down on any given day is .1. Define a random variable X to be the number of machines that will break down in a day. a. what is the appropriate probability ...
*Friday, March 25, 2011 at 3:04pm by Mich Mich*

**Stats**

What is the probability that a simple random sample of 56 special orders will provide an estimate of the population proportion of special orders specifying the color black that is within plus or minus .05 of the actual population proportion,assuming p = .36? In other words, ...
*Tuesday, May 4, 2010 at 8:16pm by Anon*

**stats**

what is the probability that at least one of the marbles drawn is green? I thinks it's 1/11 but not sure. Then what is the probability that only one of the marbles drawn are green?
*Sunday, March 14, 2010 at 8:52pm by keisha*

**stats-probability**

given a chart with rain in inches- the greatest amount being 15 inches on the chart, we know the cumulative proability is 1. what is the probability of more than 15 inches of rain falling
*Friday, January 21, 2011 at 1:01am by joy*

**stats**

The P value is the probability that the results you have found would occur solely by chance. This should lead you to your answer. Thanks for asking.
*Tuesday, April 28, 2009 at 5:16pm by PsyDAG*

**Stats**

Poisson distribution (m = mean): P(x) = e^(-m) m^x / x! Values for (a): x = 0, 1 m = 0.63 Substitute and calculate for each x. Add those calculations together for a total probability. Then subtract that value from 1. This will give you the probability of more than one death. ...
*Tuesday, February 25, 2014 at 10:33pm by MathGuru*

**Stats **

For an individual bulb, the probability of a life between 105 and 115 hours is 0.1974. I used a normal probability calculator to get that. For 35 bulbs, the mean of the average remains 110 but the standard deviation is 20/sqrt35 = 3.38. The probabilty of the mean being between...
*Monday, January 31, 2011 at 3:45am by drwls*

**stats**

Look for the z value for which the integral of probability, from z<-4 up to z, is equal to 0.88. I get z = 1.177 at a spent amount of $19.68
*Sunday, October 10, 2010 at 2:04am by drwls*

**stats**

. Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.4 0.25 0.35 Please show all of your work.
*Sunday, October 7, 2012 at 9:47am by Anonymous*

**Stats**

Looking it up in the back of a statistics text in a table for "distribution of t probability," you need to realize that 1 - .9 = .1. Try .1 with n-1 or 21 df.
*Sunday, November 4, 2012 at 11:47am by PsyDAG *

**Stats**

A random sample of two hundred fifteen adults is selected from a certain population of registered voters. Assume the population is 20% democrats. Use a normal approximation to estimate (a) the probability the sample contains exactly 48 democrats, and (b) the probability the ...
*Thursday, October 21, 2010 at 2:58am by Chris*

**stats need help**

.45 is .05 away from the mean or .05/.023 = 2.17 standard deviations away from the mean. Your stats book should have a cumulative normal distribution table. Look up 2.17. I get .9850, meaning that the probability of observing a sample where more than 45% is 1-.985 = .015=1.5...
*Tuesday, March 17, 2009 at 9:59am by economyst*

**business stats**

A market research firm conducts telephone surveys with a 44% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate and respond to the questions? In other words, what is the probability that the ...
*Monday, May 24, 2010 at 9:48pm by chelsea*

**Stats**

Suppose X is a uniform random variable with C = 20 and d = 90. Find the probability that a randomly selected observation is between 23 and 85.
*Saturday, November 17, 2012 at 3:14pm by Marie*

**bus stats**

A deck of playing cards contains 52 cards, four of which are aces. What is the probability that the deal of a five-card hand provides: a. What is the appropriate probability distribution for X? Explain how X satisfies the properties of the distribution. b. A pair of Aces? c. ...
*Friday, March 25, 2011 at 3:12pm by Mich Mich*

**stats**

The probability that an individual has hearing loss is .40. The probability that an individual has poor eyesight is .55. If hearing loss and poor eyesight are INDEPENDENT events, what is the probability of a person with hearing loss and poor eyesight?
*Sunday, November 17, 2013 at 1:40pm by lono*

**stats**

Between 11 P.M. and midnight on Thursday night, Mystery Pizza gets an average of 4.2 telephone orders per hour. Find the probability that,
*Friday, October 8, 2010 at 1:12am by mnmn*

**business statistics**

Consult table in back of your stats text called something like "areas under the normal distribution" to find the probability.
*Tuesday, July 12, 2011 at 12:06am by PsyDAG*

**stats**

women age 20-29 is 36ml staandard deviation 7ml. What is probability greater than 45ml and between 30 and 62 ml
*Saturday, August 27, 2011 at 6:05pm by anna*

**STATS**

The probability of a manufacturing defect in an aluminum beverage can is .00003. If 100,100 cans are produced, (a) Find the approximate probability of at least two defective cans. (Round your answer to 4 decimal places.) (b) Find the approximate probability of at least three ...
*Saturday, October 30, 2010 at 7:13pm by Helen*

**Stats**

IF a single accident occurs, the probability is .25 that it occurs in the first mile.
*Monday, October 31, 2011 at 8:17pm by Damon*

**stats **

A salesperson goes door-to-door in a residential area to demonstrate the use of a new Household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) is 0.30. To perform ...
*Tuesday, June 14, 2011 at 11:05am by jenny*

**Stats**

The probability that the 1st driver says equal or better than average is .95. The probability that both say better than average is .95*.95 = .9025 Ergo, the prob that at least one says worse than average is 1-.9025 = .0975
*Wednesday, October 14, 2009 at 10:39am by economyst*

**bus stats**

John parks cars at a hotel. On the average, 6.0 cars will arrive in an hour. A driver's decision on whether to let John park the car does not depend upon any other person's decision. Define the random variable X to be the number of cars arriving in any hour period. a. Wat is ...
*Friday, March 25, 2011 at 3:09pm by Mich Mich*

**mba stats class, help!!**

A salesperson goes door-to-door in a residential area to demonstrate the use of a new Household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) is 0.30. To perform ...
*Wednesday, June 15, 2011 at 4:45pm by jenny*

**stats**

Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100. 4 marks a. What is the probability that a randomly selected applicant scores between 425 and 575? 4 marks b. What is the probability that a randomly ...
*Saturday, June 1, 2013 at 1:58pm by sue*

**stats**

A manufacturer of automobile batteries claims that the distribution of battery life is 54 months with a standard deviation of 6 months. We take a random sample of 50 batteries. a. Find the probability that their mean life is less than 52 months. b. Find the probability that ...
*Sunday, July 31, 2011 at 10:12pm by michelle*

**Stats (probability)**

Of 10 girls in a class, 3 have blue eyes. If two girls are chosen at random, what is the probability that (i) both have blue eyes, (ii) neither has blue eyes, (iii) at least one has blue eyes? I have the answers but do not know how to get them. I'm trying to use a tree diagram...
*Wednesday, March 16, 2011 at 12:17am by Morgan*

**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*

**Stats**

The unemployment rate in a city is 9%. Find the probability that at least 2 out of 8 people from this city sampled at random are unemployed.
*Thursday, October 28, 2010 at 3:00pm by LiCee*

**Prob Stats**

The probability of both/all events occurring is found by multiplying the probabilities of the individual events. .61^6 = ?
*Monday, January 9, 2012 at 7:51am by PsyDAG*

**Stats**

3. Suppose you work for the Ford Motor Company and must establish regulations concerning the maximum number of people who can ride in a minivan. Ford tells you that the total number of people in a minivan follows a normal distribution with a mean of 6 and a standard deviation ...
*Saturday, August 4, 2012 at 10:02am by AMbe*

**Stats**

In 1898 L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that the number of soldiers killed by horse kicks each year in each corps in the Prussian cavalry followed a Poisson distribution with a mean of 0.63. (a...
*Tuesday, February 25, 2014 at 10:33pm by Ashley*

**stats **

a horse race has 11 entries, assuming that their are no ties what is the probability that four horses owned by one person finish first second third and fourth
*Thursday, September 20, 2012 at 3:21pm by chuck*

**stats**

Among the contestants in a competition are 44 women and 26 men. if 5 winners are randomly selected, what is the probability that they are all men?
*Wednesday, July 14, 2010 at 10:53pm by jEFFREY*

**Algebra 2 - stats and probability**

I need someone to tell me how to set these up please? 1. A box contains 4 quarters. 2 of the quarters have the American eagle on the back. Suppose you draw 2 quarters at random with replacement. a. What's the probability that both have the American eagle on the back? b. What's...
*Wednesday, May 13, 2009 at 1:37pm by Kay*

**Stats**

Use z-scores. Formula: z = (x - mean)/sd Once you have the z-score, use the z-table to find the probability. Convert to a percentage.
*Sunday, December 16, 2012 at 5:30pm by MathGuru*

**stats**

if you randomly answer a t/f test and want to figure the possibililty of gettng at least an 80......how do you start and then once you have done this, what if you want to try it 4 more times? HELP Let N be the number of questions. You are asking for the probability of getting ...
*Thursday, July 5, 2007 at 5:17pm by holly*

**Stats**

Among 15,378 Delta airline passengers randomly selected, 3 were bumped from a flight against there wishes (based on data from the us dept of transportation) find the probability that a random selected passenger is involuntarily bumped. Is such bumping unusual? Does such ...
*Tuesday, February 1, 2011 at 4:15pm by Help please!*

**Stats**

Each of 2 players, independently, play a game 5 times, with each game having probability of success 0.40. What is the standard deviation of the sum of the games they win
*Sunday, October 9, 2011 at 1:05am by Jay*

**stats**

a candidate receives 60% of the N votes in an election, where N is very large. Compute the probability that he leads after a count of the first 100 votes.
*Saturday, October 29, 2011 at 3:04am by st*

**stats**

is there a good, relevant sites where i can get stats extra help?
*Thursday, October 11, 2007 at 7:45pm by Keirson*

**STATS**

Your question is worded in a confusing way. It sounds like the next 20 cars IN A ROW would have to be red. That would be a very low probability, (0.28)^20 = 8.8*10^-12, and the 30 cars seen after that would not matter. Don't you mean that you want the probability that exactly ...
*Wednesday, May 25, 2011 at 9:47am by drwls*

**problem stats**

For either-or probability, you add the probabilities of the individual events. Since all the probabilities are the same, you can just multiply the probaiblity by 5. I hope this helps. Thanks for asking.
*Monday, October 15, 2007 at 8:29pm by PsyDAG*

**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*

**stats**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
*Sunday, November 17, 2013 at 1:40pm by PsyDAG*

**Stats**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .8 * (1-.6) = ?
*Saturday, February 8, 2014 at 4:08pm by PsyDAG*

**stats**

Microbes in a certain colony exposed to radiation have a 1/6 chance of being mutated. a. If ten microbes from the colony are sampled, what is the probability that exactly 4 will be mutated? b. If ten microbes from the colony are sampled, what is the probability that at most 4 ...
*Saturday, October 16, 2010 at 5:22pm by jimmy*

**STATS**

In a certain store, there is a .05 probability that the scanned price in the bar code scanner will not match the advertised price. The cashier scans 820 items. a) What is the expected number of mismatches and standard deviation? (Round your expected number of mismatches to 1 ...
*Saturday, October 30, 2010 at 7:16pm by Helen*

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