Sunday

August 2, 2015

August 2, 2015

Number of results: 15,246

**statistics **

34. Two students (say A, and B) are challenged to solve a problem in statistics. Suppose that the probability that A will solve the problem is 40%, the probability that B will solve the problem is 55%, and the probability that A or B will solve the problem is 25%. The ...
*June 30, 2015 by meri*

**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 ...
*May 3, 2012 by sc*

**Statistics**

statistics homework help A drinking game involves a 14 sided die. Six of the 14 faces are squares A, B, C, D, E,and F for short. The other eight are triangles which are called 1,2,3,4,5,6,7, and 8. Each of the squares is equally likely. but he triangle probability differs from...
*December 18, 2012 by Anonymous*

**Statistics**

What is an example of a research problem at your organization that would benefit from the use of either descriptive statistics or probability distribution statistics?
*October 11, 2010 by Kathy*

**math**

The probability that Luis will pass his statistics test is 0.37. Find the probability that he will fail his statistics test.
*July 12, 2011 by candy*

**Probability & Statistics**

A basketball player shoots free throws and makes them with probability 1/3. What is the probability the player will miss three in a row?
*July 29, 2010 by anonymous*

**statistics**

1)Let X have a normal distribution with mean 6 and standard deviation 3. a) What is the probability that X > 8.7 2)What is the probability that X<0? 3)What is the probability that |X-6| > 1.9 ? I have got so far: P(Z > 0.9) but I do not know where to go from here! ...
*October 7, 2012 by rachel*

**Statistics**

Assume that a procedure yields a binomial distribution with n=3 trials and a probability of success of p= 0.90. Use a binomial probability table to find the probability that the number of successes x is exactly 1.
*December 2, 2014 by Angel*

**statistics **

12. The probability that the Dow Jones stock index will close above 18000 at the end of the year is an example of (a) classical probability. (b) subjective probability. (c) independent probability. (d) priory probability. 13. The probability calculated based on observing a ...
*June 30, 2015 by meri*

**statistics**

Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path from the left end to ...
*February 17, 2014 by sam*

**Statistics**

Event A occurs with probability 0.1 and event B with probability 0.5 A) What is the maximum probability that the intersection of A and B can have? B) What is the minimum probability that the intersection of A and B can have? C) If it is know that P(A complement and B ...
*September 6, 2014 by Rebekah*

**math/statistics**

Could anyone explaint to me what role the Binomial Theory plays in statistics and probability? Using statistics, we can make statements about a population based on sample data. Probability helps us make those statements. The binomial theory can be used to determine ...
*March 6, 2007 by Jennie*

**Statistics**

If red has a probability of occurrence of .70 and black has a probability of occurrence of .30 and they are the only choices what is the probability that you pick the right color 10 out of 10 times and what is the standard deviation. I keep getting (.70*.50) + (.30*.50) = .50...
*February 11, 2012 by Joe D.*

**statistics**

Let a random variable be distributed as shown below X=x : 0,1,2,3,4,5,6 P(x): .1 .09 .2 .15 .16 .2 (a) Find the probability p(6) (b) Find the probability P(3< X < 5) (c) Find the probability P(X < 4) (d) Find the probability P(X > 2)
*September 17, 2011 by kim wallace*

**statistics math**

The unemployment rate is 5.8% (Bureau of Labor Statistics, April 3, 2003). Suppose that 100 employable people are selected randomly. 1)What is the probability that exactly six people are unemployed (to 4 decimals)? 2)What is the probability that exactly six people are ...
*October 18, 2009 by aaron*

**Math - Statistics**

I roll 12 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? So i take it, on any give roll, the probability of rolling a 2 is .25 (25%); the probability of rolling something else must be .75 The probability ...
*March 29, 2007 by Lauren*

**statistics**

For any married couple who are members of a squash club, the probability that the husband has a degree is 2/4 and the probability that the wife has a degree is 1/4. The probability that the husband has a degree given that his wife has a degree is 3/9. A married couple is ...
*December 3, 2011 by Nabiha*

**Statistics**

Using formula P(x) = x/15 For each of the values x = 1, 2, 3, 4, and 5. a. probability distribution of x. b. Show that the probability distribution of x satisfies the properties of a discrete probability distribution. c. mean of x. sketch the two specified normal curves on the...
*October 26, 2009 by Chinadoll*

**probability and statistics I NEED HELP**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*May 11, 2011 by Emily*

**Statistics**

Red has probability .30 and black has probability .70. What is the probability that patron will win all ten wagers if alternating between red and black on each wager? What would be the standard deviation?
*February 21, 2012 by Joe Dee.*

**statistics; emergency please help me**

Assume a binomial probability distribution has p = .60 and n = 200. c. What is the probability of 100 to 110 successes (to 4 decimals)? d.What is the probability of 130 or more successes (to 4 decimals)?
*April 8, 2014 by Vanessa*

**statistics; emergency please help me**

Assume a binomial probability distribution has p = .60 and n = 200. a. What is the probability of 100 to 110 successes (to 4 decimals)? b. What is the probability of 130 or more successes (to 4 decimals)?
*April 10, 2014 by Vanessa*

**statistics**

if Z is a standard normal variable, find the probability. the probability that z lies between -2.41 and 0
*May 25, 2010 by shasha*

**Math (Statistics)**

What causes experimental probability to match theoretical probability?
*January 23, 2015 by Rachel*

**Statistics**

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial. n=21, x=18, p=0.75
*June 30, 2014 by Kasey*

**Statistics**

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability of success on a single trial, n=9, x=2, p=0.35.
*August 25, 2014 by Robin*

**statistics**

Assume a binomial probability distribution has p = .60 and n = 200. c. What is the probability of 100 to 110 successes (to 4 decimals)? d. What is the probability of 130 or more successes (to 4 decimals)?
*April 6, 2014 by Vanessa*

**statistics**

Assume a binomial probability distribution has p = .60 and n = 200. c. What is the probability of 100 to 110 successes (to 4 decimals)? d. What is the probability of 130 or more successes (to 4 decimals)?
*April 7, 2014 by vanessa*

**statistics**

50 question multiple choices with A, B, C, D Probability of an unsual score? Probability of between 20 and 30 correct inclusive?
*November 10, 2007 by Anonymous*

**Probability/Statistics**

Two independent events, A and B, satisfy Pr(A) = 0.6 and Pr(B) = 0.3. In the case of Pr(A or B), why isn't the answer 0.3? We are looking at the probability of A or B. I choose B. Thank you!
*February 24, 2009 by David*

**statistics**

Let E and F be two events for which the probability of atleast one of them occurs is 3/4. what is the probability that neither E nor F will occur.
*September 11, 2014 by jasmine*

**Statistics**

Suppose we want to determine the (binomial) probability (p) of getting 4 heads in 15 flips of a 2-sided coin. Using the Binomial Probabilities Table in Appendix B of the text, what values of n, x and p would we use to look up this probability, and what would be the probability?
*October 13, 2011 by destiny*

**Statistics**

A company claims that no more than 5% of a particular product has a defect. In a shipment of 15 units what is the probability of receiving 3 or 4 defective units? You can probably use a binomial probability function for this problem. P(x) = (nCx)(p^x)[q^(n-x)] n = 15 x = 3, 4 ...
*February 26, 2007 by Jason L*

**Probability and statistics**

The probability that at most 3 tosses of a balanced dice are required to get a prime number on top is equal to a. 7/8, b.1/4, c. 1/2, d.3/4.
*March 1, 2012 by Arun*

**Statistics - Probability**

The probability of receiving a "false positive" from a mammogram is 7%. What is the probability that out of 10 mammograms, a patient receives at least 1 false positive?
*July 14, 2011 by Ana*

**statistics**

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 .70 and has failed with a probability of .30. What is the probability that between 25 and 30 batteries (inclusive) will ...
*December 26, 2012 by Camela*

**probability and statistics**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*May 11, 2011 by Emily*

**Statistics**

Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.
*October 20, 2011 by jane*

**statistics**

use the normal distribution to approximate the desired probability. find the probability that in 200 tosses we will obtain at least 40 fives.
*October 16, 2010 by monique*

**Statistics-Probability**

Consider a binomial random variable X with parameters(4,1/2). Find the conditional probability mass function of X given that X is odd
*January 25, 2012 by sand*

**Probability and statistics**

8. A random variable X takes exactly the 5 values 1, 2,3,4,5, all with same probability. The mean of X is Choose one answer a. 2.5 b. 15 c. 7.5 d. 3
*March 2, 2012 by Arun*

**statistics**

For a normal distribution, explain why we calculate the probability of a range of numbers instead of the probability of a single number on the lines below?
*June 9, 2014 by rehena *

**statistics - probability**

A total of 16 mice are sent down a maze, one by one. From previous experience, it is believed that the probability a mouse turns right is .38 a) What is the probability that 8 or fewer turn right? b) What is the probability that 8 or more turn right? c) What is the probability...
*October 12, 2012 by andy*

**Economics/Statistics**

1. Assume that q and z are two random variables that are perfectly positively correlated. q takes the value of 20 with probability 0.5 and the value of zero with probability 0.5, while z takes the value of 10 with probability 0.5 and the value of zero with probability 0.5. ...
*December 6, 2009 by Susan*

**Statistics and Probability**

In a game of skill, a player has probability 1/3,5/12,1/4 of scoring 0,1,2 respectively and the game ends when he scores a zero. Assuming independence of trials, find the probability of the total score being 'n' when the game ends?
*October 7, 2011 by Saurabh*

**statistics, probability**

It has been found out that the probability that a child is a male in family is 0.4. In a family of 6 children, what is the probability that; i. exactly 5 are boys ? ii. at least 4 are boys ? iii. all boys
*July 9, 2014 by pauline*

**ap statistics**

In hypothesis testing, β is the probability of committing an error of Type II. The power of the test, 1 - β, is then: A. the probability of failing to reject H0. B. the probability of rejecting H0 when HA is true C. the probability of failing to reject H0 when H0 is ...
*April 24, 2014 by emma*

**statistics**

The power of a significance test for a particular value of the parameter is computed to be 0.93. Which statement below is true? a) The probability of committing a Type I error is 0.07. b) The probability of committing a Type I error is 0.93. c) The probability of committing a ...
*April 17, 2012 by Anna*

**Probability and statistics**

6. The probability that at most 3 tosses of a balanced dice are required to get a prime number on top is equal to Choose one answer a. 7/8 b. ¼ c. ½ d. ¾
*March 2, 2012 by Arun*

**statistics**

Consider a binomial experiment with 20 trials and a probability of 0.45 on a single trial.Use the normal distribution to find the probability of exactly 10 successes.
*March 21, 2014 by john*

**Statistics**

In a particular suburb 30% of housholds have installed electronic security systems. If 2 households are chosen at random from this area, what is the probability that neither has installed a security system? Using the binomial probability function for this problem: P(x) = (nCx...
*February 26, 2007 by Jason L*

**statistics**

I need to post some thought on using either the multiplication rule or probability to answer a question on my online statistics.
*July 10, 2011 by keri*

**statistics**

A mini-computer system contains two components, A and B. The system will function so long as either A or B functions. The probability that A functions is 0.95, the probability that B functions is 0.90, and the probability that both function is 0.88. What is the probability ...
*March 5, 2011 by Paula*

**statistics - conditional probability**

Event A has probability 0.9 of occurring. Event B has 0.2 chance of occurring if, and only if, event A has occurred. What is the overall probability that event B will occur? I'm so confused. This seems so simple, I'm not sure why I can't reason through it. They're not ...
*September 25, 2013 by Pam*

**statistics - conditional probability**

Event A has probability 0.9 of occurring. Event B has 0.2 chance of occurring if, and only if, event A has occurred. What is the overall probability that event B will occur? I'm so confused. This seems so simple, I'm not sure why I can't reason through it. They're not ...
*September 25, 2013 by Pam*

**statistics**

From a bag containing 6 black and 4 white balls, 2 balls are selected,one after the other,without replacement. Find (a) the probability that they are both black (b)the probability that they are both the same colour, (c) probability that they are different colours.
*May 21, 2011 by Moses joseph*

**statistics**

Use of normal distribution to approximate the desired probability. Find the probability of getting at least 30 fives in 200 tosses of a fair 6 sided die.
*October 8, 2010 by Lori*

**Probability and statistics**

4. The probability that a prime number occurs on at least 2 tosses when a balanced dice is tossed 5 times independently is equal to. Choose one answer a. 26/32 b. 30/32 c. 6/32 d. 16/32
*March 2, 2012 by Arun*

**Statistics **

The probability distribution of number of calls coming to a call center every 15 minute period is shown below. x 5 6 7 8 9 10 11 12 13 p ( x ) 0.02 0.04 0.07 0.08 0.09 0.11 0.12 0.13 0.10 Continued… x 14 15 16 17 18 19 20 p ( x ) 0.07 0.06 0.04 0.03 0.02 0.01 0.01 1. This ...
*July 6, 2015 by meri*

**statistics**

The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally distributed variable. Find the probability that one student selected at random is older than 23. Find the probability that the mean age of a group of 16 ...
*June 11, 2010 by DezShonna K*

**statistics**

Assume a binomial probability distribution has p = .60 and n = 200. a)What are the mean and standard deviation (to 2 decimals)? b)Why can the normal probability distribution be used to approximate this binomial distribution? c)What is the probability of 100 to 110 successes (...
*April 5, 2014 by Vanessa*

**Statistics**

A total of 16 mice are sent down a maze, one by one. From previous experience, it is believed that the probability a mouse turns right is .38 a) What is the probability that exactly 8 of these 16 mice turn right? b) What is the probability that 8 or fewer turn right? c) What ...
*October 12, 2012 by please help*

**statistics **

30. The probability that a person can get infected with a rare type of blood disorder is very small. Suppose that a blood test performed on 10,000 people showed that two persons tested positive that is, a 0.02% chance of getting this type of blood disorder. This probability ...
*June 30, 2015 by meri*

**statistics **

15. The probability that a recently offered stock by a technology company will double in value within the next three months is 90%. The conclusion regarding this probability estimate was reached based on the opinion of the experts in the technology field to which this stock ...
*June 30, 2015 by meri*

**Statistics**

The probability of Joe is at work is 49%. The probability Joe is at home is 25%. What is the probability Jow is neither at Work nor at home? A) 39% B)74% C)52% D)26% I get the answer at about 38%,but doesn't round to 39%, can anyone help, I'm stuck.
*December 8, 2013 by Luke*

**statistics**

We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 40 students from the population. If the true percentage is really 77%, find the probability of observing 39...
*August 8, 2010 by yamini*

**statistics**

Consider a binomial experiment with 20 trials and probability 0.45 on a single trial. Use the normal distribution to find the probability of exactly 10 successes. Round your answer to the thousandths place.
*May 17, 2011 by coya*

**statistics**

Consider a binomial experiment with 20 trials and probability 0.45 on a single trial. Use the normal distribution to find the probability of exactly 10 successes. Round your answer to the thousandths place.
*August 2, 2011 by lee*

**Statistics**

Suppose that the probability distribution of a random variable x can be described by the formula P(x) = x/15 For each of the values x = 1, 2, 3, 4, and 5. For examples, then, p(x=2) = p(2) = 2/15 a Write out the probability distribution of x. b Show that the probability ...
*October 26, 2009 by Chinadoll*

**statistics**

Event Probability Too much enamel 0.25 Too little enamel 0.2 Uneven application 0.35 No defects noted 0.42 (1) What is the probability of a paint defect? What is the probability of a paint defect which includes an improper amount of paint?
*September 29, 2010 by Jordan*

**Statistics**

Let X1;X2;X3;...;X6 be a random sample from a distribution with the following probability desity function: Fx(x) = (1+4x)/3 for 0<x<1 = 0 for x=<0; x>=1. (a) Determine the joint p.d.f of Y1 and Y6 where Y1<Y2<...Y6 are the order statistics. (b) Let R= Y6-Y1 ...
*August 10, 2006 by ruth*

**math**

Ok. I pretty much have this one solved but the final answer has me stumped. The probability that Luis will pass his statistics test is 0.51. Find the probability that he will fail his statistics test. This is what I have so far. P(fail)=.51; =1-.51. But I am not sure of the ...
*July 30, 2010 by annie*

**statistics**

Ignoring twins and other mutiple births, assume babies born at a hospital are independent events with the probability that a baby is a boy and the probability that a baby is a girl both equal to 0.5. Referring to the information above, the probability that at least one of the ...
*September 19, 2007 by Anonymous*

**statistics**

Three horses, A, B and C are in a race. A and B have the same probability of winning, and each is twice as likely to win as C. Find the probability of B or C winning.
*March 19, 2009 by Carline*

**Statistics - Monte's Dilemma**

Why does it make a difference when you switch doors? What is the probability of winning given that you stayed and what is the probability given that you switched?
*October 15, 2009 by Bob*

**statistics**

Consider the probability that less than 13 out of 151 CDs will be defective. Assume the probability that a given CD will be defective is 12%
*March 25, 2013 by Tammy*

**math - probability and statistics**

P(E)=.4, P(F)=.5 and P(E[intersect]F)=.1 , Calculate P(F[suchthat]E)=? Using conditional probability, I got .2 as the answer, right? Is the answer the same for P(EsuchthatF)?
*August 31, 2009 by Dee*

**statistics**

Let E and F be two events for which the probability of atleast one of them occurs is 3/4. what is the probability that neither E nor F occurs? The hint is to use Demorgan's laws
*September 10, 2014 by rebecca*

**Easy Statistics**

The probability Joe is at work is 49%,. The probability Joe is at home is 25%. What is the probability Joe is neither at work nor at home? a) 39% b)74% c)52% d) 26% *I personally think it is a or c. I am just needing some help thanks!
*December 6, 2013 by Dawn*

**Statistics/Probability**

5) The product is sold in packets whose masses are normally distributes with mean of 1.42 kg and a standard deviation of 0.025 kg. (1) Find the probability that the mass of a packet, selected at random, lies between 1.37 kg and 1.45 kg
*July 17, 2014 by Koylar*

**statistics**

If the probability of running out of gas is .03 and the probability the electronic starting system will not work is .01 a.) what is the probability there will be enough gas and that the starting system will work? assume the two events are independent b.) when may independence ...
*September 2, 2011 by kkg*

**statistics**

The probability that a house is burglarized in the city is 5%. If 50 houses are randomly selected, what is the probability that none will be burglarized?
*July 14, 2012 by Sherry*

**statistics**

Find the mean of the given probability distribution. The number of golf balls ordered by customers of a pro shop has the following probability distribution.
*February 12, 2012 by mary*

**AP Statistics**

if the probability of a swan drowning is .27, find the probability of exactly 4 out of the 7 swans drowning.
*January 6, 2010 by Belle*

**Statistics**

Put in Binomial Probability Formula? probability ( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20
*March 9, 2014 by Brenda*

**Statistics**

Cellular Phone Sales The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown below. Find the mean, variance, and standard deviation for this probability distribution. X 4 5 6 8 10 P (X) 0.4 0.3 0.1 0.15 0.05 What is the ...
*April 10, 2012 by Victor*

**statistics**

a statistics instructor collected data on the time it takes the students to complete a test. the test taking time is uniformly distributed within a range of 35 minutes to 55 minutes. determine the standard deviation, what is the probability a particular student will take less ...
*January 13, 2015 by sam *

**Statistics**

Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability . Compute the probability that occurs or does not occur (or both). Compute the probability that either occurs without occurring or and both occur.
*April 8, 2013 by Jack*

**Statistics **

The Amount of filling a half-liter (500ml)soft drink bottle is normally distributed. The process has a standard deviation of 5ml. The mean is adjustable. A. Where should the mean be set to ensure a 95% probability that a half-liter bottle will not be under filled? B. A 99% ...
*April 11, 2014 by KT*

**statistics**

Using our data set from Unit 1, compose a 3-page e-mail to the head of the American Intellectual Union, which includes the following: 1.Begin your e-mail to AIU by first providing an overview of the database, that is, a story about the characteristics that may include types of...
*November 22, 2011 by hilda*

**Statistics**

The probability that a radish seed will germinate is 0.6. Estimate the probability that of 130 randomly selected seeds, exactly 90 will germinate. Note: I keep getting the answer wrong.
*July 20, 2012 by Ann*

**Statistics**

there is a 1/5 (.20) probability that one type of appliance will break with in two years. find the probability that 4 out 15 such appliances willl break within that time period
*June 17, 2014 by Anonymous*

**Statistics**

You have an SRS of size n = 16 from a Normal distribution with standard deviation = 1. You wish to test H_0 :Î¼ = 0 H_a :Î¼ > 0 You decide to reject H_0 if x bar > 0 and to accept H_0 otherwise. a. Find the probability of a Type I error. That is, find the probability ...
*May 6, 2012 by Ryan*

**Statistics**

Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. Find the probability of exactly eight in ten births.
*March 13, 2011 by chalulu*

**statistics**

Consider a binomial experiment with 20 trials and probability 0.45 on a single trial. Use the binomial distribution to find the probability of exactly 10 successes. Round your answer to the thousandths place
*July 28, 2011 by Rosalyn*

**statistics**

A Gallup poll of 1236 adults showed that 12% of the respondents believe that it is bad luck to walk under a ladder. Consider the probability that among 30 randomly selected people from 1236 who were polled, there are at least 2 who have that belief. Given that the subjects ...
*June 30, 2014 by Kasey*

**statistics**

1. Express the indicated degree of likelihood as a probability value. "There is a 40% chance of rain." 2. Find the indicated probability A bag contain 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability ...
*August 28, 2007 by george*

**statistics**

1. Express the indicated degree of likelihood as a probability value. "There is a 40% chance of rain." 2. Find the indicated probability A bag contain 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability ...
*August 29, 2007 by george*

**statistics**

An instant lottery scratch-off game offers a 0.04 probability of winning on any one play. Plays are independent of each other. If you play 7 times, what is the probability you win at least once?
*February 13, 2009 by diana*

**Statistics**

I'm looking at my notes and I can't seem to figure how my teacher did this problem. She used her name which has 9 letters, 3 vowels, and 6 consonants. If we were to reach in the bag and grab 3 letters out. By using the probability distribution what's the probability of getting...
*March 3, 2010 by John*