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July 28, 2014

Search: Algebra 2: Prob and Stats

Number of results: 31,389

stats
a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will guess at most 12 right c) prob that he will ...
February 18, 2011 by gio

Algebra 2: Prob and Stats
Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625
May 24, 2010 by Skye

stats & prob.
Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.
November 27, 2012 by Georgia

Algebra 2: Prob and Stats
The numbers of cookies in a shipment of bags are normally distributed, with a mean of 64 and a standard deviation of 4. What percent of bags of cookies will contain between 60 and 68 cookies? * 50% * 13.5% * 68% * 34%
May 24, 2010 by Skye

Prob and Stats
In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56
December 9, 2009 by please help!

Stats
nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...
April 15, 2010 by UPD

math- algebra- help please!
3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5
April 6, 2011 by Zach

Prob and Stats
If X is a random variable with distribution X~N(350,110) find (a)P(X<400) and b)P(250<X<400)
October 4, 2011 by Kathryn

math
the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...
June 26, 2007 by celina

algebra
Prob.1: -14=2x+2x-2 Prob.2: 5x=50
May 29, 2013 by cheyenne

Prob&stats
Search results for: Using numbers 1-20 what is probability a randomly chosen number is either an even number or a number greater than 14?
February 29, 2012 by Rosa

Prob&stats
Search results for: Using numbers 1-20 what is probability a randomly chosen number is either an even number or a number greater than 14?
February 29, 2012 by Rosa

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 ...
July 5, 2007 by holly

prob and stats
The scores on an Economics examination are normally distributed with a mean of 77 and a standard deviation of 18. If the instructor assigns a grade of A to 16% of the class, what is the lowest score a student may have and still obtain an A? (Give your answer to two decimal ...
October 15, 2010 by br0Ok3

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
July 2, 2013 by MT

statistics
Use the normal dist to approx the desired prob. Find the prob of getting at most 30 fives in 200 tosses of a fair 6 sided die
October 4, 2013 by Sandra

Statistics
How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..
March 9, 2014 by Brenda

Algebra 2: Prob and Stats
A survey of 480 high school students found that 37% had a pet. Find the margin of error. Round to the nearest percent. Use the margin of error to find an interval that is likely to contain the true population proportion. * margin of error = +-5% interval, 37% to 42% * margin ...
May 24, 2010 by Skye

Math
How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "$2 for 5 cans of tomato soup"
January 10, 2011 by Sarah

algebra
another prob(last one) 6x-7x=18
June 8, 2010 by Anonymous

Prob and Stats
Einstein claims that his true average quiz score is 90. You have sample data on 25 of his quizzes. The average for that samaple is 83, and the standard deviation for the sample (s) is 4. The alpha for this two-tailed test is 0.05. Provide the calculated t-vaule, the critial t-...
November 14, 2009 by Statistics help!

stats. plz help i have exams in two days!
find the indicated prob.: the amount of snowfall falling in a certain mountain range is normally distributed with a mean of 86 inches, and a standard deviation of 12 inches. what is the probability that the mean annual snowfall during 36 randomly picked years will exceeds 88.8...
May 25, 2010 by shasha

Stats / Prob
Suppose a box of marbles contains equal numbers of red marbles and yellow marbles but twice as many green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilities to the elements in the sample space. (Give your answers as fractions.)
February 13, 2013 by Anonymous

probability!
so i am asked to find the prob of a male professor - given that he is promoted. and the stats are female promoted = 3% female not promoted - 12% male promoted 17% male not promoted - 68% and i just wrote down that it is 17% is this true? ALso, i looked up in my book that P(A I...
October 19, 2010 by Lauren

Prob and stats
A card is to be chosen at random from a shuffled deck. Find the probability the card drawn is A. The queen of clubs , given that it is an honor card B. a red four, given that the face number is even C. A seven, given that the face number is prime Please help me, thanks :)
February 19, 2013 by Mac

stats.& Prob
Astudy shoed 53% of college applications were submitted online. Assume this result is based on sa simple random sample of 1000 applications with 530 submitted online. Use 0.01 sig.level to test claim that among all student applications the percentage submitted online is equal ...
August 15, 2011 by sheila

Prob Stats
In one town, 61% of adults have health insurance. What is the probability that 6 adults selected at random from the town all have health insurance?
January 9, 2012 by Kathy

Prob Stats
In one town, 61% of adults have health insurance. What is the probability that 6 adults selected at random from the town all have health insurance?
January 9, 2012 by Kathy

Prob and Stats
A lot of pigs should be shipped to marken when their average weight is 220lb. If the pigs are too light, then fewer total pounds are sold. If the pigs are too heavy, then a lower price is recieved. To determine what a lot of pigs should be shipped, the farmer weighs a sample ...
November 14, 2009 by Statistics help!

prob/stats
Nationwide, the amount charged by doctors for performing a particular minor surgical procedure averages $1220 and varies with a standard deviation of $270. We randomly select 140 bills from the population of all bills charged for this surgery. Let represent the average amount ...
March 29, 2011 by amanda

prob/stats
Nationwide, the amount charged by doctors for performing a particular minor surgical procedure averages $1220 and varies with a standard deviation of $270. We randomly select 140 bills from the population of all bills charged for this surgery. Let represent the average amount ...
March 29, 2011 by amanda

prob and stats
11. Assume that the population of heights of male college students is approximately normally distributed with mean m of 72.15 inches and standard deviation s of 6.39 inches. A random sample of 96 heights is obtained. Show all work. (A) Find (B) Find the mean and standard error...
October 24, 2012 by Anonymous

prob and stats
A coin is weighted so that the probability of obtaining a head in a single toss is 0.37. If the coin is tossed 27 times, find the following probabilities. Round your standard normal variable to two decimal places before using the table of values. (Give your answers to four ...
October 15, 2010 by br0Ok3

Prob/Stats
Historically, 5 percent of a mail-order firm's repeat charge-account customers have an incorrect current address in the firm's computer database. a)what is the probability that none of the next 12 repeat customers who call will have an incorrect address? b) One custome... ...
October 20, 2009 by Anonymous

Stats
I have a test on this tomorrow and I swear he didn't teach this and the book's not helping either, so maybe u can: A hwy engineer knows that his crew can lay 5 miles of hwy on a clear day, 2 miles on a rainy day, and only 1 mile on a snowy day. Suppose that the probabilities ...
November 14, 2012 by Jessica

Statistics
DIAGRAMS MUST BE DRAWN Given the standard normal distribution, determine:Prob Z greater than 1.50 Prob Z between1.06 and 1.96 Given the standard normal distribution determine the Z values that contain 80% in the middle of the curve.
March 2, 2013 by Sue

algebra
-720=x-9x plese explain to me how to do this prob step by step
June 8, 2010 by Anonymous

stats
is there a good, relevant sites where i can get stats extra help?
October 11, 2007 by Keirson

Probability and Statistics (Continuation)
Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and tested. What is the probability that the third nondefective engine will be found a)on the fifth trial? b) on or before the fifth trial? MY answers: a) P...
September 29, 2013 by Katy

STATISTICS
PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...
February 10, 2008 by todd

statistics
PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...
February 10, 2008 by todd

statistics
Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is the prob. that more ...
February 10, 2008 by todd

Physics but algebra problem
Having issue with algebra. 89N=ma 99N=m2a would you do something like plugging one into the other such as. a=89/m 99N=99/(2(89/m) prob is when i get a fraction in the denominator i get confused can someone help me. I'm trying to find the mass. Which i will then convert into ...
September 23, 2009 by Leah

Finance
Assuming that the returns from holding small-company stocks are normally distributed, what is the approximate probability that your money will double in value in a single year? What about triple in value. Many of my classmates have an expected return of 17.6% and a standard ...
July 15, 2012 by Anonymous

ECON! Please help!
Joe: y= 100 (High) prob = 2/5 =25 (medium) prob= 2/5 =0 (low) prob = 1/5 Calculate: 1. José’s risk premium, p, associated with farming and 2. José’s certainty equivalent associated with farming. The village decides to implement an informal insurance (risk sharing) arrangement...
June 1, 2010 by anonymous

statistics
Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...
April 15, 2010 by UPD

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 ...
June 8, 2010 by kyuu09

math
dale placed six cARDS IN A BAG.QONE CARD IS LABELD 1,TWO CARDS ARE LABELD2,AND RTHREE CARDS ARE LABELD 3.FIND THE PROBABILITY OOF PICKING TWO CARDS IN THE ORDER OF THE NUBERS LISTED TH EFIRST CARD IS RETURNED BEFORE THE SECOND IS PICKED ..... P,(1,2) P(3,NOT1) p(NOT2,2) P(1,3...
May 22, 2007 by sam

algebra word prob. - one more
The sum of the digits of a certain two-digit number is 7. Reversing its digits increases the number by 9. What is the number? TIA
March 23, 2008 by jen

prob and stats
–/3 points Notes Question: TanColM7 8.6.003. TKK Products manufactures electric light bulbs in the 50-, 60-, 75-, and 100-watt range. Laboratory tests show that the lives of these light bulbs are normally distributed with a mean of 774 hr and standard deviation of 68 hr. Find ...
October 15, 2010 by br0Ok3

prob and stats
A test is conducted in 22 cities to see if giving away free transit system maps will increase the number of bus riders. In a regression analysis, the dependent variable Y is the increase in bus riders (in thousands of persons) from the start of the test until its conclusion. ...
December 9, 2009 by please help!

Prob and Stats
To estimate the mean height population of male students on your campus, you will measure and SRS of students. Heights of people the same sex and similiar ages are close to normal. You know from government data that the standard deviation of the heights of young men is about 2....
October 12, 2010 by Susan

algebra word prob 1
i need to write an expression that would help find the total cost of fifty $6.00 movie tickets and eight $12 play tickets. THen find the total cost. i wrote: ($50.00 x 6) + ($8x12) = 300 + 96 =$396 is that right?
October 6, 2011 by Marko

Prob/Stat
If P(A) = .3 and P(B) = .4 and P(AandB) = .2 what is P(A/B)? P(B/A)? Are A and B indepentent?
April 1, 2012 by Sheila

quantum
prob 2 ans please?
September 13, 2013 by Anonymous

Algebra help please
Simplify I am using parenthesis to separate , if i write the whole prob as is, it runs together a + 9 (3a - 18) _____ ________ 36 - a^2 (3a + 27) possible answers i can choose from 1 ____ a + 6 1 ____ a - 6 - 1 ____ a - 6 - 1 ___ a + 6 I am thinking it is - 1 ___ a + 6 but I ...
May 6, 2007 by Kitty

Algebra 2: Probability and Stats
The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 10. What percent of the scores are greater than 87? * 68% * 16% * 84% * 2.5%
May 24, 2010 by Skye

Algebra 1 word prob
For the period 1985-2001, the average salary "y"(in thousands of dollars) per season of a Major League Baseball player can be modeled by y=7x^2-4x+392 where x is the number of years since 1985. Write and solve an equation to find the year when the average salary was $1,904,000.
August 30, 2013 by Ⓔ.Ⓣ.Ⓦⓐⓩ Ⓗⓔⓡⓔ

math prob
how many midsegments does a triangle have?
May 8, 2009 by gabe

math
so the prob of drawn an ace or spade is 4/52
October 27, 2009 by rency

Math Prob
ok for changing the base of a log from 10 to e is there a formula?
December 11, 2008 by confused

Prob and Stats
The Roper Organization conducted identical surveys 5 years apart. One question asked of women was Are most men basically kind, gentle, and thoughtful? The earlier survey revealed that, of the 3,000 women surveyed, 2,010 said that they were. The later revealed 1,530 of the 3,...
September 5, 2011 by Dave

SPELLING PLEASE help
the prob is: middle : center :: thinner : s _ _ _ _er
November 27, 2007 by Amber

MATH Prob.
How many different ways can a teacher line up 5 students for lunch?
August 20, 2009 by Twg

probability!
we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that someone who ...
October 21, 2010 by Lauren

Algebra
The Indians and Yankees are to face each other in a best two out of three playoff series. The probability of the Indians winning any given game is 0.3% A. what is the prob. that the Indians win the second game? B. What is the probability that the Indians win the second game ...
January 2, 2011 by Brianna

prob.
If it is given that P(A)=1/3 and P(B/A)=2/3 (the dividing sign is ment to be a vertical bar), what is P(A and B). I got .07. Is this correct? If it isn't, why not?
December 18, 2008 by Juliette

MATH Prob.
How many three-symbol codes can be formed from the letters I, S, P, and Y without repetition?
August 6, 2009 by Twg

math - probability
Albino rats used to study the hormonal regulation of metabolic pathway are injected with a drug that inhibits body synthesis of protein. Usually, 4 out of 20 rats die from the drug before the experiment is over. a) If 10 animals are treated with the drug, what is the expected ...
October 14, 2006 by Lindz

Algebra help needed!
x ^2 + 6x + 9 (x ^2 - 3x) _____________ __________ x (x ^2 - 9) possible answers are 1 ___ x -3 x-3 x + 3 1 ____ x + 3 so far i got 3x(3X-4)/X^3-9....then facotor the denominator...after that cancel out the like terms.. Simplify I am using parenthesis to separate , if i write ...
May 6, 2007 by Heidi

MATH Prob.
Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??
August 19, 2009 by Twg

MATH Prob.
What is the expected value of one 700 tickets in a raffle for a prize of $1400?
August 20, 2009 by Twg

MATH Prob.
how many three letter symbols can be formed from the letters A,C,K,L, & M without repetition? so far I have 12
August 8, 2009 by Twg

MATH Prob.
if you have two fair dice that are rolled, what is the probability of a sum 6 given that the roll is a 'double'?
August 8, 2009 by Twg

MATH Prob.
What are the odds in favor of getting at least one head in three successive flips of a coin?
August 11, 2009 by Twg

MATH Prob.
There are 6 contestants in a singing competition. How many different ways can first, second, and third place be awarded?
August 20, 2009 by Twg

Calculus
I'm having difficulty figuring #2 of this prob;em. I'm utterly clueless. Can someone explain it? Please and thank you. y=x 2. List the roots of the function.
August 18, 2011 by Elee

PLEASE HELP - DIVISORS PROB
What is the probability that a randomly selected divisor of 720 is a multiple of 4? Express your answer as a common fraction.
November 15, 2012 by failureinmath

Stats
On her first test in algebra, Mary earned a score of 75, and she made an 85 on her first psychology test. If the average score on the algebra test was a 68, with s=7, and the average on the psychology test was 91, with s=6, is Mary doing better in psychology or algebra. Why?
October 4, 2012 by Amber

math
am having prob..wv zs numb..given that f(x)=x+6/2x,find f(4) and f inverse(x) am not sure abt the answer the frst 1,i get 1.25 and the second oneeee i dnt knw hw to do it
September 16, 2008 by pallaa

MATH Prob.
How many batting lineups of the nine players can be made for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?
August 12, 2009 by Twg

chem
I am having a hard time with the following : 50 g HCl + 50g Ca(OH)2=H2O+? amt of CaCl2? I dont know how to set this prob. up.Please HELP!Thank you in advance....
November 12, 2010 by joann

Algebra
Maybe that was to confusing...we have a data sheet to fill out - 2 questions with simple interest and 2 with compound interest. I just need the simple interest help: Prob. #1 Find the total amount if you deposit $500. at a rate of 5% for two years using simple interest. Year 1...
February 25, 2013 by Cassie

math prob
Twelve people attend the first meeting of the Star Wars Club. They exchange e-mail addresses. How many exchanges take place?
October 6, 2013 by Anonymous

Plz Help!I Need to find Hypotheses for prob.
If 3x - 7 = -4, then x = 1. Write the hypotheses of this statement
December 2, 2006 by Margie...

math
okay i am comepletely stuck on this math prob....: x + 5y - 10 = 0 x = 2y - 8 i know the answer is -20/7 , 18/7 but i have no idea how they got it so someone PLZ HELP!!!!
February 26, 2008 by shelby

MATH Prob.
What are the odds in favor of drawing a spade and a heart if drawing from a deck of cards w/o replacement?
August 11, 2009 by Twg

prob and stats
The tread lives of the Super Titan radial tires under normal driving conditions are normally distributed with a mean of 34000 mi and a standard deviation of 1700 mi. (a) What is the probability that a tire selected at random will have a tread life of more than 35071 mi? Round ...
October 15, 2010 by br0Ok3

MATH Prob.
A box contains 13 white cards numbered 1 through13. List the sample space of the event choosing one card with a number greater than 6.
August 8, 2009 by Twg

MATH Prob.
Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.
August 8, 2009 by Twg

MATH Prob.
There are 8 members on a board of directors. If they must form a subcommittee of 3 members, how many different subcommittees are possible?
August 20, 2009 by Twg

MATH Prob.
When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting the 4 of spades.
August 20, 2009 by Twg

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, ...
March 18, 2013 by Christina Ms Sue please help

11th grade
hi, i am haveing prob;ems with my math its called solving the quadratic equation but my teacher is not really giving me the attention i need to pass the class but will you help me please
January 28, 2009 by boartavis

accounting ..urgent pls
can you help please.. PROB 1: A, B and C shared the profit of Rs. 9,00,000 in the ratio of 2:2:1 without providing for interest on B’s loan, B granted a loan of Rs. 4,00,000 in the beginning of accounting year. Where as the partnership deed is silent on the interest on loan ...
June 1, 2011 by jessie

prob
a music teacher wants to determine the music performances of students.a survey of wich group would produce a random sample
June 25, 2009 by Anonymous

MATH Prob.
A 6-sided die is rolled. The sides contain the numbers 1,2,3,4,5,6. List the sample space of rolling one die.
August 8, 2009 by Twg

MATH Prob.
Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers. A) 4/3 B) 1/81 C)1/64 D)3/4 I automatically think D.
August 9, 2009 by Twg

Algebra
Need help plz. Don't really get this "reversing the digits" What is this really called in math language? Prob:Find the product of 32 and 46. Now reverse the digits and find the product of 23 an 64. The products are the same. Does this happen with any pair of two digit numbers...
July 7, 2010 by Katti

MATH Prob.
Determine whether the situation calls for a discrete or continuous random variable. A)the cost of a random selected orange B)the Ph level of shampoo
August 20, 2009 by Twg

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