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If 10% of the people who take a certain drug develop at least one of the side effects. Find the probability that in a sample of 20 people who take the drug: A. at most one will suffer side effects b. Exactly four will suffer side effects c. at least one will suffer side effects d. all 20 will suffer side effects Please


Over a long period of time, it has been determined that 70% of Lawyers who take the bar examination pass the examination. Of 500 lawyers who take the examination next, find the probability that 330 or fewer will (Question also contained in attachment)

Probability hypothesis

Statistics >Probability What is the probability of rolling the number 4 (on one die) and the number 3 (on the other die) with a normal pair of dice if you roll the dice 100 times? Statistics > Hypothesis Testing In 1980, the Gallup poll asked Americans whether current safety regulations made nuclear power plants safe enou

Single-event probability, dice

Can you help me understand how to solve this problem? (I need the process and math behind it, not just the answer). Suppose I have a 10-sided die. It's clear enough that the odds of rolling a 1 are 10% for any single roll. What, then, is the likelihood that I will roll a 1 given 10 rolls? Given 5 or 20 rolls? I'd need to sol

Probability Competencies Standards

1. For the eight compentecies listed above, what are the means and standard deviations? What two compentencies have the highest means? What two compentencies have the highest standard deviations? Are these what you would expect from vieving the probabilities presented in this table? 2. If 10 business shcools were selected

Probability of dice, coin flips, and deck of cards.

1. A die is tossed 7 times, find the chance that (a) all rolls show 2 or less (b) none of the rolls show 2 or less (c) not all show 2 or less 2. A coin is tossed 4 times, find the chance that (a) all rolls are Heads (b) the 1st two tosses are Head and last two are Tails (c) the 4th is a Head, given the 1st 3 are

Business Statitsics Problem

A company has a turnover of 10% of their hourly employees annually. Thus for any hourly employee chosen at random management estimates a probability of .1 that the person will not be with the company next year. Choosing three hourly employees at randome use a Tree Diagram and show what is the probability that (1) of them wi

disposal of capacitors with polychlorinated biphenyl (PCB)

Polychlorinated biphenyl (PCB) is among a group of organic pollutants found in a variety of products, such as coolants, insulating materials, and lubricants in electrical equipment. Disposal of items containing less than parts per million (ppm) PCB is generally not regulated. A certain kind of small capacitor contains PCB with

Probability Calculations and Unemployement

Please help with the following problems. Provide step by step calculations. A recently published study shows that a country's true unemployment rate to be 12%. Assume that 300 members of the labour force are selected at random. A) What is the expected number of people unemployed? B) What is the probability that exactly 29

Binomial Probability Distribution

The Complaints Department of a popular used car dealer receives most complaints about the electrical system, particularly the starter. The department sent questionnaires to 300 owners of two-year-old, used, full-sized vehicles. The survey showed 15% of the owners had trouble with the starter. Based on the result of the survey, w

Binomial Probability Distribution Problems

Please help with the following problems. The manager of the local Tim Horton's found that 60% of her employees call in sick on Fridays before the long weekend. Out of a sample of ten employees, what is the probability that: A) exactly three employees will call in sick B) not more than one employee will call in sick. C)

Probability Calculations- Probability distribution, Expected value

Please help with the following problems. Harvard University published the age profile of it's first time students. A random sample of 33 students has ten students in their thirties, fifteen students in their forties, five students in their fifties, and three students in their sixties. A student is selected randomly from the


J&G Painting has hired you as a consultant. You have been gathering data on its painting speed in an effort to help the company be more accurate in submitting bids. Based on data gathered after considering washing, taping, painting, and clean up, one person can paint an average of 100 square feet of indoor wall space per hour (b

Combination probability

A bridge hand consists of 13 cards dealt at random from an ordinary deck of 52 playing cards. a)How many possible bridge hands are there? b) Find the probability of being dealt a bridge hand that contains exactly two of four aces. c) Find the probability of being dealt an 8-4-1 distribution, that is, eight cards of one suit,

Probability questions- Independent events

Jill wants to do her MBA in Statistics at a B.C. university. She applies to two universities that offer post-graduate degrees in Statistics. Assume that the acceptance rate at University A is 25% and at University B is 35%. Further assume that acceptance at the two universities are independant events. A) What is the probability

Anita's, a fast-food chain specializing in hot dogs and garlic fries.

Anita's, a fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering the food "to go") so it can make decisions regarding the possible construction of in-store play areas, the attendance of its mascot Sammy at the franchis

How to set up simulated dice rolling in Excel.

I have to create a simulation in Excel or Crystal Ball (an Excel add-in)only; no other software choices. The task is to simulate a roll of a PAIR of dice--each die having equal probabilities of outcomes: 1, 2, 3, 4, 5 or 6. Perform 50 trials of this simulation. What is the expected value of the dice roll (minimum value

A Discussion On E(X) and Var(X) of X

Let x be a random variable with the following probability distribution: Value x of X......P(X = x) ........-1...............0.05 .........0...............0.05 .........1...............0.60 .........2...............0.05 .........3...............0.15 .........4...............0.10 Find the expectation E(X) an

Probabilities: Senior or Business Major

Suppose that a certain college class contains 59 students. Of these, 35 are seniors, 30 are business majors, and 12 are neither. A student is selected at random from the class. a. What is the probability that the student is both a senior and a business major? b. Suppose that we are given the additional information that the s

Probabilities: Random Selection Problems

Please help with the following problems. Provide step by step calculations. At a certain college, 51% of the students are female and 17% of the students major in civil engineering. Furthermore, 10% of the students both are female and major in civil engineering. a. What is the probability that a randomly selected female stu

Statistics Control charts, probabilities

This is for Quality Control Consider the xbar chart for the piston-ring example as follows, let ring diameter be normally distributed, and the sample size is n = 5. a) Find the two-sigma control limits for this chart. b) Suppose it was suggested that the two-sigma limits be used instead of the typical three-sigma limits.

Mutually exclusive and independant events

Please see the attachment for the question. Let B and C be two events such that P(B) = 0.50 and P(C) = 0.05. a. Determine P(B U C), given that B and C are mutually exclusive. b. Determine P(B U C), given that B and C are independent.


Suppose that A and B are independent events such that P(A)=0.30 and P(B)=0.40. Find the following probabilities... (see attachment for full question)

Probability distribution function

Please see the attached file for full problem description with all proper "X" symbols. --- Can you show me how to complete this kind of problem? Suppose that the genders of the three children of a certain family are soon to be revealed. Outcomes are thus triples of "girls" ( ) and "boys" ( ), which we write , , etc. For ea

Normal distribution, probabilities (3 problems)

Problem 1 We know the IQ of people is normally distributed with mean 120 and standard deviation (SD) of 25. Calculate the probability that an adult will have a ) IQ less than 100 b) IQ greater than 150 c) IQ between 100 and 150 d) Any person with a score over 200 is considered a genius. In a population of 10000

Explanation of odds ratio in a study of smoking.

Those who have quit smoking often return to the habit. The authors of a paper concluded that forbidding smoking in the smoker's residence was a significant predictor of the ability to abstain from smoking. They collected data, calculated statistics, and presented the following as support for their conclusion: OR=1.95 C.I.


PROBLEM 4 Out of 11 people applying for an assembly job, 3 cannot do the work. Suppose two persons will be hired. (a) How many distinct pairs are possible? (b) In how many of the pairs will 0 or 1 people not be able to do the work? (c) If two persons are chosen in a random manner, what is the probability that neither will b