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Probability

Binomial Distribution as a Probability Model

In problems 1 and 2, indicate whether a binomial distribution is a reasonable probability model for the random variable X. Give your reasons in each case. 1. The pool of potential jurors for a murder case contains 100 persons chosen at random from the adult residents of a large city. Each person in the pool is asked whether he

Electronics specializes in manufacturing electronic components

Please check the attachment. 1) Todays electronics specializes in manufacturing modern electronic components. It also builds the equipment that produces the components. Phyllis Weinberger, who is responsible for advising the president of Today's Electronics on electronics manufacturing equipment, has developed the following tab

Statistics questions

Can you help me with statistic questions? *The standard deviation of a point estimator is called the _______? (A) standard error (B) sample mean (C) population standard deviation (D) probability distribution *The t-distribution can be used with small samples for establishing confidence intervals for the population mean, pr

Completion Time of Projects

A project was planned using PERT with three time estimates. The expected completion time of the project was determined to be 40 weeks. The variance of the critical path is 9. What is the probability that the project will be finished in 46 weeks or less? A. 2% B. 73% C. 98% D. impossible to determine with this informati

Probability in 200 Dice Rolls

Find the probability that in 200 tosses of a fair six-sided die, a five will be obtained at most 40 times. Please provide the detail of how to calculate.

The difference between a discrete and a continuous random variable.

1) Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable. 2) Determine whether each of the distributions given below represents a probability distribution. Justify your answer. a) x 1 2 3 4 P (x) 1/8 1/8 3/8 1/8 b) x 3 6 8 P (x) 0.2

Probability that Mean Daily Precipitation will be 0.095+

According to records, the amount of precipitation in a certain city on a November day has a mean of 0.10 inches, with a standard deviation of 0.06 inches. What is the probability that the mean daily precipitation will be 0.095 inches or more for a random sample of 40 November days (taken over many years)? Carry your interm

Binomial probability

The unemployment rate in a city is 13%. Find the probability that more than 2 out of 10 people from this city sampled at random are unemployed. Round your answer to four decimal places.

Probability of Prophecy Fulfilled

Based on the below account of prophecy and fulfillment how do I write out the answer based on the formula to solve the equation. I guess for statistics sake we could say that he could have ridden in on a camel, horse, or donkey. How do I go about doing this? Thanks for your help? SO would the probability be .50 a yes he w

Fluctuation in the prices of precious metals such as gold have been empirically shown to be well approximated by a normal distribution when observed over short interval of time. What is the probability that the client's gold will be sold the next day?

Fluctuation in the prices of precious metals such as gold have been empirically shown to be well approximated by a normal distribution when observed over short interval of time. In May 1995, the daily price of gold (1 troy ounce) was believed to have a mean of $383 and a standard deviation of $12. A broker, working under these a

There is a 20% probability of a rain tomorrow means that ...

WHICH ANSWER IS RIGHT 1, 2, OR 3 AND WHY? There is a 20% probability of a rain tomorrow means that: 1. Tomorrow it will be raining during 0.2 of the day, and the rest of the day it will be clear; 2. Out of the next 5 days, one day it will be raining ; 3. According to the records, if a weather like one we have today occu

American Intellectual Union: Employee Job Satisfaction Report

Compose an email to the head of the American Intellectual Union which discusses the following: Begin your email to AIU by first providing an overview of the database, i.e. a story. Be sure to include information about how you would use the concept of probabilities to apply to profiles for hiring more satisfied individual

Normal Distribution

You're not sure if you should buy a stock and need to discover the probability of the stock having a positive return (based on one year). The annual rates are: mean=4% & standard deviation = 5%

Wages in Construction Industry

Wages in the construction industry average $11.90 per hour with a standard deviation of $1.40. What percent of workers make less than $10.50 per hour (z = -1.00)? 2. The probability of employees taking the time to fill out a survey at Comptex is 17%. There are 5 people in the department managed by Alice. What is

Lognormal Distribution & Probability

1. If X, Y are lognormal distribution, what the distribution of X/Y? 2. what is the probability of getting 40 or less heads in 100 coin tosses. What distribution is this. With what other distribution can you approximate this. What is the final probability. 3. Which is greater exp((a+b)/2) or (exp(a)+exp(b))/2 4. what

Your store wraps gifts 2 hour after they are recieved.

Your store wraps gifts 2 hour after they are recieved. The distribution of times is approximately normal, the standard deviation is 15 mins, today you wrapped 120 gifts (Empirical rule). a. how many gifts would expect to wrap within 2 hours 15 mins of being received. b. how many gifts would you expect to be wrapped within 1

Let X be a random variable representing the sum of trials.

Let X be a random variable representing the sum of trials. Then X is a binomial random variable if all of the following are satisfied except a. no two trials can have the same outcome b. p, the probability of "success" on any trial is the same for all trials c. each trial has exactly two possible outcome

Probability of Smokers

For questions 1 through 3 use the table below. The table shows the number of smokers and nonsmokers by gender among 220 people. Assume one person is chosen at random from the 220. Smokers Nonsmokers Totals Male 40 60 100 Female 40 80 120 Totals 80 140 220 1. If a smoker is chose

Popularity of Presidential Candidates

Nine presidential candidates are ranked in popularity according to a recent poll and the top three in order are announced: George (1); Thomas (2); and James (3). If three candidates were picked at random, what is the probability of picking those three and in that order?