A random sample of 1001 University of California faculty members taken in December 1995 was asked, "Do you favor or oppose using race, religion, sex, color, ethnicity or national origin as a criterion for admission to the University of California?" (Roper Center, 1996). 52% responded "favor". a.What is the population for this
1. A recent survey of 1000 adults shows that 58% believe airplanes to be the safest mode of travel. Construct a 99% confidence interval for the proportion of adults who think airplanes are the safest mode of transportation. 2. An aptitude test has a mean score of 80 and a standard deviation of 5. The population of scor
1. A coin is flipped 50 times. a)Calculate the probability that exactly 10 coin flips are heads. b)Calculate the probability that 10 coin flips or less are heads. 2.The expected number of work accidents in a year is 11.5. a) Calculate the probability that there are exactly 10 accidents in a randomly selected year.
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
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
About 8% of males are colorblind. A researcher needs some colorblind subjects for an experiment, and begins checking potential subjects.
Dear OTA, Please help me with the following question. ---------------- About 8% of males are colorblind. A researcher needs some colorblind subjects for an experiment, and begins checking potential subjects. A). what's the probability that she won't find anyone colorblind among the first 4 men she checks? B). what
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
Evaluate the expression 6P4 (permutations).
The Beanstalk Club, a social organization for tall people, has a requirement that women must be at least 70 inches tall.
Please see attachment for full problem description. I need help with figuring out probability and normal distribution problems. For the following problems, determine whether a probability distribution is given. In those cases where a probability distribution is not described, identify the requirements that are not satisfied
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
Fourteen Multiple Choice Mathematical Finance Questions. See Attached.
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.
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
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
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.
A rainstorm in Portland, Oregon, has wiped out the electricity in about 7% of the households in the city. A management team in Portland has a big meeting tomorrow, and all 6 members of the team are hard at work in their separate households, preparing their presentations. What is the probability that none of them has lost electri
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
According to catalyst data, in sample of 1,000 corporate officer's at the 500 largest U.S. firms, how many would you expect to be women?
According to Catalyst, a New York based women's advocacy and research group, 12% of all corporate officer's at the 500 largest U.S. corporations in 1999 were women, compared to 8% in 1995. a.) According to catalyst data, in sample of 1,000 corporate officer's at the 500 largest U.S. firms, how many would you expect to be wo
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
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
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
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%
Problem 3 Jim is considering pursuing an MS in Information Systems degree. He has applied to two different universities. The acceptance rate for applicants with similar qualifications is 20% for University X and 45% for University Y. What is the probability that Jim will be accepted at one and only one university? Problem 5 T
The amount of time ships spend at the Philadelphia dockyard follows an exponential distribution and the average time spent in the dockyard is 3.1 days.
Problem 1 The amount of time ships spend at the Philadelphia dockyard follows an exponential distribution and the average time spent in the dockyard is 3.1 days. a. What is the probability that a randomly selected ship spends no more than 1.5 days at the dockyard? b. What is the probability that a randomly selected ship spend
A standardized test consists entirely of multiple-choice questions, each with 5 possible choices. You want to ensure that a student who randomly guesses on each question will obtain an expected score of zero. How would you accomplish this?
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
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. 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. 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
If event B is the complement of event A , then?