Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
Suppose we want to determine the (binomial) probability(p) of getting 3 heads in 13 flips of a 2-sided coin. what values of n, x and p would we use to look up this probability, and what would be the
A loan officer at a bank rates applicants for credit. Ratings are normally distributed. The mean is 240 and the standard deviation is 60. If 49 applicants are randomly chosen, what is the probabilit
Suppose two dice are rolled. Assume that each possible outcome has probability 1/36. Let A be the event that the sum of the two dice is greater than or equal to 8, and let B be the event that at lea
The lifetime of ZZZ batteries is normally distributed with a mean of 270 hours and a standard deviation of 10 hours. What number of hours would represent the 40th percentile in this distribution?
A population has u=100 and σ=20. If you select a single score from this populaton, on the average, how close woud it be to the population mean? Explain your answer
Analyze and interpret the process behavior charts of selected quarterly earnings data of Southwest Airlines between 2000 and 2005.
The number of books checked out at a public library by a sample of eight primary school children were recorded: Report the mean, variance and standard deviation for this data set.
A frequency distribution was constructed for the ages of all 25 of the CEO's of the Company X. To answer the parts of this problem, use the frequency distribution given below.Calculate the mean age
Test at the 5% level if the proportion of cows with tuberculosis in the herd from which this sample is drawn is 6%.
At a pre-school, teachers have found that, on average, 85% of children will drink milk. In a randomly chosen class of 20 children, what is the probability that at most 16 children will drink milk?
Let A and B be 2 sets, and let P(A) and P(B) denote the probabilities assigned to the 2 sets. If we know that A is a subset of B what is the relationship between P(A) and P(B)?
The man-hour estimate for test and evaluation was based on using expert opinion to come up with optimistic, pessimistic and most likely positions. This resulted in a triangular distribution with a m
Explain the difference between a treatment group and control group. Be specific and thorough, (a couple paragraphs should be fine) are these included in experimental, observational studies, or both?
An airline knows that 5% of the people making reservations on a certain flight will not show up. Consequently, their policy is to sell 52 tickets for a flight that can only hold 50 passengers. What
Suppose a pitcher throws a fastball 80% of the time and a curveball 20% of the time. When it's a fastball, a Home Run is made 8% of the time and when a curveball is thrown, a home run is made 5% of
Describe how you would use a random number table to get a random sample of 50 people who had listed phone numbers in a phone book that had 7500 people with listed numbers.
Ten is the average number of oil tankers arriving each day at a certain port city. The facilities can handle at most 15 tankers per day. What is the probability that on a given day, tankers will hav
The frequency distribution below shows the distribution for suspended solid concentration(in ppm) in river water of 50 different waters collected in September 2011.
The number of cracks in a section of interstate highway that are significant enough to require repair averages 2 per mile. What is the probability that there will be at least 1 crack in the next mil
There are 17 broken lightbulbs in a box of 100 lightbulbs. A random sample of 3 lightbulbs is chosen without replacement. What is the probability that the sample contains no more than 1 broken lightbu
Suppose that a computer programmer, on average, makes 3 errors in 500 lines of code. What is the probability that the programmer will make no errors in 250 lines of code?
A study of various news home pages reports that the mean number of bad links per home page is 0.4. If the errors occur randomly and independently, find the probability that a randomly selected home
A professional hockey player played 20 seasons. The following table shows the number of games in which he played during each of his 20 seasons. How to obtain and interpret the quartiles.
A fair die is thrown until the sum of the results of the throws exceeds 6. The random variable X is the number of throws needed for this. Let F be the distribution function of X. Determine F(1), F(2
The following data lists the avarage monthly snowfall for January in 15 cities around the US:Find the mean, variance and stadard devaition.