random
4,662 results, page 44

Statistics (44)
The traveltowork time for residents of the 15 largest cities in the United States is reported in the 2003 Information Please Almanac. Suppose that a preliminary simple random sample of residents of San Francisco is used to develop a planning value of 6.35 minutes for the ... 
algebra
a bank gives away 1 out of 5 cards evry time a client deposits. there is an equal chance of getting one of the cards. predict the number of times a client will have to make a deposit to get all five cars. which can NOT be considered a trial for the simulation. 1) use digits 1... 
Math (Pease Help! 2 questions!)
A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. c) What is the probability of selecting a purple marble and then a white marble? c) What is the probability of selecting ... 
Statistics
In 1990, the average annual Medicare spending per enrollee was $3267; in 2003, the average annual Medicare spending per enrollee was $6883. Supposed you hired a consulting firm to take a sample of fifty 2003 Medicare emrollees to further investigate the nature of expenditures... 
math
A score of 243 is a "basic" reading level. Scores for a random sample of 3000 students had a xbar = 250 with a standard error 1.0 The 99% confidence interval for the mean score all students in the city is 247.4 to 252.6. Ques: Is there good evidence that the mean for all ... 
Statistics
Suppose it is observed that, on average, 35 people are admitted to the intensive care unit of a particular hospital every week. Let the random variable X represent the number of people admitted to this intensive care unit on any particular day. a) What is the distribution of X... 
NEED HELP PLEASE CHECK TO SEE IF THIS CORRECT
A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of the game and missed 3 of them. The fans booed. What is the probability of her missing 3 (or more) free throws out of 5? Set up and conduct a simulation (... 
algebra
a bank gives away 1 out of 5 cards evry time a client deposits. there is an equal chance of getting one of the cards. predict the number of times a client will have to make a deposit to get all five cars. which can NOT be considered a trial for the simulation. 1) use digits 1... 
Statistics
Did you ever buy an incandescent light bulb that failed (either burned out or did not work) the first time you turned the switch on? When you put a new light bulb into a light fixture, you expect it to light and most of the time it does. Consider 8packs of 60watt bulbs and ... 
lotto 5/90
The first 5 numbers at random in week 1 is 8647336761 and last 5 numbers the same week 1 is 1480614382 The first 5 numbers in week 2 735518226 The last 5 numbers the same week 2 6429838611 The first 5 numbers in week 3 27668769 The last 5 numbers the same ... 
artist
1. The artwork pictured here best represents which message? a) Ideas and creativity can be shown with many different tools. b) It is important to use one type of tool because you understand how to use it. c) People can be limited by their ideas. d) Diversity is distracting. 2... 
MATH HELP?!?!?!
1. Maria has the following scores in her mathematics class: 86 75 97 58 94 and 58 a: Find the mean median and mode b: Should Maria's Mathematics class teacher use mean median or mode of the exam to convince Maria that she needs to study more regularly? 2. A researcher tagged ... 
probability
out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was a. taking just ... 
Check Answers PLEASE
Paula asked 30 students what they ate for lunch. All the students had at least a sandwich, salad or fruit. ********************************* QUESTION A Draw a Venn Diagram. * * * * * * * * * * * * * * * * * THIS IS THE INFORMATION FROM THE DIAGRAM: 5 students had a sandwich, ... 
Precalculus
1. Gas Mileage Problem The EPA efficiency rating Ina particular model of new car says that the car is expected to get 22.7 miles per gallon (mpg) of gasoline. Assume that the standard deviation is 1.4 mpg and that the actual mileage are normally distributed about 22.7. The ... 
Precalculus
1. Gas Mileage Problem The EPA efficiency rating Ina particular model of new car says that the car is expected to get 22.7 miles per gallon (mpg) of gasoline. Assume that the standard deviation is 1.4 mpg and that the actual mileage are normally distributed about 22.7. The ... 
precaculus
1. Gas Mileage Problem The EPA efficiency rating Ina particular model of new car says that the car is expected to get 22.7 miles per gallon (mpg) of gasoline. Assume that the standard deviation is 1.4 mpg and that the actual mileage are normally distributed about 22.7. The ... 
Maths
Please help. I completed 16 but these 4 are hard; the wording confusing. 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a hotel (owned by another player). Of the 20 ... 
MATH
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information: $231,500 $279,900 $... 
Computers C
Backgound The employees can be any one of the two types: 1) FullTime Salaried (FTS) and 2) PartTime Hourly (PTH). Currently, there are totally 1050 FTS employees and 274 PTH employees in a company. The company plans to add up to 50 new employees FTS employees are paid in a ... 
Math Stats
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information: $231,500 $279,900 $... 
math
The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario... 
math
08.03)Esther wants to know if the number of words on a page in her language arts book is generally more than the number of words on a page in her social studies book. She takes a random sample of 25 pages in each book and then calculates the mean, median, and mean absolute ... 
probs & stats
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard... 
Statistical concept 689599.7
1. A student taking a midterm exam in Ancient History comes to two questions pertaining to a lecture that he missed, and so he decides to take a random guess on both questions. One question is truefalse and the other is multiple choice with four possible answers. What is the ... 
Statistics
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard... 
Probability
Consider a fire alarm that senses the environment constantly to figure out if there is smoke in the air and hence to conclude whether there is a fire or not. Consider a simple model for this phenomenon. Let Θ be the unknown true state of the environment: Θ=1 means ... 
mathematic
In surveys about sensitive topics, respondents are sometimes given ways to “hide” their answers from the surveyor. In a survey of taxpayers, one of the questions is, “Did you cheat on your taxes?” To answer, the respondent is asked to toss a coin. If it lands heads, ... 
math
In surveys about sensitive topics, respondents are sometimes given ways to “hide” their answers from the surveyor. In a survey of taxpayers, one of the questions is, “Did you cheat on your taxes?” To answer, the respondent is asked to toss a coin. If it lands heads, ... 
math
Three people are to be selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person selected gets the third ... 
Probability
Let X be a continuous random variable. We know that it takes values between 0 and 3 , but we do not know its distribution or its mean and variance. We are interested in estimating the mean of X, which we denote by h . We will use as a conservative value (upper bound) for the ... 
math 3
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information: $231,500 $279,900 $... 
Maths
Paula asked 30 students what they ate for lunch. All the students had at least a sandwich, salad or fruit. ********************************* QUESTION A Draw a Venn Diagram. * * * * * * * * * * * * * * * * * THIS IS THE INFORMATION FROM THE DIAGRAM: 5 students had a sandwich, ... 
Math
In a computer lab there are two dierent printers. From 1pm2pm Printer1 receives on average 12 print jobs and Printer2 receives on average 5 print jobs. Assume the number of print jobs requested on Printer1 and on Printer2 are independent of each other. (a) Defi ne random ... 
Statistics (random variable)
A contractor is interested in the total cost of a project on which he intends to bid. He estimates that materials will cost rs 25,000 and that his labour will be rs900 per day. If he the project takes X days to complete,the total cost of the project (in rupees) will be given ... 
college mathematics
Three people are to be selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person selected gets the third ... 
Probability
CHECK ANSWERS PLEASE ********************************** Paula asked 30 students what they ate for lunch. All the students had at least a sandwich, salad or fruit. ********************************* QUESTION A Draw a Venn Diagram. * * * * * * * * * * * * * * * * * THIS IS THE ... 
C programming
Help would be grately apreciated on this problem thank you! Backgound The employees can be any one of the two types: 1) FullTime Salaried (FTS) and 2) PartTime Hourly (PTH). Currently, there are totally 1050 FTS employees and 274 PTH employees in a company. The company plans... 
Statistics
You are interested in estimating the mean of a population. you plan to take a random sample from the population and use the samples mean as an estimate of population mean. Assuming that the population from which you select your sample is normal, which of the statements about ... 
STATISTICS
The following data represents the monthly natural gas consumption (in hundreds of cubic feet) for a family for a random sample of nine months selected from five years of data. The other variable is Degreedays which is a measure of temperature. Degreedays are the number of ... 
Statistics
The nicotine content in cigarettes of a certain brand is normally distributed with mean (in milligrams) μ and standard deviation σ = 0.1. The brand advertises that the mean nicotine content of their cigarettes is 1.5, but measurements on a random sample of 400 ... 
business statistics
The International Council of Shopping Centers reports that the average teenager spends $39 during a shopping trip to the mall. The promotions director of a local mall has used a variety of strategies to attract area teens to his mall, including live bands and “teenage group... 
math
Three people are being selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person selected gets the third ... 
Statistics
An entertainment company owns and operates movie theaters in Wyoming. The president of the company is concerned that film rentals are hurting the business. They directed a staff member to estimate the total number of films rented by households in Wyoming in a particular month... 
Probability
4.3. In a certain college town, 27.5 percent of the students failed Mathematics (Math), 19.8 percent failed Biology (Bio), and 11 percent failed both Math and Bio. A student is selected at random. Let A represent the event of failing Math, so that A' is the probability of ... 
Probability/Statistics
The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario... 
Probability/Statistics
The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario... 
MTH233/statistics UOP
A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon. You believe the claim is incorrect and find that a random sample of five cars has a mean gas mileage of 19 miles per gallon and a standard deviation of 4 miles per gallon. Assume... 
Statistics
I have completed 6 questions but after 2 hours still cannot do these 4 questions. Please help 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a hotel (owned by another... 
Stat HW for.
1. A student taking a midterm exam in Ancient History comes to two questions pertaining to a lecture that he missed, and so he decides to take a random guess on both questions. One question is truefalse and the other is multiple choice with four possible answers. What is the ... 
Chemistry
We have been getting numerous questions like this on assignments and I can't figure them out. Its like I know that there some way connected but I can't figure it out. This is for Chemistry in highschool and its likea review and so they are not going over it but I would still ... 
statistics
2) Two individuals are running for mayor of Tallahassee. You conduct an election survey (N = 561) a week before the election and find that 57% of the respondents prefer candidate A. Can you predict the winner (α = 0.01)? (Hint: Use 50% as the proportion of votes needed ... 
math please help
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information: $177,500 $279,900 $... 
AE
· Choose one of the following issues regarding students’ rights and teachers’ responsibilities: o Random student locker searches without permission ( I chose this one) o Student safety on field trips o Student news articles and freedom of speech · Answer the following: ... 
Statistics
According to a study by the Centers for Disease Control, the national mean hospital stay after childbirth is 2.1 days. Reviewing records at her own hospital, a hospital administrator calculates that the mean hospital stay for a random sample of 81 women after childbirth is 2.3... 
statistics
in certain manufacturing processes parts must be machined tonwithin specified tolerences. the parts must have a mean length of of six inches plus or minus 0.26 inches .A SAMPLING PROCEDURE HAS BEEN ESTABLISHED to determine wether the ten parts are within the specified ... 
Computers(Java Programming)
Service Class: Lottery Write a Lottery class that simulates a lottery. The class should define an array of five integers named lotteryNumbers. The constructor should use the Random class (see the Java API) to generate a random number in the range of 0 to 50 for each element on... 
Probability
Consider a fire alarm that senses the environment constantly to figure out if there is smoke in the air and hence to conclude whether there is a fire or not. Consider a simple model for this phenomenon. Let Θ be the unknown true state of the environment: Θ=1 means ... 
statistics
There are two boxes, each with several million tickets marked “1” or “0”. The two boxes have the same number of tickets, but in one of the boxes, 49% of the tickets are marked “1” and in the other box 50.5% of the tickets are marked “1”. Someone hands me one of... 
Chemistry(Please check)
1) choose the correct statement about the postulates of kinetic theory of gases. a) a sample of a gas consists of a small number of large particles close together. b) the movement of gas molecules is predictable, not random. c) when gas molecules collide, they permanently ... 
Statistics/Probability
1. Two roommates, roommate A and roommate B, are about to go cruising with a mutual friend and are arguing over who gets to sit in the front seat. Roommate A suggests a game of rockpaperscissors to settle the dispute. Consider the game of rockpaperscissor to be a ... 
Statistics need help
Need help please on these questions: 1. A poll at Steve's high school was taken to see if students are in favor of spending class money to expand the juniorsenior parking lot. Steve surveyed 6 random students from the population. 85% favored the expansion, while 15% opposed ... 
Statistics
Problem 1 Use the Old Faithful data labelled Duration as a sample for problem 1. a. Determine the proportion of instances that the duration was less than 240 seconds. Also express the proportion as a percent. (hint: proportion is number of successes divided by total number. b... 
Tree diagrams
Three people are being selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person selected gets the third ... 
Math
Ms. Tenley's class has 25 students. Two of the students have visited no other countries other than the United States. Five of the students have visited at least 1 other country. Ten students have visited 2, four students have visited 3, 3 students have visited 4, and 1 student... 
statistics
A professional employee in a large corporation receives an average of = 45 emails per day. Most of these emails are from other employees in the company. Because of the large number of emails, employees find themselves distracted and are unable to concentrate when they ... 
Statistics
a random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 50% of the students plan to work, 25% of the students plan to continue in school, and 25% of the students plan to take some time ... 
math
1.) In a shipment of alarm clocks, the probability that one alarm clock is defective is 0.04. Charlie selects three alarm clocks at random. If he puts each clock back with the rest of the shipment before selecting the next one, what is the probability that all three alarm ... 
Business Statistics
The manager of a vacation resort has claimed that, on average, a guest spends at least $3000 at the resort during a one week stay, including meals and entertainment. A member of the accounting staff does not believe the amount is that high. They authorize you to settle their ... 
Statistics
For all of the following use the five step process to solve the problem in the question, that is, state the null hypothesis, the alternative hypothesis, the level of significance and the type of test (ztest, ttest, pvalue, confidence limit and whether it is two tailed, one... 
Statistics
When consumers apply for credit, their credit is rated using the FICO score. A bank manager used a random sample of the credit scores of 18 customers and determined the following 95% confidence interval: (613.6, 708.0) If the sample used 45 customers rather than 18 customers, ... 
Probability
Let X be a continuous random variable. We know that it takes values between 0 and 3, but we do not know its distribution or its mean and variance. We are interested in estimating the mean of X, which we denote by h. We will use 1.5 as a conservative value (upper bound) for the... 
Math
3.22 Defective rate. A machine that produces a special type of transistor (a component of computers) has a 2% defective rate. The production is considered a random process where each transistor is independent of the others. (a) What is the probability that the 10th transistor ... 
Statistics
There are two boxes, each with several million tickets marked “1” or “0”. The two boxes have the same number of tickets, but in one of the boxes, 49% of the tickets are marked “1” and in the other box 50.5% of the tickets are marked “1”. Someone hands me one of... 
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 ... 
Intro to probability,
My main problem is deciding with discrete distribution to use: BERNOULLI, BINOMIAL, DISCRETE UNIFORM, GEOMETRIC NEGATIVE BINOMIAL, OR POISSON. Every time I choose one, it's the wrong one. Is there some way I can easily find out which one to use. Because what I do now is I ... 
probability
wooden balls are numbered 175. Five balls are drawn at random. What is the probability of drawing 5 consecutive numbers if no replacement occurs.? The first ball has a 1/75 chance of being selected. The second ball can be from either above or below the first, so it has a 2/74... 
Some algebra please help me!
1) Find the surface area of a sphere with a radius of 8 cm. A 267.9 cm B 803.8 cm *** C 2143.6 cm D 2010. cm 2) Find the surface area of a sphere with a radius of 4 ft. A 452.2 m B 150.7 m C 113.0 m D 904.3 m *** 3) Find the volume of a sphere with a radius of 4 ft. A 33.5 ft... 
math
A bag contains 8 blue coins and 6 red coins. A coin is removed at random and replaced by three of the other color. a) What is the probability that the removed coin is blue? b) If the coin removed is blue, what is the probability of drawing a red coin after three red coins are ... 
statics
4. In a certain game of chance, your chances of winning are 0.2. If you play the game five times and outcomes are independent, the probability that you win at least once is 5. A set of data is found to have a sample standard deviation of 25. Suppose 9 were added to each of the... 
Math
1.During the month of June, Ava kept track of the number of days she saw birds in her garden. She saw birds on 18 days of the month. What is the experimental probability that she will see birds in her garden on July 1? my answer: 3/5 2.A rectangle has a width of 4 inches and a... 
STATS Math
Suppose a simple random sample of size n=150 is obtained from a population whose size is N=20,000 and whose population proportion with a specified characteristic is p=0.8. Please answer questions (1) through (5) below. (1) describe the sampling ditriribution of p^ (choose the ... 
Statistics
part 2  An entertainment company owns and operates movie theaters in Wyoming. The president of the company is concerned that film rentals are hurting the business. They directed a staff member to estimate the total number of films rented by households in wyoming in a ... 
statistics.urgent please help..
A local college cafeteria has a selfservice soft icecream machine. The cafeteria provides bowls that can hold up to 16 ounces of icecream. The food service manager is interested in comparing the average amount of icecream dispensed by male students to the average amount ... 
Statistics
An insurance company wishes to examine the relationship between income (in $,000) and the amount of life insurance (in $,000) held by families. The company drew a simple random sample of families and obtained the following results: (Family) (Income) (Amount of life insurance) ... 
Algebra 2
A biologist has determined that a particular osprey has a 70% chance of catching a fish on any given day. Carry out a simulation of 20 trials using the random number table below to find the probability that the osprey will actually catch a fish on all of the next three days. ... 
Math
A biologist has determined that a particular osprey has a 70% chance of catching a fish on any given day. Carry out a simulation of 20 trials using the random number table below to find the probability that the osprey will actually catch a fish on all of the next three days. ... 
maths (probability)
1) A basket contains 3 red and 2 yellow apples. Two apples are chosen at random. Find the following probabilities: a) P(one red, one yellow) b) P(at least one red) 2) A card is drawn from a standard deck. Find the following probabilities: a) P(a jack or a king) b) P(a jack or ... 
maths
1. A die labelled A has one face marked 1, one face marked 2 and the other four faces marked 3. A die labelled B has four faces marked 2 and two faces marked 3. The dice A and B are thrown. Calculate the probability is 5. I got 18/36 2. There are 12 boys and 20 girls in a ... 
statistics
According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random samples of size 50 are selected. a) What proportion of the samples will have less than 15% of customers who will make a purchase after visiting the web site? a... 
math
in a certain town 40% of men are smokers. It is known that 6% of men in this town have lung disease. Of those men having lung disease 85% are smokers. A man is selected at random from this town. Consider the events: D<<the selected man has a lung disease>> and S<... 
Stats Math 3
Suppose a simple random sample of size n=150 is obtained from a population whose size is N=20,000 and whose population proportion with a specified characteristic is p=0.8. Please answer questions (1) through (5) below. (1) Describe the sampling distribution of p^ (choose the ... 
Statistic
Using this TABLE 126 for the following questions: The dean of a college is interested in the proportion of graduates from his college who have a job offer on graduation day. He is particularly interested in seeing if there is a difference in this proportion for accounting and... 
Precalculus
1. Here is the frequency table for this distribution (the frequency histogram is not shown): Since I cannot make a table on this forum,the format will be like this: Time(minutes)and Number of telephone calls. 0<t<=5 and 12 telephone calls 5<t<=10 and 4 telephone ... 
Statistics  Probability
I need to calculate P(man is a ballet dancer and a musical performer) given the following information... In a random sample of male and female graduates of the New York School for the Arts between the ages of 2235 you know that: the probability a man is a ballet dancer is 0.... 
statistics
Prospective Cohort Study The following tables show the crude and sexspecific results from a Prospective Cohort Study that examines the association between a binary exposure (E) and the development of a disease (D) during 20 years of followup. Full Data: SexSpecific Data: ... 
Statistics
A breathalyser test is used by police in an area to determine whether a driver has an excess of alcohol in their blood. The device is not totally reliable: 7 % of drivers who have not consumed an excess of alcohol give a reading from the breathalyser as being above the legal ... 
Statistics
A simple random sample of 50 female 14yearolds is selected. The sample mean height of the girls is found to be 62 inches. Assume the height of 14yearold girls is normally distributed with a standard deviation of 5 inches. 1. Based on these data, a 95% confidence interval ... 
statistics
1. In a biology class, your final grade is based on several things: a lab score, scores on two major tests and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 25% of your total grade, each major test is worth 22.5% ... 
Statistic
In a population of over 15,000 patients, the distribution of systolic blood pressure follows the normal curve. Investigators believe the average systolic blood pressure in the population is 120 mm. The investigators take a simple random sample of 6 patients from this ...