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Mathematics Questions and Answers March 09, 2023

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A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a questionnaire designed to measure empathy, the mean score for the general population is 51.98. Random sampling of 76 scores obtained from individuals who were bullied yielded a mean of

EXAMPLE Introduction Figure 1 Assumptions Analysis, results and findings Recommended corrective actions and improvements discussed Correlation, if any, between defects and x-bar and/or delta charts discussed (Information above will come from the questions asked in numbers 2 and 3.) Conclusion/Summary I went ahead and attached the pareto chart.

The probability is 0.45that a traffic fatality involves an intoxicated driver. In tentraffic fatalities, find the probability that the number, X, which involve an intoxicated driver isa. exactly three; at least three; at most three.b. between twoand four,inclusive.c. Find the mean of the random variable X.d. Find the standard deviation of the

Experiments on learning in animals sometimes measure how long it takes a mouse to find its way through a maze. Long experience indicates that the mean time is 20 seconds for one particular maze. A researcher thinks that playing loud rap music will, on average, cause mice to take longer to complete the maze. (a) State the null and the alternative

According to a study carried out by the firm Optima Groupe Conseil for the newspaper Les Affaires, the average income per household in the Trois-Rivieres-Ouest geographic area is $ 55,577 (this value was obtained from the Statistics Canada database - 2001 census). Let us assume that the standard deviation of the income per household is $ 4,000. A

A box contains 6 red balls, 7 green balls and 5 blue balls. Each ball is of different size. The probability that the red ball selected is the smallest red ball is a) 1/8 b) 1/3 c) 1/6 d) 2/3

Number of customer in the store during a day follows Normal distribution with mean M and standard deviation . Find probability that number of customer during a day will be: 1. less than x1 P(x < x1) 2. greater than x2 P(x > x2) 3. between x1 and x2 P(x1 < x < x2) For M, , x1, x2 use numbers assigned for you in the table below. M=20 =6 x1=17 x2=26

The American Airlines flights would like to study the departure delay time. They would like to test the claim that the mean departure delay time for all flights from New York to Los Angeles is less than 12 min. They recorded 64 different departure delay times and found the mean is 10 min and the standard deviation is 30 min. Use a 0.01

You are trying to estimate the average amount a family spends on food during a year. In the past, the standard deviation of the amount a family has spent on food during a year has been f$sigma=f$ $1200. If you want to be 99% sure that you have estimated average family food expenditures within $60, how many families do you need to survey? Place

Given the information, n= 22 , x bar = 72.3 , and standard deviation = 6.4 (PLEASE SHOW HOW TO GET THE ANSWER USING THE CALCULATOR) a) find the 90% confidence interval for u b) find the 95% confidence interval for u c) find the 99% confidence interval for u

2. We will reject a hypothesis statistically when the probability of a particular observed event is extremely small; in other words, when it is highly unlikely to occur by chance. Note that a legal verdict of not guilty does not say the accused is innocent. Why do you think that is? What is the equivalent statistical statement when we do not

6. Either Laura is a good girl or Rob is a good boy. If Danny cries, then Laura is not a good girl. Rob is not a good boy. Does Danny cry? determine whether the arguments are valid and justify your reasoning. 8.Hypotheses: if Danny is affluent, he is either a snob or a hypocrite, but not both. Danny is a snob and is not a hypocrite. Conclusion:

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7/17/2016 Thinkwell | 1700 Cumulative Calculus II Final Exam 1700 Cumulative Calculus II Final Exam Take: 1 | 07/17/16 Directions: I would recommend that you do the following: 1) Complete all of the preparation a head of time. There is a 3 HOUR TIME LIMIT. Get a printout of the test to take with paper and pencil . 3) Return here to add your

Sample evidence is statistically significant at the alphalevel only if the pvalue is larger than alpha . True or false?

Carpet City Month 1 2 3 4 5 6 7 8 9 3 mos moving Demand for Soft Shag Carpet (1,000 yd.) average forecast 10 9 8 9 10 12 14 11 Weighted 3 mos moving average forecast Please apply weights stated in the problem Error abs() Error abs() Weights: 0.55 (most recent month), 0.35, 0.10 Compute MAD on 3 mos moving average Note: average over month 4 through

Hey, how can I find the past midterm about gwu stat 1053; the prof is amini. Thank you so much.

Question 3 (1 point) In a Harris poll of 500 human resource professionals, 30% said that body piercings and tattoos were big grooming red flags. Use a 0.01 significance level to test the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. Answer question 1 to 4 to complete the hypothesis

To prepare for this Assignment: Use the Course Guide and Assignment Help found in this weeks Learning Resources and search for a quantitative article that includes multiple regression testing. For this Assignment: Write a 2- to 3-page critique of the article. In your critique, include responses to the following: Why did the authors use multiple

LAB 4.1 (3.0 HOURS) Assessment Preparation Checklist: Perform the following tasks to prepare for this assessment: Read Chapter 2, Sections 2.1-2.7, of your textbook, Algebra & Trigonometry. These sections will help you understand how to interpret information from a graph and make predictions by modeling data with functions. Review the lesson for

A real estate investor has the opportunity to purchase land currently zoned as residential. If the county board approves a request to rezone the property as commercial within the next year, the investor will be able to lease the land to a large discount firm that wants to open a new store on the property. However, if the zoning change is not

ecent crime reports indicate that 5.0 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution. a. Calculate the probability exactly five thefts occur in a minute.(Round your answer to 3 decimal places.) Probability b. What is the

The issue of how much should be spend to solve particular U.S. social problems is a complex matter, and people have diverse and conflicting ideas on these issues. Race and social class have an impact on how people perceive the extent of government spending. The 2006GSS contains sev3eral questions on these topics. For this exercise, we present race

A science geek brews tea at 195 F, and observes that the temperature T(t) of the tea after tt minutes is changing at the rate of T(t)=7e^0.03t F/min. What is the average temperature of the tea during the first 17 minutes after being brewed? Round your answer to the nearest hundredth of a degree. Please explain each step

The first four questions are true and false 1. In order to tell the impact of a change in a constraint coefficient, the change must be made and then the model resolved. 2. Any change to the objective function coefficient of a variable that is positive in the optimal solution will change the optimal solution. 3. A marketing research firm must

1. Consider the situation when a couple has 3 children. Assume that boys and girls are equally likely and the gender of any child is not influenced by the gender of any other child. (a) Among three children, there is exactly one girl. (b) Among three children, there are exactly two girls. (c) Among three children, all are girls. 2. The principle

1. A machine is designed to produce ball bearings having a mean diameter of 0.574 centimeter with a standard deviation of 0.008 centimeter. To determine whether the machine is in proper working order, a sample of six ball bearings is taken every hour, and the mean diameter of each sample is recorded. (Note that each sample consists of six

You place a mirror on the ground 100ft away from a flag pole, You then back up from the mirror until you see the top of the flag pole in the mirror. If the distance from your eyes to the ground is 5 ft and you are standing 14ft from the mirror, how tall is the flag pole to the nearest foot? Must show you worked out problem

Discussion Question #1: Best Benefit Details For this discussion activity, you will be analyzing 3 different types of exercise: specific exercise equipment that you may use in your home such as the Bowflex Home Gym, a gym membership, and the 7 minute workout For each type of exercise, discuss the cost of exercise (consider both expense, and time

The presence of student-owned information and communication technologies (smartphones, laptops, tablets, etc.) in today's college classroom creates learning problems when students distract themselves during lectures by texting and using social media. Research on multitasking presents clear evidence that human information processing is insufficient

Fiam Industries projects the following revenues from their competitor's possible strategies choices: Competitor's Strategy Probability of Competitor's Strategy Fiam 's Revenue ($millions) Expand Production 0.19 1,187.1 Reduce Production 0.2 3,005.6 Fiam projects revenue of $2,428 million if their competitor's production is unchanged. Further, Fiam

Mark is working with a realtor to find a location for the toy store he plans to open in his town. He is looking for a place that is either in, or not too far from, the center of town and one that would attract the right kind of foot traffic. Which of the following locations should Mark's realtor call to his attention? A. a storefront in a new

You are hired by a Danish distributor of consumer goods, Dicg, to improve their forecasting capabilities. You are tasked with coming up with quarterly forecasts for an item that appears to have level, seasonality, and trend. While the company does have an existing Holt-Winter forecasting model, no one knows what the parameters (Alpha, Beta, or

Kingsoft Office Answer Report Worksheet: [Book1.xls]Sheet1 Report Created: 7/16/2016 2:29:40 PM Result: Solver found a solution. All Constraints and optimality conditions are satisfied. Solver Engine Engine: Simplex LP Solution Time: 4.459 Seconds. Iterations: 5 Subproblem: 0 Solver Options Max Time 4 sec, Iterations Unlimited Max Subproblems

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A biologist estimates that 50% of deer in the region carry a certain type of tick. For a sample of 300 deer selectetd at random, what is the chance that 155 or fewer deer have this tick?

What is the meaning of Covariance in statistics? Also canI have an explanation as to why a covariance of 0 implies independence but not the other way around?

A line passes through the point (4,-8) and has a slope of -5/4. Write an equation in slope-intercept form for this line.

MAT301 ASSIGNMENT 4 DUE DATE: MONDAY JULY 20, 2015 AT THE BEGINNING OF LECTURE Question 1. (a) Prove that a group of order 8 must have an element of order 2. (b) Prove that a group of order 63 must have an element of order 3. Question 2. (a) Suppose : Z20 Z20 is an automorphism and (5) = 5. What are the possibilities for (x) (explain your answer)?

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\fData Exploration and Multiple Linear Regression (MLR) using R1 The\t\"Boston\tHousing"\tdata\tset,\tpart\tof\tthe\tMASS\tpackage,\trecords\tproperties\tof\t506\thousing\tzones\tin the\tGreater\tBoston\tarea.\tFor\ta\tdescription\tof\tthe\tdata\t(housing\tdata\tand\tattribute\tinformation),\tvisit https://archive.ics.uci.edu/ml/datasets/Housing.

Cake Mix Data for Course Assignments Cake Mix Mix #1 Mix #2 Mix #3 Mix #4 Mix #5 Mix #6 Mix #7 Mix #8 Mix #9 Mix #10 Mix #11 Mix 12 Mix #13 Mix #14 Mix #15 Mix #16 Mix #17 Mix #18 Mix #19 Mix #20 Mix #21 Mix #22 Mix #23 Mix #24 Mix #25 Mix #26 Mix #27 Mix #28 Mix #29 Mix #30 Packaging* Calories 1 120 2 120 2 110 2 110 1 100 1 120 1 130 2 120 1 110

Assume the weights of men are normally distributed with a mean of 172 lb and a standard deviation of 30 lb. (a) Find the 80th percentile for the distribution of mens weights. (b) What is the probability that a randomly selected man is greater than 185 lb?

Observation Salary ($) Position Experience 1 53938 Inside Medium 2 52694 Inside Medium 3 70515 Outside Low 4 52031 Inside Medium 5 62283 Outside Low 6 57718 Inside Low 7 79081 Outside High 8 48621 Inside Low 9 72835 Outside High 10 54768 Inside Medium 11 52282 Inside Medium 12 55632 Inside Low 13 63856 Outside Low 14 51827 Inside Medium 15 51948

uiz 6 To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below. Treatment Observation A 20 30 25 33 B 22 26 20 28 C 40 30 28 22 Refer to Exhibit 10-11. The mean square within treatments (MSE) equals

An article in the Wall Street Journal (14 Aug 2008) discussed a medical study carried out by the Boston Scientific Corp. (BSC) on a new heart stent called the Liberte that BSC wanted to introduce in the U.S. market. In the study, the company tested the Liberte on a random sample of 871 heart patients, 70 of whom suffered re-clogging in their

Hi, I need help with my statistics assignment. I don't understand anything! This data set provides the body mass index (BMI) and self-rated physical health scores (PCS-12) for 23 adult (18 years of age) study participants in three groups: Mennonite farmers (MENNONITE), Non-Mennonite farmers (NON-MENNONITE), and urban residents (URBAN). PCS-12

Practice Problems of Chapter 9, 10 and 11 1. A number of fetal stem cells may cross the placenta from the fetus to the mother during pregnancy and remain in the mother's tissue for decades. A recent study shows that the presence of fetal cells in the mother may offer some protection against the onset of breast cancer. Of the 54 women in the study

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3.32 Arachnophobia: A 2005 Gallup Poll found that 7% of teenagers (ages 13 to 17) suffer from arachnophobia and are extremely afraid of spiders. At a summer camp there are 10 teenagers sleeping in each tent. Assume that these 10 teenagers are independent of each other. (a) Calculate the probability that at least one of them suffers from

4. Roger Hall, who oversees six Ford dealerships, believes that the colors chosen by customers who special-order their cars best reflect most customers true color preferences. For that reason, he has tabulated the color requests specified in a sample of 56 Mustang coupe special orders placed this year. The sample data are listed below. Black Red

This worksheet contains values required for MegaStat charts. Boxplot 12/5/2012 16:43.50 2 1559681 2 2093854 3 2093854 3 2359023 1 2359023 3 2359023 3 3039261 2 3039261 2 3565718 2 3039261 1 3039261 1 2093854 2 2093854 1 742364.5 3 742364.5 1 675744.9 3 675744.9 1 4457370 3 4457370 1 5875479 3 5875479 Dotplot 12/5/2012 16:44.17 1559681 1 1603596 1

The following table provides a probability distribution for the random variable x . Compute E ( x ), the expected value of x . Compute 2 , the variance of x (to 1 decimal). Compute, the standard deviation of x (to 2 decimals).

R'(x)=4x(x^2+25,000)(-2/3^) a. the total reveune function R(x)=___, given that the revenue from 130 gadgets is $48,396. (round to nearest integer as needed.) b____gadgets must be sold to generate a revenue of at least $40,000 (type whold number.)

Week 2 Practice Worksheet PSY/315 Version 6 University of Phoenix Material Week 2 Practice Problems Worksheet Prepare a written response to the following questions. Chapter 3 1. For the following scores, find the mean, median, and the mode. Which would be the most appropriate measure for this data set? 2, 2, 0, 5,1, 4,1, 3, 0, 0, 1, 4, 4, 0,1, 4,

Prompt Operations management professionals are often relied upon to make decisions regarding operational processes. Those who utilize a data-driven, structured approach have a clear advantage over those offering decisions based solely on intuition. You will be provided with a scenario often encountered by an operations manager. Your task is to

You are preparing some sweet potato pie for your annual Thanksgiving feast. The store sells sweet potatoes in packages of 6. From priorexperience you have found that the package will contain 0 spoiled sweet potatoes about 55% of the time, 1 spoiled sweet potato 25% of the time and 2spoiledsweetpotatoesthe rest of the time. Conduct a simulation to

A market researcher wanted to study the television viewing habits of a particular small city. A sample of 40 adult residents was asked to record their television viewing in one week. It was found that 27 respondents watched the evening news every weeknight.The researcher wants to test at the 5% level of significance whether the data indicate that

STAT 200: Introduction to Statistics Final Examination, Spring 2016 OL1/US1 Page 1 of 7 STAT 200 OL1/US1 Sections Final Exam Spring 2016 The final exam will be posted at 12:01 am on March 4, and it is due at 11:59 pm on March 6, 2016. Eastern Time is our reference time. This is an open-book exam. You may refer to your text and other course

Give the variance of the following distribution? X 0 1 2 3 4 P(X) 0.20 0.35 0.10 0.25 0.10

researcher has studied subjects' ability to learn to translate words into Morse code. He has experimented with two treatment conditions: in one condition, the subjects are given massed practice; they spend 8 full hours on the task. In the other condition, subjects are given distributed practice; they also spend 8 hours, but their practice is

The management of Madeira Manufacturing Company is considering the introduction of a wearable electronic device with the functionality of a laptop computer and phone. The fixed cost to launch this new product is $300,000. The variable cost for the product is expected to be between $160 and $240, with a most likely value of $200 per unit. The

Suppose that the weight (in pounds) of an airplane is a linear function of the total amount of fuel (in gallons) in its tank. When graphed, the function gives a line with a slope of 6.4. With 50 gallons of fuel in its tank, the airplane has a weight of 2220 pounds. What is the weight of the plane with 84 gallons of fuel in its tank? Pounds:

If the absolute value of your correlation coefficient is 1, your error in prediction will be: a: very high b: 1 c: 0 d: unkown

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A study is planned to compare the proportion of men who dislike anchovies with the proportion of women who dislike anchovies. The study seeks to determine if the proportions of men and women who dislike anchovies are different. A sample of 41 men was taken and the p^estimate for the true proportion of men who dislike anchovies was determined to be

This is an example only. You will need to expand on each section. This example should only be used as a guide and for correct format. Refer to the end of each chapter in your textbooks and the Dissertation Handbook on how to write up the findings section. Remember to put the information in your own words in order to avoid plagiarism. GROUP #

What proportion of the diabetics is obese? ( Please show how you calculated the answer) Underweight Normal weight Overweight Obese Total Diabetes 8 34 65 43 150 No Diabetes 12 85 93 40 230 Total 20 119 158 83 380

Discussion 3.1 Please answer both of the following question parts a & b. 1) Given: p: Pharaohs were buried in the pyramids q: The pyramids are in Alexandria, Egypt. r: The pyramids are 4575 years old. Translate each of the following into symbols: a) If pyramids are in Alexandria, Egypt then it is not the case that either the pyramids are 4575

1.How many independent variables are in 4 x 6 factorial design? How many conditions (cells) are in the design? 2.What is the difference between a cell (condition) mean and the means used to interpret a main effect? 3. What is the difference between a complete factorial design and an incomplete factorial design? 4.Explain the difference between a

What is the formula to find the slope of a tangent line?

An insurance company would like to estimate the average amount claimed by its policyholders over the past year. A random sample of 300 policyholders was chosen, whose observed sample mean was $739.98 and whose sample standard deviation was $312.70. The company's primary concern is to avoid underestimating the average amount claimed by its

Selling Prices of Houses and other Characteristics Size (in Selling Price (in Square Number of Number of Garage Thousands of $) Feet) Bedrooms Baths Dummy 209.3 2100 5 1.5 0 345.3 2600 8 2 1 221.1 2300 3 1.5 0 266.6 2400 4 2 1 292.4 2100 4 2 1 209 1700 2 1.5 1 270.8 2500 6 2 1 246.1 2100 4 2 1 194.4 2300 2 2 0 281.3 2100 3 2 1 172.7 2200 4 2 0

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You are a marketing manager for a company that makes ready-to-eat breakfast cereals. Your company recently initiated a loyalty program for consumers, which resulted in a large purchaser database. The brand managers are eager to mine the available data, which they can use to design more effective promotional programs. Your first step is to conduct

In the Physicians Health Study over 22,000 male physicians were randomly assigned to two groups. One group took an ordinary aspirin tablet every other day while the other group took a placebo. The study was double-blinded. After a number of years, the number of heart attacks was recorded for each of the subjects. For the aspirin group the number

IJUST NEED THE ANSWERS ASAP Suppose that x is normally distributed with a mean of 30 and a standard deviation of 3. What is P(27.42 x 34.08)? a) 0.718 b) 0.413 c) 0.309 d) 0.305 e) 0.415 f) None of the above Question 2 Find a value of c so that P(Z c) = 0.48. a) 0.95 b) -0.05 c) 0.15 d) 0.05 e) 0.10 f) None of the above Question 3 Suppose that x

In baseball, is there a linear correlation between batting average and home run percentage? Let x represent the batting average of a professional baseball player. Let y represent the home run percentage (number of home runs per 100 times at bat). Suppose a random sample of baseball players gave the following information. x y 0.251 0.259 1.3 3.7

In a popular day care center, the probability that a child will play with the computer is 0.45; the probability that he or she will play dress-up is 0.27; play with blocks, 0.18; and paint, 01. Construct the probability distribution for this discrete random variable.

Review the following research questions. Is the use of soap and water or alcohol-based rubs more effective in preventing nosocomial infections? How effective are anti-depressive medications on anxiety and depression? For patients of 70 years and older, how effective is the use of the influenza vaccine at preventing flu as compared to patients who

The time required for a citizen to complete a 2000 U.S. Census long form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. Use the C-2 table below to find the probability that a randomly selected citizen will need more than 60 minutes to complete a long form.

It is known that among UCLA students 60% support candidateA for the student council, while only 40% support candidate B. In order notto waste the time of too many students, it was decided that instead of holdinggeneral elections, n students will be selected at random and the outcome of theelections will be based on the majority vote among them

. A personnel psychologist has to decide which of three employees to place in a particular job that requires a high level of coordination. All three employees have taken tests of coordination, but each took a different test. Employee A scored 15 on a test with a mean of 10 and a standard deviation of 2; Employee B scored 350 on a test with a mean

The loudness, L, in decibels (dB), is given by the formula L = 10 * log l/l 0 , where l 0 = 10 -12 W/m 2 . The intensity, l, of a sound is 5.2 x 10 -6 W/m 2 . How loud in decibels is the sound level? The loudness is approximately ________________ dB. (Round to the nearest whole number as needed.)

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uiz 7. Name: Five questions, four points each, twenty points total. Please show your work! #1. Sketch a nice graph by applying transformations to the five amigos of the basic function: f(x) = 4 - log2(4 - x) #2. Combine into a single logarithm: log3x - 2 log3y + log9z #3. Solve for x, expressing your result in exact form (not some crummy decimal):

A sample of 50 TV viewers were asked, "Should TV sponsors pull their sponsorship from programs that draw numerous viewer complaints?" Below are the results of the survey. (Y = Yes; N = No; W = Without Opinion) N W N N Y N N N Y N N Y N N N N N Y N N Y N Y W N Y W W N Y W W N W Y W N W Y W N Y N Y N W Y Y N Y a. Construct a frequency distribution

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Here is the problem: The variableFoulsin the datasetNBAPlayers2011shows the total number of fouls during the 2010-2011 season for all players in the NBA (National Basketball Association) who played at leastminutes per game that season. We use this group as a sample of all NBA players in all seasons who play regularly. Use this information to test

uiz 7 The table below gives beverage preferences for random samples of teens and adults. Teens Adults Total Coffee 50 200 250 Tea 100 150 250 Soft Drink 200 200 400 Other 50 50 100 400 600 1,000 We are asked to test for independence between age (i.e., adult and teen) and drink preferences. Refer to Exhibit 11-8. The expected number of adults who

A variable X follows a normal distribution with standard deviation 8.63. We take a random sample of 37 individuals from the population and calculate a confidence interval forto be (54.086, 59.914). What is the confidence level of this confidence interval? Show your calculations.

Modern Algebra 1, MATH 5410 Homework 6, Section I.8, Solutions Due Friday, October 23 at 1:40 Write in complete sentences!!! Explain what you are doing and convince me that you understand what you are doing and why. Justify all steps by quoting relevant results from the textbook or hypotheses. I.8.5. Let G and H be nite cyclic groups. Then G H is

In order to find a 93% confidence interval we need to find values a and b such that for ZN(=0,=1),P(a

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A machine that manufactures automobile partsproduces defective parts 15%of the time.If 6parts produced by this machine are randomly selected,what is the probabilitythat fewer than 2of the parts are defective?

The workers' union at a particular university is quite strong. About 94% of all workers employed by the university belong to the workers' union. Recently, the workers went on strike, and now a local TV station plans to interview 4workers (chosen at random) at the university to get their opinions on the strike. What is the probability that exactly

can you come up with a short, simple and basic response to this discussion post? Chi -square tests are great to show if distributions differ or if two variables interact in producing outcomes. What are some examples of variables that you might want to check using the chi -square tests? What would these results tell you? One value that I would like

1. Describe the error in the conclusion. Given: There is a linear correlation between the number of cigarettes smoked and the pulse rate. As the number of cigarettes increases the pulse rate increases. Conclusion: Cigarettes cause the pulse rate to increase. 2. Now that you are familiar with the basic concepts of statistics, what are some examples

8. Suppose that and are independent events such that and . Find and . P (A B )= P (A B )= 1 0 . I t is estimated that, during the past year, % of all adults visited a therapist and % of all adults used nonprescription antidepressants. It is also estimated that % of all adults both visited a therapist and used a nonprescription antidepressant

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