S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. february 2023
  6. 25

Mathematics Questions and Answers February 25, 2023

Expert-verified solutions to help you succeed

use the pythagorean theorem to find the lengths of the sides of the triangles. x+4=(long leg),x=(short leg) 20=hypotenuse

If you conducted a study where you could account for 49% of the variability for one variable with another variable, which of the following correlation coefficients did you find? Why? A. .49 B. .2401 C. .7 D. none of the above

LetAandBbe two events withP(A)=0.4, P(B)=pandP(AB)=0.7 (a) Find the value of p for which A and B are mutually exclusive (b) Find the value of p for which A and B are independent

\f\f\f\f\f\f\f\f\f\f

Second frame same as above, but missing option D. #9. #10

Treating Cost/Mile as the dependent variable, develop an estimated regression with Family-Sedan and Upscale-Sedan as the independent variables. Discuss your findings. Treating Value Score as the dependent variable, develop an estimated regression equation using Cost/Mile, Road-Test Score, Predicted Reliability, Family-Sedan, and Upscale-Sedan as

Question 2: A business man goes to hotels X, Y, Z and 20%, 50% and 30% of the visits respectively. It is known that 5%, 4%, 8% of the rooms in X, Y Z hotels have faulty plumbing. What is the probability that the businessmans rooms having faulty plumbing are assigned to hotel Z.

Among 9 electrical components exactly one is known not to function properly. If 2 components are selected randomly, find the probability that exactly one does not function properly.

\f

A marketing organization wishes to study the effects of four sales methods on weekly sales of a product. The organization employs a randomized block design in which three salesman use each sales method. The results obtained are given in the following table, along with the Excel output of a randomized block ANOVA of these data. Click here for the

11: Let y = 3t + 6 be a linear function representing the distance from home for an ant t minutes after starting out from a location near its home. What does the number 3 represent in this function.? A: The ant is 3 feet from its home after t minutes. B: The ant started out 3 feet from its home. C: The ant is crawling at 3 feet per minute. D: The

Size($) Rent(sq.feet) 850 1950 1450 2600 1085 2200 1232 2500 718 1950 1485 2700 1136 2650 726 1935 700 1875 956 2150 1100 2400 1285 2650 1985 3300 1369 2800 1175 2400 1225 2450 1245 2100 1259 2700 1150 2200 896 2150 1361 2600 1040 2650 755 2200 1000 1800 1200 2750

LEAD 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 AGE 11 9 11 6 11 6 6 15 7 7 13 10 12 12 15 10 15 9 8 11 7 11 6 6 9 13 9 6 13 6 12 8 9 7 12 6 9 14 15 14 9 7 12 8 7 15 6 14 7 13 12 6 7 9 12 15 10 9 13 12

3 A ________ is defined as the probability that the interval estimate will include the population parameter of interest, such as a mean. Answer: Confidence interval margin of error confidence level significance level confidence interval Question 4 A random sample of 35 business students required an average of 50.7 minutes to complete a statistics

how are you ? it free unlock so why not Q.1 Climate disruption is an international topic of discussion. The Kyoto Protocol (1997) is a negotiated agreement between 161 nations to help slow global warming and the resulting climate disruption. By 2009, 194 of the world's nations, though not the United States, ratified the agreement. Do you think it

Team Case Study Legend and Coding: Gender : 0 = Male; 1 = Female Age: Age of customers Income: Personal income in thousands Deposit Before: Amount of deposits before the pilot; in thousands Deposit After: Amount of deposits after the pilot; in thousands Loan Before: Amount of loans before the pilot; in thousands Loan After: Amount of loans after

2: 1. A contractor has found that her cost for a certain construction job is subject to random variation. She believes its actual value follows a continuous uniform distribution between $9000 and $11000 with a mean of $10,000. The cost to prepare her bid is $500. She is competing in a sealed bid competition with four other contractors. She

A random sample of 80 lawyers was taken, and they were asked if they are in favour of or against capital punishment. the following table gives the two-way classification of their responses.

A) It is not possible for country A to have a gini index equal to twice the gini index of country B. Explain why this is true or why it is false. B) A gini index cannot equal a number a with the property that a is positive and 1-a is also a gini index. explain why this is true or false

\f\f

\f

QUESTION 3 (10 MARKS) A company makes electronic gadgets. One out of every 50 gadgets is faulty, but the company doesn't know which ones are faulty until a buyer complains. The company makes a RM3 profit on the sale of any working gadget, but suffers a loss of $80 for every faulty gadget because they have to repair the unit. Let X be the profit,

2. A professor always assigns final grades such that 20% are A, 40% are B, 30% are C, 5% are D, and 5% are F. The grade point scores are 4 for A; 3 for B; 2 for C; 1 for D; and 0 for F. A. Create the probability distribution table for grade points for this professor. B. Find the mean of this probability distribution and provide and interpretation

\f

For a bell-shaped dataset with a large number of values, approximately what z-scorewould correspond to a data value equaling each of the following?(a) The median.(b) The minimum value.(c) The maximum value.(d) The mean

1.Find the distance between the points. Give an exact answer and an approximation to three decimal places. (2,-5) (-8,-2) 2Determine whether the relation is a function.Identify the domain and the range. ((-3,2),(6,2),(3,2),(4,2),(-2,2)) 3.Find the domain of the following function. Do not use a graphing calculator. f(x)equals= 1 over x^2-5x-6

In an article appearing inTodays Healtha writer states that the average number of calories in a serving of popcorn is 75.To determine if the average number of calories in a serving of popcorn is different from 75, a nutritionist selected a random sample of 20 servings of popcorn and computed the sample mean number of calories per serving to be 78

A ______________ test is an inferential procedure used to determine whether a frequency distribution follows a defined distribution. A) F B) goodness-of-fit C) normality D) z E) None of these

According to R.L. Polk& Co., the average age of cars and light trucks in the U.S. in 2011 was 10.8 years. Assume that the standard deviation for this population is 3.7 years. A sample of 35 randomly selected vehicles was selected. What is the probability that the sample mean will be greater than 10years? A. =1-normdist(10,10.8,0.6254,true) B.

23.Suppose a research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. A sample of 100 steady smokers revealed that the sample mean is $20. And we know the population standard deviation is $5. What is the probability that a sample of 100 steady smokers spend between $19 and $21? A) 0.0091 B)

An automobile manufacturing plant produced 29 vehicles today: 11 were sedans, 9 were vans, and 9 were trucks. Plant managers are going to choose two of these vehicles for thorough inspection. The first vehicle will be chosen at random, and then the second vehicle will be chosen at random from the remaining vehicles. What is the probability that

#71 Your company has to choose between four possible projects. Project A (six months) will have an IRR of 6%. Project B (eight months) will have an IRR of 10%. Project C (six months) will have an IRR of 11%. Project D (eight months) will have an IRR of 9%. Which of the projects would you recommend on this information alone? A Project A B Project B

Suppose that X, Y are jointly continuous with joint probability density function f(x, y) = c*e^(- (x^2)/2 - ((x-y)^2)/2) for some constant c . (a) Find the value of the constant c. (b) Find the marginal density function of X and Y . (c) Determine whether X and Y are independent or not.

Part I. Analyze Data Instructions 1. Open the file Passive and Active Smoke using menu option Datasets and then Elementary Stats, 11th Edition. This file contains some information on the continine levels in smokers, nonsmokers exposed to smoke (ETS), and nonsmokers not exposed to smoke (No ETS). How many observations are there in this file? 2.

According to a survey, 62% of murders committed last year were cleared by arrest or exceptional means. Fifty murders committed last year are randomly selected, and the number cleared by arrest or exceptional means is recorded. . (a) Find the probability that exactly 41 of the murders were cleared. (b) Find the probability that between 36 and 38 of

Historically, the proportion of students entering a university who finished in 4 years or less was 63%. To test whether this proportion has decreased, 120 students were examined and 52% had finished in 4 years or less. To determine whether the proportion of students who finish in 4 year or less has statistically significantly decreased (at the 5%

Which of the following patterns of the partial autocorrelation function correlogram is inconsistent with an underlying moving-average data process? a) Exponentially declining to zero b) Cyclically declining to zero. c) Positive at first, then negative and increasing to zero. d) Negative at first, then positive and declining to zero. e) None of the

FIGURE B (Assume that MC are constant at 30)

Instructor: Basu Dipanker Course: MAT-240-Q6622-16EW6 Assignment: 6-2 MyStatLab: Module Six Problem Set 1. Determine whether the scatter diagram indicates that a linear relation may exist between the two variables. If the relation is linear, determine whether it indicates a positive or negative association between the variables. Use this

Do the health benefits of alcohol consumption depend on the type of alcohol and the amount consumed? The Harvard School of Public Health reviewed studies investigating the relation between alcohol consumption and health. One study investigated whether different types of alcoholic beverage lead to different health outcomes. Based on self-report

I need help with rational expressions Instructions:In this discussion, you are assigned two rational expressions to work on. Remember to factor all polynomials completely. Explain in your own words what the meaning of domain is. Also, explain why a denominator cannot be zero. Find the domain for each of your two rational expressions. Write the

The National Survey of Student Engagement conducts surveys to study various aspects of undergraduate education. In a recent survey, students were asked if they needed to explain the meaning of numerical or statistical data in a written assignment. Among the first-year students, 9,697 responded positively while 13,514 seniors responded positively.

on level ground a yardstick and a building cast shadows of 5ft and 125 ft, respectively. WHat is the building's height? Geometry

Consider a t distributionwith 24degrees of freedom. Compute p( -1.07 < t < 1.07). Round your answer to at least three decimal places. Considera t distributionwith24degreesoffreedom.Findthevalueofcsuchthatp(t < c)=0.05.Roundyouranswertoatleastthreedecimalplaces. p(-1.07

TR 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 SALES 88 80 96 76 80 73 58 116 104 99 64 126 94 71 111 109 100 TV 100 99 101 93 95 95 80 116 106 105 90 113 96 98 109 102 100 RADIO 95 99 103 95 102 94 89 112 110 87 90 101 100 85 99 101 93 NEWS 87 98 101 91 88 84 74 102 105 97 88 108 89 78 109 108 102 2 3 4 1 2 3 4 1 127 99 82 67 100 78 115 83 107 108 95 91

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

A tray of electronic components contains19components,5of which are defective. If 4 components are selected, what is the possibility of each of the following? (Round your answers to five decimal places.) (a) that all 4 are defective (b) that 3 are defective and 1 is good (c) that exactly 2 are defective (d) that none are defective

An urn contains 5 balls numbered 1 to 5 of which the first three are black and the last two are gold. A sample of size 2 is drawn with replacement. Let B1 denote the event that the first ball drawn is black and B2 denote the event that the second ball drawn is black. I) Describe and tabulate the sample space and exhibit the event B1, B2 and B1B2.

The distribution of the number of days a patient stays in the hospital after successful laparoscopic gallbladder surgery is as follows: 44% stay just 1 day; 50% stay 2 days; and 6% stay 3 days. Set up the calculation to find the expected number of days a patient will stay in the hospital after laparoscopic gallbladder surgery. Show your work.State

1) A fair coin is tossed three times, and the random variable X is the number of heads in the first two tosses and the random variable Y is the number of heads in the last two tosses.1.What is the joint and marginal probability mass function of X and Y?2.What is the probability that both X and Y have the same number of tails?3.What is the

Heights were measured for a random sample of plants grown while being treated with a particular nutrient. The sample mean and sample standard deviation of those height measurements were centimeters and centimeters, respectively. Assume that the population of heights of treated plants is normally distributed with mean . Based on the sample, can it

Health Care Research & Statistics Differentiating Experimental & Observational Designs Instructions: For each abstract, indicate whether the study is observational or experimental, and then indicate the population being studied and the dependent and independent variables. 1. Background: A national study of radiologic technologists' radiation

For questions 12-15: We want to compare the cost of three and four bedroom home. The following information is an output R comparing the mean list price of a four bedroom house to the mean list price of a three bedroom home.``` #### Welch Two Sample t-test #### data: bed4 and bed3 ## t = 1.5526, df = 27.094, p-value = 0.132 1 ## alternative

Scenario: The owner of a large bicycle sales and repair business stocks a popular brand of mountain bikes. Based on historical data, the estimated annual demand for the bikes is 1375 units. The estimated average demand per day is 11 units. The purchase cost from the distributor is $765.00 per unit. The lead-time for a new order is 7 days. The

amal agwan #a#m#a#l# #a#g#w#a#n# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

At a factory that produces pistons for cars, Machine 1 produced 711satisfactory pistons and 79 unsatisfactory pistons today. Machine 2 produced 630 satisfactory pistons and 270 unsatisfactory pistons today. Suppose that one piston from Machine 1 and one piston from Machine 2 are chosen at random from today's batch. What is the probability that the

1. Describe what optimization and linear programming are in 3-4 sentences; describe an application of it in your job, a hypothetical or real one, in 3-4 sentences. 2. Describe how uncertainty is modeled mathematically in statistics in 6-8 sentences. 3. Describe what hypothesis testing is in 3-4 sentences; describe an application of it in your job,

Statistics Aysha Ross Lab Chapter 7 and 8 (Confidence Intervals are from Chapter 6 but are incorporated here) Write the null and alternative in terms of the appropriate parameter (ex. H0: =10). Clearly identify all pieces requested. Based on what is asked you will need to decide if you are using a one sample or two sample test about the mean large

Give the null and alternative hypotheses to determine if the mean SSATL score of Japanese managers differs from the mean SSATL score of American managers. Are Japanese managers more motivated than American managers? A randomly selected group of each were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation

Y2K Inc. has estimated that half of their twenty workers will be injured in the coming year. The expected severity per occurrence is $1,000. What is the expected loss per exposure?

An exhaustive study of all active Facebook accounts was recently conducted by Facebook. One variable Facebook recorded was the number of friendsXof each Facebook user. SupposeXhas expected value E(X) =199and standard deviation SD(X) =295.9. Since the possible values ofXare only integers and since the distribution ofXis highly skewed to the right,

Simple! (This is 1 of 5 parts.) In a study evaluating "Why minority males graduate American high-schools at lower rates than their counterparts", the following is needed: 1)Envisioned Quantitative Design 2) Possible Strengths or Weaknesses of the design 3) Justify why design is chosen and any alternatives 4) Describe the type of data that will be

The probability that an American CEO can transact business in a foreign language is .20. Ten American CEOs are chosen at random. What is the probability that none can transact business in a foreign language? (Round your answer to 4 decimal places.) That at least two can? (Round your answer to 4 decimal places.) That all 10 can?

Hi, need help with statistics quiz. Please see attached. Thanks!

A box of colored crayons contains 15 distinct colors. In how many ways can 13 colors be chosen, assuming that the order of the colors chosen doesn't matter?

\f

\f

A set of scores ranges from a high of X = 96 to a low of X = 27. If these scores are placed in a grouped frequency distribution table with an interval width of 10 points, the top interval in the table would be ________. # 90-99 90-100 91-100 87-96 # After 5 points are added to every score in a distribution, the mean is calculated and found to be =

At a local college, 284of the male students are smokers and 426are non-smokers. Of the female students,120are smokers and 480are non-smokers. A male student and a female student from the college are randomly selected for a survey. What is the probability that both are non-smokers? Do not round your answer.

Please help me out! Urgent! Thanks Demographicexpertssaythatthepopulation, P ,ofChina,inbillions,canbeapproximatedbythefunction P = 1.15 ( 1.014 ) t ,where t isthenumberofyearssincethestartof1993.Usingthis model,estimatehowmuchfastertheChinesepopulationwillbe growingin2017thanin2000.(Besuretouseenoughdecimalplaces(6ormore)inyour calculations.) a)

The max grade for this lab is 110 but the scale is still 100 points. The 10 points are extra credit. The following video might be helpful: Histograms 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 In what follows, use any of the following tests/procedures: Regression, multiple regression, confidence intervals, onesided t-test or two-sided t-test. All the

Let x denote the weight in pounds of a bad of feed, where X~N(101, 4). What is the probability that 20 bags will weight at least a ton?

Tear Viscosity Pressure Plate Gap 0.00 350.00 180.00 0.00 0.00 350.00 170.00 0.00 0.45 319.00 186.00 1.80 0.85 380.00 174.00 1.80 0.35 350.00 180.00 0.00 0.30 300.00 180.00 0.00 0.70 400.00 180.00 0.00 1.90 350.00 190.00 0.00 0.25 350.00 180.00 0.00 0.10 319.00 186.00 -1.80 0.15 380.00 186.00 -1.80 3.90 350.00 180.00 3.00 0.00 380.00 174.00 -1.80

In a sample of 98 people who have had strokes, the average cholesterol level was 250 with a standard deviation of 43. In order to test the hypothesis (at the 5% level of significance) that the average cholesterol level of people who have had strokes was at least 240, what is the test statistic? (please round your answer to 2 decimal places)

\f

1.) For Each of the 2 majors create a pie chart using the column 'School Type'. COMMENT ON YOUR RESULTS. 2.) For each of the 2 majors create a frequency DISTRIBUTION and HISTOGRAM using the column 'Annual % ROI'. Group with starting at 6% (0.06), ending at 11% (0.11), and go by 0.5% (0.005). 3.) FOR THE HISTOGRAMS TITLE YOUR CHARTS " HISTOGRAM

Flip a coin 100 times, keeping track of how many head and tails you get. Give your results and commenton what would happen if you continued to do it 1000 times, 10,000.

The last 10 questions Mean of Sampling Distribution of "Xbar1 - Xbar2" (Mean of all the sample differences) is equal to "Population Mean 1 - Population Mean 2" True False

Suppose a card is drawn from a deck of 52 playing cards. What is the probability of drawing a 7 or a king?

1This is a question I am working on and I come up with different answers. This is one of the examples answers from courehero I wanted to check my work. First isn't the math done wrong on the section where is says 52-43^=25 if I am corrects it should be 52-43^2=81 Second I come up with a total different number for my answer and Idk what I am doing

Three assembly lines are used to produce a certain component for an airline. To examine the production rate, a random sample of six hourly periods is chosen for each assembly line and the number of components produced during these periods for each line is recorded. The output from a statistical software package is:

3. An insurance company specializes in insuring pets, but the insurance company has not yet decide how much it will charge its customers- let say M dollars. It has decided though that if an insurers pet is lost, the company will pay the insurer $10 000 for compensation and the company expects on average to earn $50 on each policy. Suppose the

\f

1.The table below shows the results of an experiment that relates the height at which a ball is dropped,x, to the height of its first bounce,y. Drop Height (x) (cm) Bounce Height(y) (cm) 100 26 90 23 80 21 70 18 60 16 Find, the mean of the drop heights.Find, the mean of the bounce heights.Find the linear regression equation that best fits the

Can anyone download a document for me in exchange for $5 of tutor credits?

12 ducks fly overhead. Each of 6 hunters picks one duck atrandom to aim at and kills it with probability 0.6. What is the expected number of hunters who hit the duck they aim at?

1. Using the data in Chapter 12, problem 12.11, page 488, do a correlation and regression analysis. 1a. Identify the dependent and independent variables if the data to be used to develop the equation of a regression line to predict the average size of the farm by the number of the farms. Setup and interpret a scatter diagram for this data. Make

The heights of kindergarten children are approximately normally distributed with the following. (Give your answers correct to four decimal places.)=36and=3.8inches (a) If an individual kindergarten child is selected at random, what is the probability that he or she has a height between 34.3 and 37.7 inches?

1. Finish times (to the nearest hour) for 60 dogsled teams are shown below. Use five classes. Categorize the basic distribution shape as uniform, mound-shaped symmetric, bimodal, skewed left, or skewed right. The relative frequency histogram of the above data is given below. A) B) C) D) E) mound-shaped symmetric Skewed right Bimodal Uniform or

The following table lists the probability distribution of a discrete random variablex: x 2 3 4 5 6 7 8 P(x) 0.15 0.34 0.23 0.13 0.07 0.06 0.02 The mean of the random variablexis:. The standard deviation of the random variablex, rounded to three decimal places, is:.

Create a frequency table using the family pet data that is provided below. Using Microsoft Word to create the table. You will need to collect the data for this variable . Identify each data type, and then decide on the appropriate number of classes and appropriate class width. Justify your reasoning in a brief paragraph. Paragraph must be written

Below is an accident summary adapted from CSB website: On the night of October 23, 2009, a large explosion occurred at the Caribbean Petroleum Corporation (CAPECO) facility in Bayamn, Puerto Rico, during offloading of gasoline from a tanker ship, the Cape Bruny, to the CAPECO tank farm onshore. A 5-million gallon aboveground storage tank (AST)

A component lifetimes are exponentially distributed with mean 8 hours. (1) the probability that a given component survives 16 hours; (2) the median of component lifetimes; (3) the standard deviation of component lifetimes; (4) the probability that the average lifetime of 100 independent components exceeds 7.5 hours; (5) the probability that a

Calculate the 95% confidence interval for the difference between the mean Anger-In score for the athletes and non-athletes. What can you conclude

1. Given the following information, what is the base selling price of the menu item using the prime costs pricing method? Menu Item Food Cost $3.40 Annual Labor Cost $200,000 Annual Number of Expected Guests 60,000 Desired Prime Costs Percentage 63% 2.The food cost of a menu item is $3.85 and its labor cost per guest is $2.95. If the desired prime

A bucket that weighs 4 pounds and a rope of negligible weight are used to draw water from a well that is 82 feet deep. The bucket is filled with 41 pounds of water and is pulled up at a rate of 2.6 feet per second, but water leaks out of a hole in the bucket at a rate of 0.3 pounds per second. Find the work done pulling the bucket to the top of

What is the solution to this question? please provide explanation and steps 1). An exam question asked for the probability that a Bin(5, p) random variable is equal to 3, with a certain given p. A confused student found instead the probability that a Geom(p) random variable is equal to 3. Miraculously, the student got the correct result. What can

2.Given that XN(3,4),find: (1)P(3X < 7),(2)P( 1 2X < 2) (3)P(3 X < 2)

\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f1 ( ) = 12 : 2 : lim 1 = 3 3 ( ) (, ) (4) = 0 , (4) < 0 : 4 , (4) 4 ( )>0 ( ) <0 \f

A purchasing agent has placed rush orders for a particular raw material with two different suppliers, A and B. If neither order arrives in four days, the production process must be shut down until at least one of the orders arrives. The probability that supplier A can deliver the material in four days is .55. The probability that supplier B can

Showing 700 - 800 of 1497
  • 8 / 15