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Mathematics Questions and Answers March 04, 2023

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\"Assignment #3\" Solve the following questions on Forecasting. (Show your calculations for all answers) 1. The following is the number of customers who checked in at Hotel A in the past 6 weeks: Week of Customers checked-in August 31 360 September 7 446 September 14 386 September 21 415 September 28 275 October 5 584 a) Forecast the demand for

Stat 95 SPSS Assignment: Comparing Two Means using the Independent-samples t test 1. This exercise is taken from the textbook exercises in your syllabus, exercise 7.45. Z tests are often used when a researcher wants to compare his or her sample to known population norms. The Graded Naming Test (GNT) asks respondents to name objects in a set of 30

The probability that a randomly selected 1-year-old male chipmunk will live to be 2 years old is 0.86139. (a) What is the probability that two randomly selected 1-year-old male chipmunks will live to be 2 years old? (b) What is the probability that eight randomly selected 1-year-old male chipmunks will live to be 2 years old?

Two dice are tossed. The probability that the total score is a prime number is:

Identify the sample space of the probability experiment: answering a true or false question

To prepare for this Part 1 of your Assignment: Review this weeks Learning Resources and media program related to multiple regression. Using the SPSS software, open the Afrobarometer dataset or the High School Longitudinal Study dataset (whichever you choose) found in the Learning Resources for this week. Based on the dataset you chose, construct a

1. Find a general solution to the following ordinary differential equation: !! + 4 = 32 2. find the eigenvalues and eigenvectors of the following matrix A: 1 2 3 A= 0 5 6 0 0 7 Ans : 1 y ' ' + 4 y=3 sin 2 x auxiliary equation m2+4=0= m=2i ,2i y=C 1 cos 2 x +C2 sin 2 x particular solution y= 1 3 sin 2 x D +4 2 3x 1 sin 2 x 2D 3x cos 2 x . 4 Hence

Question 6 Ross Times, the student newspaper of Ross College, printed a "What do you think?" column feature discussing the parking situation on campus. To gather student opinion on parking, an editor for the paper stood at the entrance to the student union and gathered responses from students as they left. In all, 126 responses were collected.

Let {Xn : n 1} be a sequence of independent Poisson random variables with EXn = n. Let Sn = X1++Xn. Show that if n = , then Sn/ESn 1 a.s.

1 Not yet answered Marked out of 1.00 A small electronics store has begun to advertise in the local newspaper. Before advertising, the long-term average weekly sales were $9,820. A random sample of 50 weeks while the newspaper ads were running gave a sample mean weekly sales of $10,960. Does this indicate that the population mean weekly sales is

The model fit is determined by the ANOVA table results (F statistic = 37.226, 1,376 degrees of freedom, and the p value is .001). Based on these results, does the model fit the data? Briefly explain. (Hint: A significant finding indicates good model fit.) Based on the coefficients, what is the value of the y-intercept (point at which the line of

The regression line for the given data is yhat= 2.097x-0.552. Determine the residual of a data point for which x=-1 and y=-2. please show work, the answers is 0.649. I just need to know how its done.

The total area to the left of zequals=negative 1.781.78 and to the right of zequals=1.781.78 under the standard normal curve is

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Suppose that a certain college class contains 60students. Of these,are 37 freshmen, 28are economics majors, and 10are neither. A student is selected at random from the class. (a) What is theprobabilitythat the student is both a freshman and an economics major? (b) Given that the student selected is a freshman, what is the probability that he is

The average return for 500 of the largest U.S. companies in the Standard and Poor's 500 index (S&P500) last year was 11.4%. Can we say with 95% confidence that the average return for all stocks last year in this particular category differed from the S&P500 last year? Why or why not?

I'm trying to check my answers for psy 1110 at ohio with mccarthy on modules 9 & 10. I only see test questions and no answers.

Lodging Cost. A travel association claims that the mean daily lodging cost for two adults traveling together on vacation in San Francisco is at least $240. A random sample of 24 such groups of adults has a mean daily lodging cost of $233 and a standard deviation of $12.50. Is there enough evidence to reject the claim at alpha = 0.10? Notice that

A random sample of size 36 is taken from a population with a mean of 50 and standard deviation of 5. What is o~ Xbar (sorry couldn't post the symbols)

Complete the statement below. A Type II Error is made... Choose the correct answer below. A. A Type II Error is made when there's evidence to reject the null hypothesis, but the null hypothesis is true. B. A Type II Error is made anytime we do not reject the null hypothesis. C. A Type II Error is made when there's not enough evidence to reject the

mme-nu-"-I an). ' CMMWCQ)I' 7. Choose the range of f(x) = 2-(2 + 7. ('"3 A. [7, oo)

uiz: Module 3 Problem Set Quiz: Module 3 Problem Set Quiz: Module 3 Problem Set Quiz: Module 3 Problem Set Quiz: Module 3 Problem Set Assume that the own-price elasticity of demand is -2 for a certain firm's product. If the firm raises price, the firm's managers can expect total revenue to: decrease increase remain the same either increase or

Stat 305 (Fall 2016): Homework 2 Due Date: Thursday, September 8, in class Write legibly and show all your work. Please staple your assignment if you use more than one sheet. 1. The accompanying data are three hypothetical samples of size 10 that are supposed to represent measured manganese contents in specimens of 1045 steel (the units are

Your statistics teacher, knowing the power of sampling, decides to use only 3 of your 5 quiz grades in assigning your grade for the course, chosen at random. Your quiz average using all 5 quizzes is 81.6, with a standard deviation of 11.84. What is the probability that your sampled quiz average will be less than 80? What is the probability that

Describe the experimental design you would choose for the following situation. Make sure to identify the response, experimental units, whole plots, whole plot factors, split plot factors, nested factors, random factors, fixed factors, etc. (when applicable). Also, carefully write down the model and describe fully the terms in the model

Consider the hypotheses shown below. Given that x=43, = 1 1 , n = 3 3 , = 0.01 , complete parts a and b. H0: 41 H 1 : > 41 a. What conclusion should be drawn? b. Determine the p-value for this test. a. The z-test statistic is _____. (Round to two decimal places as needed.) The critical z-score(s) is(are) ______. (Round to two decimal places as

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MB 3200 Homework #4 ****************************************************************************** Instructions: Solve all the problems. Each problem carries 10 points. Maximum score possible for this Homework is 80 points. Additional Suggestions/Instructions: 1) No need for typing. You can do your work by hand on paper. 2) If you use a regular

Due by 11.59 pm August 10th Chapter 12 Simple Regression Assignment Please provide detailed solutions to the following problems/exercises (4 problems/exercises x 8 points each): 1) Problem 12.2 (page 494 in the text) 2) Problem 12.20 (page 505 in the text) 3) Problem 12.24 (page 511 in the text) 4) Problem 12.30 (page 515 in the text) 1 Telephone

UIZ # 2 Problems 1. The area enclosed between y=x 2 +2 and y=3 is revolved about the horizontal line y=3 to form a solid. Calculate the volume. (Hint: Disks) 2. Let R be the region between the graphs of f (x) and g(x) on the given interval. Find the volume V of the solid obtained by revolving R about the x- axis, where and [0, 4]. Hint: Solids

Math 31 1. Quiz Determine whether the following series converge or diverge: i) 1 n n 1 2. April 26, 2015 ii) n 3 n 1 2 1 n Determine if the following series converge or diverge. If it converges, determine whether it converges absolutely or conditionally. i) 1 n 1 n 1 n n ii) 1 n 1 n n 2n 3n 2 1 n

Fifty percent of all technical assistants would like to have a PC. Eighty percent of all technical assistants would like to have MAC. Fourty-five percent of all technical assistants would like to have both. If a technical assistant is randomly selected, what is the probability that she would like to have MAC, given that she would like to have a PC

There are two main approaches to case studies. What are the main differences between KKV and Gerring (and the other follow-up studies we read)? What are the main lessons you can take from this to apply to your own research?

Subtract the following polynomials. Show work. (the 3 is up & to right of the x) (the 2 is up & to right of x) (the 2 & 3 are up & to right of both x's) (3x3 - 4x2 + 7) - (7 - 4x2 + 3x3) =

Use the table below to answer the following question(s). Sheila joined Simsin Tradings at the age of 36 with a starting salary of $75,000. She expects a salary increase of 5 percent every year. Her retirement plan requires her to pay 9 percent of her salary, while the company matches it at 32 percent. She expects an annual return of 7 percent on

I need help with this scenario. Questions to response to this case: indicate what would be the relevant population and the most appropriate sampling design. Be sure to give the reasons for your answers. Scenario: A consultant had administered a questionnaire to some 285 employees using a simple random sampling procedure. As she looked at the

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A marketing analyst randomly surveyed 150 adults from a certain city and asked which type of tooth paste they were currently usingExtra Whitening or Regular (all chose one of these two types). From the results of this survey, the analyst obtained the following 95% confidence interval for the proportion of all adults in the city who are using Extra

supposed that a coin is thrown once find the probability that a tail appears

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in november 2008.HBO released the complete series of the sopranos on DVD. according to an ad in the new york times, there were 86 episodes on 33 discs. if 5 discs were soundtracks and bonus material and 6 discs each had 4 episodes , how many discs had 2 episodes and how many had 3. FYI: is a question from mathematics with application in the

Given the linear equation 2ax+3by = 7c, where a,b,c > 0, if x decreases by 10 units, what is the corresponding change in y?

This problem uses data from bulbs.com, which sells dif t types of light bulbs on their website only. Since it does not have physical stores, all purchases can be recorded and linked to the reviews that were shown at the time of ordering. We restrict our attention in this study to the six largest brands (Bulbrite, Eiko, Philips, Plusrite, TCP and

GPH716 Biostatistics: Final Project Document This course is meant to provide you with an introduction to the procedures in the collection, summarization, analysis, and presentation of data. The final project for this course will be a final report. This report will be similar to a research article that you would submit to a journal except you will

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button. Original Source Material Student Version Measured by their functional value, the creation of the houses of confinement can be regarded as a failure. Their disappearance throughout

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Question 6 What is the correct method for calculating a percentage? Divide the total number of participants by the total number of participants in a group and then multiply by 100. Divide the total number of participants in a group by the total number of participants and then multiply by 100. Subtract the total number of participants in a group

Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line. (Each pair of variables has a significant correlation.) Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. The caloric content and the sodium content (in

If a student got a z-score of 3.10 in this class, which of the following is true? A. Compared with other students in this exam, this student didn't do well. B. This student is just around average. C. Compared with other students in this exam, this student did extremely well. D. There is no way to tell about the performance of this student.

DUE BY 9 AM 10/29/16 Sampling, Probability, the Binomial Distribution, Null Hypothesis Testing. (9 pts) Suppose a large set of scores is normally distributed (M = 90, SD = 10). If one score is randomly sampled from the distribution, what is the probability that it will be: A) Less than 94? B) Between 83 and 98? C) Less than 75? For each part of

Thread View Now that you are familiar with the basic concepts of statistics, what are some examples of when you have seen or heard statistics used inappropriately?

Numerical facts are usually subjected to statistical analysis with a view to helping a decisionmaker make wise decisions in the face of ___________________. a) Interpreting b) Uncertainty c) Summarizing d) Organizing

if g'(8)=8 and h'(8)=18, find f'(8) for f(x)=(1/2)g(x)+(1/5)h(x)

1. A review of voter registration records in a small town yielded the following table of the number of males and females registered as Democrat, Republican, or some other affiliation. Which of the following bar graphs represents the distribution of Democrats, Republicans, and other affiliations in this town? A. B. C. 2. In the table below we

19 6 17 6 14 22 14 6 19 15 13 6 12 12 5 22 5 12 11 6 8 14 6 19 5 9 17 14 22 7 13 18 7 6 3 7 10 7 15 12 5 4 11 8 9 15 11 9 10 6 15 6 3 9 17 19 7 13 19 15

1\u0000.\u0000 \u0000I\u0000n\u0000 \u0000a\u0000 \u0000h\u0000y\u0000p\u0000o\u0000t\u0000h\u0000e\u0000s\u0000i\u0000s\u0000 \u0000t\u0000e\u0000s\u0000t\u0000,\u0000 \u0000\u0003 \u0000(\u0000a\u0000l\u0000p\u0000h\u0000a\u0000)\u0000 \u0000i\u0000n\u0000d\u0000i\u0000c\u0000a\u0000t\u0000e\u0000s\u0000 \u0000

1)Assume the Poisson distribution applies. Use the given mean to find the indicated probability. Find P(5) when mu=6. P(5)= ????? 2)Construct the confidence interval for the population mean mu. c=0.90, x overbar equals 15.8, sigma=4.0, and n=35 A 90% confidence interval for mu is ( , ) ???? 3)Perform the indicated calculation. 8C4/11C4???

Question: The pairs of articles I have chosen to use in project part I. Identify the health question addressed within those two articles and debate on them. Please see the attachment for the articles. Noting that the class is Basic Bio-statistics Identify the health question addressed within those two articles and debate on them. Copyright 2012

G180 Module 09 Assignment 1. Find 3 different Hamilton circuits in the graph above. 2. Find a Hamilton path that starts at A and ends at B in the graph above. A B E D C 3. How many distinct Hamilton circuits does the graph above have? 4. How many edges are in K15, the complete graph with 15 vertices? 5. Explain why the graph below has no Hamilton

What is the null hypothesis tested by analysis of variance

the closing stock price of ahmadi inc for a sample of 10 trading days is shown below. day 1 83/ day 2 77/ day 3 84/ day 4 88/ day 5 76/ day 6 90/ day 7 91/ day 8 83/ day 9 92/ day 10 86 compute the following measures a. the mean b. the median c. the mode d. the range

Computer, the correlationcoefficient, using the following data. x 4 6 5 7 1 3 y 7 8 8 9 4 5 r= (round to three decimal place)

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In a set of 110ACTscores, where the mean is 26and the standard deviation is 5.39, (a) how many scores are expected to be lower than 20.61(one standard deviation below themean)? (b) How many of the 110scores are expected to be below 36.78(two standard deviations above themean)?

Peter and Paul are taking a physics course which has only three grades: A, B and C. The probability that Peter gets a B is 0.3. The probability that Paul gets a B is 0.4. The probability that neither gets an A but at least one gets a B is 0.1. What is the probability that at least one gets a B but neither gets a C?

The following table gives the demand and supply schedules for widgets. PRICE QUANITITY DEMANDED QUANTITY SUPPLIED $25 164 260 $20 176 240 $15 188 220 $10 200 200 $5 212 180 The equilibrium price in this market is $ _______. The equilibrium quantity in this market is ________ units.

1. The parent function of the following graph is f(x) = 2x. What is the equation of the following graph? 2. x Determine if the equation y = (0.9) represents exponential growth or decay. 2. This is a decay graph. Explanation: Drawing the graph, we observe that y begins with a very large value. Subsequently, for increasing values of x the values of

Raw Data Month January February March April May June July August Septembe r October November December January February March April May Year 2008 2008 2008 2008 2008 2008 2008 2008 2008 Sales 27 24.2 25.6 28.5 30.8 31.5 34.9 32.5 30.4 AdsCost 550 425 450 625 650 675 700 650 550 Unemp 4.6 4.3 4.6 4.3 4.8 5.2 5.6 5.8 5.5 2008 2008 2008 2009 2009 2009

Identify the sample space of the probability experiment: recording the number of days it snowed in Cleveland in the month of January.

At a sorority meeting, there are 6 seniors, 4 juniors. If a committee of 2 is formed, find the probability that 1 of each will be selected.

The daily sales at a convenience store produce a distribution that is approximately normal with a mean of 1190 and a standard deviation of 141. The probability that the sales on a given day at this store are more than $ 1,405, rounded to four decimal places, is:. The probability that the sales on a given day at this store are less than $ 1,305,

Find the sum of the areas under the standard normal curve to the left of z = -1.25 and to the right of z = 1.25.

You volunteer some of your spare time to your local fire department and have been asked by an assistant chief to analyze data on firefighters who applied for promotion. The assistant chief wants to ensure that gender bias is not a concern in the promotion of firefighters. Shown below is data for 50 firefighters who applied for promotion and the

David was interested about the performance of a sports car, but was confused about scatterplots. Tasha collected some performance data from the internet about the car's engine. Specifically, she plotted the horsepower against the engine speed (in 1000 revolutions per minute). The points fall closely on a line. Using the data values Tasha

A researcher believes that college students spend less time participating in extra-curricular activities than they did ten years ago. An SRS of 100 college students found that in the past year the mean amount of time spent per semester in extracurricular activities was 107 hours with a standard deviation of 45 hours. Assume that the distribution

what statistical test would I use to test a hypothesis of 2 independent variables?

Discuss the advantages of nonparametric tests. Include reference source.

In a study of 1228 randomly selected medical malpractice lawsuits, it is found that 956 of them were later dropped of dismissed. Construct a 99% confidence interval estimate of the proportion of medical malpractice lawsuits that are dropped or dismissed. I know the answer: E=0.034 [0.663; 0.731], but I need to see the work in how it is solved.

Correlation is used to determine the strength of a relationship between two variables. What kind of variables? Quantitative ones. The result of a correlation will be a number ranging between -1 and 1. Define how we interpret this number. Strong, weak, negative, positive. Provide an original example to support your discussion.

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a horse race has 11 entries and one person owns 2 of those horse. assuming that there are no ties, what is the probability that those two horses finish first and second(regardless of order)?

Suppose that the compact submanifold X in Y intersects another submanifold Z, but dim X + dim Z < dim Y. Prove that X may be pulled away from Z by an arbitrarily small deformation, i.e. given e > 0 there exists a deformation Xt = it(X) such that X1 does not intersect Z and |x - i1(x)| < e for all x in X

For the following X and Y scores, how much of the variability of Y is accounted for by knowledge of X? Assume a linear relationship. X 20 15 6 10 Y 6 5 4 0

What statistical test did the researchers use to determine if there was a statistically significant difference in levels of self-esteem between the boys and the girls? What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?

Q3 A car manufacturer claims that its new car gives a mileage of at least 10 kms. per litre of petrol. A sample of 10 cars is taken, and their mileage recorded as follows (in km.p.l) 11.2 10.7 11.3 11.0 10.8 10.7 10.6 10.6 10.7 10.4 Is there any statistical evidence to support the claim of the manufacturer about mileage of its car?

Market researcher Ally Nathan is studying the relationships among price, type, and consumer demand for acoustic guitars. She wants to find the relationship between demand and price, controlling for type. To determine this she should run a :

The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. What is the probability that average length of a steel sheet from a sample of 9 units is more than 29.95 inches long? Please show your work.

In a one-tailed hypothesis test, a critical point is a point that divides the area under the sampling distribution of a: population parameter into two rejection regions and one nonrejection region statistic into one rejection region and two nonrejection regions statistic into one rejection region and one nonrejection region population parameter

In a homicide case, different witnesses picked the same man from a line up. The line up contained 5 men. If the identifications were made by random guesses, find the probability that all witnesses would pick the same person

Consider the sensitivity report below for problems 1-4. 1. Which of the following constraints are binding? Packing only Additive only Extrusion and Packaging Extrusion only All constraints are binding 2. What is the increase in the objective value if 2 units of extrusion are added? 3 Not enough information provided 96 6 48 3. What is the increase

For the specified margin of error and confidence level, obtain a sample size that will ensure a margin of error of at most the one specified. margin of error= 0.02; confidence level 95% n= ?

DLH(X) 20 25 22 23 20 19 24 28 26 29 27 25 28 32 35 34 30 36 ILE(Y) 361 400 376 384 361 360 427.2 458.4 450.8 475.2 462.6 445 511 550.8 587.8 574.1 535.4 591.5

The manager of a pizza chain in Albuquerque, New Mexico, wants to determine the average size of their advertised 16-inch pizzas. She takes a random sample of 25 pizzas and records their mean and standard deviation as 16.10 inches and 1.8 inches, respectively. She subsequently computes the 95% confidence interval of the mean size of all pizzas as

ODM ONM 127 137 112 108 123 120 124 110 132 140 127 109 129 141 108 103 103 126 122 128 100 142 125 118 119 96 132 115 106 127 122 129 96 109 139 138 96 109 122 101 121 110 121 91 117 120 117 132 122 111 129 123 116 113 127 105 125 121 119 124 122 137 104 114 109 114 115 97 127 105 106 125 119 114 113 110 116 128 137 98 111 126 129 114 126 117 112

8) The participants in a television quiz show are picked from a large pool of applicants with approximately equal numbers of men and women. Among the last 12 participants there have been only 2 women. If participants are picked randomly, what is the probability of getting 2 or fewer women when 12 people are picked? 11) Find the indicated binomial

The following information is available. H0 : 220 H1 : < 220 A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the .025 significance level. a. Is this a one- or two-tailed test? Two-tailed test One-tailed test b. What

Need solutions for these calculus questions. Need solutions for these calculus questions.

7) A study indicates that 4% of American teenagers have tattoos. You randomly sample 30 teenagers. What is the likelihood that exactly 3 will have a tattoo? 8)An XYZ cell phone is made from 55 components. Each component has a .002 probability of being defective. What is the probability that an XYZ cell phone will not work perfectly?

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