Mathematics Questions and Answers October 09, 2020

(1 point) Suppose z = x2 sin y, x = -5s2 + 312, y = 8st. A. Use the chain rule to find oz and oz at as functions of x, y, s and t. Oz Oz B. Find the numerical values of oz as and at when (s, t) = (4, 3). oz as (4, 3) = az at (4, 3) =

In the formula for Pearson's Chi-square, there is a deviation in the numerator. This deviation, notated by (O-E) in the equation, represents a deviation of: a. Ordinal from Exponential b. Odd from Even c. Observed from Expected d. Odds from Extension

17 please Question 17 0/1 pt 9 10 99 0 Details You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 44 28 23 B 22 30 26 The expected observations for this table would be X Y Z A The resulting residuals are: X Y 7 A What is the chi-square test-statistic for

You are a supervisor at Regional Call Center's Washington, DC, facility. Regional provides contract call center services for a number of companies, including banks and major retail companies. You have been with the company for slightly more than seven years, having joined Regional right after graduating with a master's degree in business

A random sample of 20 customers for a waste disposal company returned the following results for weekly recycling. Both paper and plastic are given in pounds for each household while household is a measurement of how many individuals live in the home full time. Household Size Plastic Paper 2 1.09 2.41 3 1.04 7.57 3 2.57 9.55 6 3.02 8.82 4 1.5 8.72

You have $300,000 saved for retirement. Your account earns 5% interest. How much will you be able to pull out each month, if you want to be able to take withdrawals for 25 years? You want to buy a $31,000 car. The company is offering a 5% interest rate for 60 months (5 years). What will your monthly payments be? You want to buy a $231,000 home.

Question 1 10 pts Activity 1_A: Using Minitab, construct a standard normal distribution to find the area greater than z = 1.80. Upload your distribution here and clearly identify your final answer. Edit View Insert Format Tools Table 12pt w Paragraph * B I Y Av BY Tv 8 v . . . 0.4 0.3 Density 0.2 0.1 0.03593 0.0 1.8 XO The area greater than z =

need answer asap Use the example above to answer the following question. Example: A study starts with 5000 people. Participants are followed for the next 2 years for the development of disease. The table below shows disease development by drinking status. the main exposure of interest. Developed disease Did not develop disease Total Question: 0

8. (10 points) The graph of a function f(:r) is given below. Sketch the graph of the derivative 3

8. (10 points) The graph of a function f) is given below. Sketch the graph of the derivative 10 10

\fThe Minitab output shown below was obtained by using paired data consisting of weights (in lb) of 33 cars and their highway fuel consumption amounts [in milgal). Along with the paired sample data, Minitah was also given a car weight at 4000 lb to be used for predicting the highwayr fuel consumption amount. Use the iniormation provided in the

A bag of M & M's had 3 red, 5 green, 2 blue, and 6 yellow. What is the probability of randomly picking the following colors? Be sure to give answer in reduced fraction. 1. A yellow? 2. A blue or green? 3. A orange?

1) Givens & Required (*Note some questions indicate to include a diagram.) 2) Equation 3) Substitution of values 4) Intermediate steps 5) String number response (if applicable) 6) Final response with therefore statement Relative to a fixed origin, the coordinates of three points A(1, 1, 1), B(4, -1, 3) and C(2, 5, -1), are given. Find the position

A shoe store developed the following estimated regression equation relating sales to Inventory investment and advertising expenditures, 9 = 29 + 10x, + 6x2 where Inventory investment ($1,0005) *= = advertising expenditures ($1,0009) you sales ($1,000s). (a) Predict the sales (in dollars) resulting from a $15,000 investment In Inventory and an

1. You are conducting a study to see if the probability of catching the flu this year is significantly less than 0.26. You use a significance level of =0.001=0.001. H0:p=0.26H0:p=0.26 H1:p <0.26H1:p <0.26 You obtain a sample of size n=144n=144 in which there are 28 successes. What is the p-value for this sample? (Report answer accurate to four

2x + 3 Let f(x) T

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Please include typed or encoded solutions thankyou 1...: U" I 'Emc'? You are hired as a tutorto a tutorial and review center. You are tasked to shaw the answer and solutions to the given problems and expected to present the output to the coordinator and your cotutors an or before March Ii. 2'32? for discussion and checking purposes. Use the

Subject: Statistics and Probability Course: PADM 60381 Dataset: states_REG Dependent Variable: Cigarette consumption (cigarettes) Using the cigarette consumption variable as your dependent variable and the cigarette tax (cig_tax) asyour key explanatory variable, do the following: 1. Run a bivariate regression between cigarette consumption

Chyna has 6 green bushes. He counted the flowers on each of them. There are 8, 2, 5, 4, 11 and 9. Find the Standard Deviation. Is 87 a "Usual" number of flowers?

Please don't simplify them and just show them in their product/quotient/chain forms. Thanks!

3. Determine the derivatives of the following functions 2 (2.T2 3) 3 (In ((x2 1)3)

QUESTION 5 A grocery chain wants to know if the three types of advertisements affect the mean sales differently. They used each type of advertisement at four different randomly selected stores for a month and measured the sales (RM '000) for each store at the end of the month. The results are as follow. Descriptives Advertisement Statistic Mean 1

To double the precision of a survey, one only has to double the number of people in the sample Question 22 Dans un texte d'une page a double interligne, vous discutez l'enonce suivant : Pas encore (10 points) repondu Note : La reponse a cette question ne se trouve pas dans les ressources du cours. Vous Note sur 10,00 devrez vous documenter sur

Fast Service Truck Lines uses the Ford Super 1310 exclusively. Management made a study of the maintenance costs and determined the number of kilometres travelled during the year followed the normal distribution. The mean of the distribution was 96 600 km, and the standard deviation 3200 km. What percentage of the Ford Super 1310s logged 104 970 km

please solve for mean and standard deviation carefully savings. Recently, a random sample of 13-18 year olds was asked, "How much do you currently have in savings?" The data in the table represent the responses to the survey, Approximate the mean and standard deviation amount of Click the icon to view the frequency distribution for the amount of

Helpful Hints: For #'s 1-5, no need to apply the substitution technique. impressi As for #'s 6-10, you need to. 1. 3 (tan x-sec x) - dx 5 cos x 6. S VBx - 3 dx 2. (x+6)(x2-1) -dx 7. fx? (5 + 2x3) dx 3. J(4x + # ) dx 8. f 4x2 (1-823)4 dx 4. [cos x-sin x costx-sint, dx 9. fx V1 + x dx 5. (2 cot x-3 sindx 10. tan x dx sin x Helpful Hint: For #'s 11

The weights of ice cream cartons are normally distributed with a mean weight of 10 ounces and a standard deviation of 0.7 ounce. (a) What is the probability that a randomly selected carton has a weight greater than 10.25 ounces? (b) A sample of 36 cartons is randomly selected. What is the probability that their mean weight is greater than 10.25

In r coding for statistics ( please do not forget the syntax) This file contains the composite success rate of 48 different experiments, 24 conducted with just the test subject and the original researcher, and 24 with an observer present. All experiments reported in this sample were conducted on either test subjects A or B, two of the researcher's

Provide step by step solution on how to find the range of this function

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need some help with this graph use your sketch to find the absolute and local maximum and minimum values of f. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) A( x ) = 1 x2 if - 1

Do you think this experiment was an experiment on rats or an experiment on people?

Two employees cover two shifts at a small restaurant, the inter-arrivals of customers follow a Poisson distribution with a rate of 4 customers per hour. The first employee service time follow a normal distribution with mean of 3 minute and standard deviation of 2 minute, while the second employee service times follow a normal distribution with

A particle's position is given by x = 13.0 - 12.00 t + 3 t 2 , in which x is in meters and t is in seconds. (a) What is its velocity at t = 1 s? (b) Is it moving in the positive or negative direction of x just then? (c) What is its speed just then? (d) Is the speed increasing or decreasing just then? (Try answering the next two questions without

If g(x)=ln(3x)g(x)=ln(3x), estimate g'(2)g(2) by finding the average rate of change of gg over the interval [1.9,2.1][1.9,2.1]. Round your answer to 4 decimal places. Select one: 0.4985 0.5020 0.5004 0.4994 0.5014

Explain why the following sentence is inaccurate: \"There is a 95% probability that the true average of Bluebottle length in Australia is within . . . . and . . . . (the endpoints of your confidence interval.}\

Cathy has 13 pictures (6 of family, 5 of friends, and 2 of her pets). She only has room for 8 photos on her mantle. How many ways can she fill the mantle with pictures if she must have at least 5 family photos? (Assume the order of the photos matters).

Question 3 Class Frequency 10-29 6 30-49 11 50-69 14 70-89 15 90-109 8 110-129 2 Approximate the grouped mean. Round to one decimal place

Determine whether the following statement is true. When the estimated slope of a regression model is negative, the estimated correlation coefficient between the two variables can be negative or positive. True O False D Question 3 2 pts Determine whether the following statement is true. Suppose the probability of you winning a chess game against

Find the limit of the following sequence or determine that the sequence diverges. {em} E} Select the correct choice below and ll in any answer boxes to complete the choice. D 11- The limit of the sequence is E. {Type an exact answer.} 0 E. The sequence diverges. Find the limit of the following sequence or determine that the sequence diverges. Inn

V5 V8 1 369 2 972 3 800 3 799 3 477 4 1434 4 614 4 870 4 1944 4 814 4 1517 4 3720 4 1325 4 289 4 381 5 762 5 361 5 25725 5 851 5 2095 5 6724 5 875 5 2144 5 578 5 4500 5 266 5 936 5 369 5 1018 5 698 6 364 6 624 6 1282 6 392 6 1295 6 826 6 250 6 3800 6 5068 7 999 7 665 7 135 7 1799 7 5929 7 725 8 4444 8 1069 8 415 8 260 The sample data you collected

HW 13.1-13.4 Score: 4:30 4524 answered 0 Question 16 v Compute the STS [to two decimals} for a comparison of two population standard deviations or variances given that: a. The sample variances are 19 for Population 1 and 19.3 for Population 2. F: b. The sample standard deviations are 19 for Population 1 and 19.3 for Population 2. F: HW 13.1-13.4

High school students across the nation complete in a financial capability challenge each year by taking a National Financial Capability Challenge Exam. Students who score in the top 14 percent are recognized publicly for their achievement by the department of the treasury. Assuming a normal distribution, how many standard deviations above the mean

Identify the type of study used. A town obtains current employment data by polling 10,000 of its citizens this month.

Patients diagnosed with late-stage heart disease on average have 9 months to live, with standard deviation of survival = 18 months. A pilot study finds that patients who are given comprehensive palliative care live on average for 12 months, with standard deviation of survival = 12 months. How many patients will a follow-up study need, in order to

Please help with steps 5 Question 5, 6.1.47 Points: 0 01 1 Determine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean and o = 14.9. Assume the population is normally distributed. A 99% confidence level requires a sample size of (Round up to the nearest whole number as

(2) Identify the population, parameter, sample, and statistic in the statistical study quoted below. What type of data was gathered in the study? The Gallup Organization conducted a poll of 2425 US adults: 1224 who are Republicans and 1201 who are Democrats. They found that 25% of the Republicans surveyed "worry a great deal about the quality of

Express the region that is described below as a probability. The area under a continuous density curve between :1: = 0.49 and :5 = 0.27, where the horizontal axis is scaLed in units of the random variable a

1. How many ways to choose all six numbers between 1and 36, including different ordering of the same numbers? (This answer must be written in standard form, scientific notation will not be accepted) 2. How many ways there are of arranging the 6 numbers? 3. Calculate the total possible number of outcomes excluding different orderings of the same

1. The graph of y = f (x) is drawn below, sketch a graph of y = f^-1 (x)

Integration by substitution.- 1 . red Tix tan TIX dx 2 . S ( x 4 2 ) 150 2 ( x 4 2 ) 2 dx 3 Svin ax car exdx On trigonometric prancFomation. 5 . f (ear 4 ox - vin 4 ox ) dx ( please provide the complete Rolulis so I can't able MEVEN it .)

Please show all the steps and what theorems you used. Water is continuously added to a large silver tank that initially contains so amount of salt. The volume of water-salt solution in the tank is kept constant by keeping the same rate of outflow as inflow. As well, the amount of salt, denoted s, in the tank depends on the amount of water, denoted

Please show all work.The following problems are applications. You must respond in full sentences to receive full credit. You are graded not only on obtaining the correct values, but in the completeness and presentation of your results. Kappa Airlines has projected the percentage of young adults booking ights on their airlines to rise in the next

N 1+x, OSx51 6.) Evaluate f(x) dx where f(x) = . Make a sketch of the function. 2-x, 1

2 6.) Evaluate where f (x) 3 1 1 11, OSX S 1 Make a sketch of the function. 2x, 1

verify please :)

InCl cos O) InCl cos O) 2 lnsin

Question 20 pls through the given In Exercises 19-22, determine by inspection whether the the graph of the eq given system has nontrivial solutions or only the trivial 26. The line through solution. 27. The line through 19. 2x1 + 3x2 - x3 = 0 28. The conic throu X1 - X2+ 213 = 0 and (4, 0). 20. X1 + 2x2 - x3 + 2x4 =0 29. The conic thro 2x1+ x2+ x3

Research scenario 1: In a study looking at undergraduate students' perceptions of sense of community at their university, a researcher hypothesizes that the farther away students live from campus (in miles), the less they feel they are part of the university community. The researcher collected data for the following two variables - miles from

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For this activity, you will be creating a confidence interval for the average amount time Americans spend using screens. First, we need some data. You will be asking the question, "How screen time do you have in a typical week?" You will need at least 20 pieces of data. Data: screen time in hours Maverick=8 John= 4 Ariel=7 Elaine=3 Jerry=4 Caleb=6

Task 2: Assume you are tested for a disease called conditionitis, a medical condition that you believe afflicts a proportion p of the population, with you modelling p as being beta distributed with parameters" = 1.41 and B = 547.12. The test result is positive, i.e., the test claims that you have the disease. You immediately perform a second,

I need help understanding how the payoffs are calculated below. You are the administrator for a small, locally - owned emergent care facility. You are exploring the options for increasing services, with a likely need for expanding your clinic imaging capabilities. After hiring a consulting firm, you have been given some expected annual payoffs (in

Bacteria growing in human guts have physiological differences in terms of their preferences for optimal growth, particularly the pH. This characteristic influence the presence/absence and abundance of microbes in the guts. In order to explore the effect of habitat preferences, scientists developed an experiment assessing the growth of 2 species of

QUESTION 3 The scores of 18 students are summarised as below. N Ex Mode Q3 score 18 1116 73366 67.00 74.25 a) Calculate the mean and standard deviation. (4 marks) b) Compute the coefficient of skewness. Hence, comment on the shape of the distribution. (3 marks) c) Explain the meaning of the value for third quartile (Q3) for this study. (1 mark)

Let /(x )= X (a) Simplify f(2 + h) - 1(2) h Algebraically simplify your answer until you have cancelled out the factor of h in the denominator. (b) Evaluate lim f(2 + h) - f(2) h-0 h If an answer does not exist, enter DNE. (c) Determine the equation of the line tangent to y = f(x) at x = 2. y

Yoonie is a personnel manager in a large corporation. Each month she must review 12 of the employees. From past experience, she has found that the reviews take her approximately 4 hours each to do with a population standard deviation of 0.9 hours. Let X be the random variable representing the time it takes her to complete one review. Assume X is

Homework 6: Problem 3 Previous Problem Problem List Next Problem (1 point) Determine if the following sequence converges or diverges. an = eon Note: If it converges, enter the limit as your answer. If it diverges to co, -co, or neither enter infinity, - infinity, or divergent, respectively

Jump to level 1 Each character in a password is either a digit [0-9] or lowercase letter [a-z]. How many valid passwords are there with the given restriction(s)? Length is 19 or 11, and must start with a digit. Ex: 26* 36121 Write a as: a^b 5 Check Next

A national survey was conducted to study investor sentiment. The survey targeted adult Canadian investors who had purchased or sold investments in the previous 12 months and who had owned at least one investment product at the time of the survey. One of the questions asked was: "Do you expect an improvement in your personal portfolio over the next

LCA of Electricity Production and Consumption from Two Technologies In this problem estimate the life cycle impacts of producing electricity from 2 technologies. This data will then be used to estimate the life cycle impacts of California's electricity system. Much of the data has been pre-calculated for you to help shorten the homework problem.

Answer A &B. Show excel formulas A genetic experiment with peas resulted in one sample of offspring that consisted of 442 green peas and 166 yellow peas. a. Construct a 90% confidence interval to estimate of the percentage of yellow peas. b. Based on the confidence interval, do the results of the experiment appear to contradict the expectation

2. It is thought that a new process for producing a certain chemical may be cheaper than the currently used process. Each process was run 10 times, and the cost of producing 100 L of the chemical was determined each time. The results, in dollars, were as follows: New Process 55 56 58 59 60 59 56 63 66 70 Old Process 58 57 64 63 55 62 58 59 62 68

Find the center dfmass dfalarnina as pictured below, with inner radius 4 and outer radius Er, with density.r I function {1(3, 3:} = Elf+3.3 til HI n n

Consider the following data: Number of Deaths in the U.S. by Drug Overdose Year 2000 2001 2002 2003 2004 2005 2006 2007 2008 Deaths 17,032 17,512 14,313 13,352 17,753 14,536 11,153 18,658 16,645 Step 2 of 2 : Find the three-period moving average for the year 2005. If necessary, round your answer to one decimal place. Answer Tables Keyb

You are asked to evaluate the surface area of the triangular portion of the plane 2x + 5y - z = 6 in the first octant. If the projection is on the xy-plane, which of the following would be the integrand (function inside the double integral)? O /4x2 + 25y2 + 1 O sqrt(7) O sqrt(30) O None of these. O sqrt(29) O sqrt(8) O 1

Which interpretation of the slope of the regression equation is correct. Use the table for data. The study is looking at number of clients called on the phone and unit sales. Regression Multiple R 0.65 R square 0.42 Intercept 91.50 Calls 7.00 For every client called on the phone, unit sales increase by 7 The slope is a + bx so 91.50 + 7(calls)

Find the absolute maximum and minimum values of the following function on the given interval. Then graph the function. g(x) =19-x , -25x53 Find the absolute maximum value. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The absolute maximum value occurs at x = (Type exact answers, using

x 6.2: Graded Homework X C egcc.instructure.com Question 5 FA22_FOURTH Home What function is graphed below? O Announcements Account Syllabus Assignments Dashboard Grades Courses People 898 Pages Calendar Modules Google Drive Inbox Office 365 Of (z) = 27 History of ( 20 ) = ( 3 ) Studio of (z) = (2) ? Of (20 ) = 5 Help of ( 2 ) = ( 5 ) of ( 20 ) =

6.12 Starting at noon, diners arrive at a restaurant according to a Poisson process at the rate of ve customers per minute. The time each customer spends eating at the restaurant has an exponential distribution with mean 40 minutes, indepen- dent of other customers and independent of arrival times. Find the distribution, as well as the mean and

Do you believe that statistics can be used to prove either side of any argument? Why or why not?

Guided Exercises: on the right, state which data gathering technique (sampling, census, simulation, experiment) is better suited to carry out the following studies. In addition, justify your answer, e.g., why? b) Analyze the amount of time that first year nurses spend studying at home to prepare for their shifts c) Study the effects of a vitamin D

Please sir help 1. Using the following frequency distribution, construct a histogram and an ogive. Temperature Frequency 28-30 31-33 34-36 JO-AW- 37-39 40-42 43-45

............. Tangent Line. If p(x) = 3x2+ 3x3 + 8 3 + 3 (a) Then p'(1) = (b) The equation of the tangent line to the function p(x) at x = 1 is y= Submit

questions below: Find all solutions to the system using the Gauss-Jordan elimination algorithm. 15X1 + 15X2 + 3X3 = 3i 30x, + 45X2 - 3iX3 = 0 15x, + 30X, + 3X3 = 3i . . . Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The system has a unique solution. The solution is x, = X, = X2= O B. The

for the next function

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According to an article in Newsweek, the natural ratio of girls to boys is 100 : 105. In China, the birth ratio is 100 : 112 (47.17% girls). Suppose you don't believe the reported figures of the percent of girls born in China. You conduct a study. In this study, you count the number of girls and boys born in 150 randomly chosen recent births.

D Question 43 The derivative of arcsec(2x) is o o o I 4t2 2 o 232 I Previous 2 pts Next

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We learned at the outset of the semester some differences between Variance and Standard Deviation . One important difference is that variances (of independent variables) can be effectively added together to yield new information about the combination, while standard deviations cannot. We're used to taking the square root of the Variance to get the

2 7 If h (t) is an even function, h(t)dt = 26, and h(t) dt = 14, what does the following integral - 2 2 equal? h(t) dt = 0

Differentiation and applications The derivatives of and (* Ignore this section* - wk 3-4, 7G Q6-7) ) Please answer the questions on the attachment below. ( ON PAPER/WRITTEN ) ( Please keep solving and explanation seperate) 6 Differentiate each of the following: a y = sin (2x + 3) b y = sin (6 - 7x) c y = sin (5x - 4) d y = sin 3x + 2 e y = sin

9. Find the linearization L(x,y) of the function at each point. f (x, y) = e cosy , P(0, 1/2)

FEEDB Content attribution QUESTION 20 . 1 POINT The five-number summary for a set of data is given below. Min Q1 Median Q3 Max 40 69 72 79 86 Using the interquartile range, which of the following are outliers? Select all correct answers. evious

Find an equation of the tangent to the curve at the given point by two methods: (a) without eliminating the parameter and (b) by first eliminating the parameter. x =1+t^(1/2), y=e^(t^2); (2,e)

2.3 Exponential Modeling [FA22-SP23] Angela Thomas Exponential Regression Sometimes when we are working with exponential models we are given data and we need to use Excel to find the model. Consider the following scenario: A population of rabbits has been recorded over several years (See table below). Write an exponential regression equation that

Context: Factorial Design: This study is a 3 (web intervention: control, website no support, and website with professional support available) by 2 (gender: male or female). Part IV: Expected Results You would be using an ANOVA, so say something about 2 X 2, or 2 X 3 ANOVA. Also, what main effects are you predicting will be significant, and will

Question 4 A marketing research company surveyed students from Faculty of Sciences and Faculty of Art to find the percentage of the students who like playing football. The data are given below. Sample Size Number who like playing football Sciences 392 56 Art 286 72 Assumer the populations are normally distributed. The marketing research company is

Buses arrive at the station randomly and independently, at a rate of 1 per five minutes; the number that arrive in t minutes is thus a Poisson random variable B with = 0.2t. (a) Calculate the probability that exactly two buses come in a 10 minute interval. (b) How much time should you allow so that there is a 0.99 probability that at least one bus

Please help with 13, 14, 15 Sampling Distribution Suppose it is known that among all people who went trick-or-treating, 37.3% also visited a haunted attraction. If a simple random sample of 160 people who went trick-or-treating is selected and the proportion of this sample who also P visited a haunted attraction determined, if appropriate describe

Problem : Use an appropriate form of the chain rule to find dz/dt 1. z = 3x y; x = t4 andy = t 2. 2 = 3cos a - sindy ; C= t and y = 3t 3. z = el -zy =t andy

calculus 3 1. Turn in: Use Geogebra (or a graphing tool of your choice) to draw the paraboloid x + y = = . Then draw the plane = = 2y+3 . This plane will cut the paraboloid. Rotate the view so that you look directly into the xz-plane. Visually identify the shape of this intersection plane. What is its shape? Then use Algebra to solve

Exercise 5: Using the information in the table below, calculate (round to one decimal place) the percentage of occupancy for each day and then for the first ten days of the month. Macomb Community Hospital December 20XX 75 beds Date Inpatient Service Day Percentage of Occupancy 1 74 2 73 3 70 4 71 5 68 6 67 7 66 8 54 9 59 10 69 First ten days of

find the directional derivative of f(x, y) =y^2/X^2+1 at the point (4, 1) in the direction of (1, 1).

If f (c)da 22 and 10, what is the value of 113 f (c)dc D. 12 E. 16