Mathematics Questions and Answers October 04, 2020

etermine whether A MNPA QRS Justify your reasoning R 38 in 54 in 47 38 in N S M 32 in 28 in 54 in Q

1 To find the distance d across a stream Levi located points as shown in the figure Use the given information to find d lifelong B 12 m C E 6 m 12 m D

Step Two Using the Centroid 7 ond the triangle Justi

tep Two using the Centroid

5 6 rectangular pyramid correct unit in your answer 8 yd 7

rectangular pyramid. correct unit in your answer. S yd

Do the given vectors form an orthogonal basis for R Yes the given set does form an orthogonal basis for R O No the given set does not form an orthogonal basis for R You are given the theorem below Let V V V be an orthogonal basis for a subspace W of R and let w be any vector in W Then the unique scalars c C such that W C V SKK are given by W V for

Using the Intermediate Value Theorem show that the function f has a zero between a and b f x x 3x 2 9x 13 a 5 b 4 What is f 5

P t AP t 2P 1 t n 0 Po t AP t n 0 Po t At Po t lim At At 0 1 0 1 Multiplying both sides of A by z and taking summation for n 1 2 00 we get En0 Pn t z En 1 Pn t z En 1 Pn 1 t 2 Log P z t M z 1 t E To determine E we put t 0 to get Log P z 0 E P z 0 02 P 0 P z t ed 2 1 Now Pn t can be defined as P z t P t dp z t 0 P z t at e at n P z t P 1 2 n 0 P z

The vector v has initial point P and terminal point Q Write v as a position vector P 12 17 O A O B O C O D 6 7 5 12 6 5 67 5 12 7 10 6 5 7 12 7 12 5 12

s in Economics Sprit omework Part II Find the marginal il x 15

in Economics, Spri omework, Part I Find the marginal

ow much money should be deposited today in an account that earns 5 compounded semiannually so that it will accumulate to Click the icon to view some finance formulas me amount of money that should be deposited is Cound up to the nearest cent Formulas In the provided formulas A is the balance in the account after t years P is the principal

ABCD is a square inscribed in a circle and circumscribed to another concentric circle with the first one A B 3 D C Show Transcribed Text Knowing that the area of the larger circle is 100 and that the area of the square ABCD is 200 determine the exact value of the area of the colored region Displays the requested value in square meters Solution

Starting from the point (3,1,4) reparametrize the curve r(t)=3+3t, 1+2t ,43t in terms of arclength. r L (l)= < , , >

Thirty random college students are asked if they study during the week. Since 60% said yes, a statement can be made that 40% of students only study on the weekend.

In a standard normal model what is the probability of z being less than 0.72? Provide your answer as a decimal value to 4 decimal places with a leading 0 ; example 0.2542

Let the random variable follow a normal distribution with = 80 and 2 = 100. Find the probability that is greater than 60. Find the probability that is greater than 60 and less than 82. The probability is 0.1 that X is greater than what number?

Question 16 (5 points) Calculate the period (t=7)'s forecast using a non-linear trend equation technique: F+= 7.57 -.0512 + 2.82t O 24.86 19.69 O 24.69 20.96

Find the exact length of the curvee

Find the locations and values of all relative extrema for the function with the graph below Ay X 10 -8 -6 4 26 2 4 6 8 10

. Question 6 0/10 pts 9 100 98 0 Details A volume is described as follows: 1. the base is the region bounded by y = eco, y = 2.6x + 0.4 and x = 1; 2. every cross section perpendicular to the x-axis is a square. Find the volume of this object. volume = Question Help: Video Message instructor Submit Question Jump to

A couple plans to have three children. The probability of having a girl is 0.5. The gender of each child is independent from another. What is the probability that the couple will have 3 boys? (answer in decimal form)

A manager at Best Buy believes that female agents were selling less expensive televisions than males. A sample of 64 televisions sold by females, revealed a mean price of $350,000.A similar sample of 49 televisions sold by males, revealed a mean price of $360,000. The population standard deviation for females is known to be $21,000 and for the

A study quoted in The Toronto Star suggested that mathematics should be taught in the afternoon rather than in the morning. We sample n students to ask if they agree with this statement. We wish to estimate the true population proportion of students who agree, with confidence 95% and an error of at most B = 0.06. How large a sample size is needed?

For the experiment describedbelow, let x determine a randomvariable, and use your knowledge of probability to make a probability distribution. Three balls are drawn(with replacement) from a bag that contains 5 red balls and 4 green balls. The number of green balls is counted. Show a probability distribution for the given experiment. (when x = 0,

Let X be a random variable with density fX(t) = t(t 2 3 )1[+1,+1] with , R, > 0. (a) Find in terms of . (b) Find the cumulative distribution function of X. (c) Calculate P( < X 1). (d) Consider g : RRdefined as g : x 7x3, i.e. g(x) = x3. What is the probability density function of the random variable Y := g(X)

What statistical concept/technique do you think will be the most helpful for you in your future career as a Psychologist? Please specifically identify and describe one concept or technique and explain how you think it will be helpful to you

A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 430 college students showed that 19% of them had, or intended to, cheat on examinations. Find the 95% confidence interval for the population proportion. Round to four decimal places.

Differentiate, please STATE what formula are you using and show every step and detail. Write down on paper.

sec(4x)cos(1x) sin (tan(3x)) 2xA2)A3 cscx(xcotx)

Find the mean for the data items in the given frequency distribution. Round to the nearest hundredth, if necessary. Score Frequency 6.03 5.28 6.62 O 7.95

what is a scatter plot and what do they reveal? Make sure you put where you found the information please

[-/1 Points] DETAILS SCALCET6 8.1.002. Use the are length formula to find the length of the curve y = v 2 - x2, 0 s x $ 1. Check your answer by noting that the curve is part of a circle

Let Y1

4

Consider the following shaded region. Find the area S of this region if a = 2, b = 1. S =

Score: 0/ oo Question 7

O Question 7 In 2018, ACT scores were normally distributed with a mean of 20.3 and a standard deviation of 5.5. What is the probability that the mean of 34 randomly chosen scores is greater than 19.2 If there are two answers, list both answers separated by a comma. Submit Question

Question 1(Multiple Choice Worth 1 points) (06.03 MC) Select the interval for which the function f is increasing, if f(x) = ], (1-213) or. O (-0.707, 0.707) O (-00, -0.707) O (-00, 0.707) O (0.707, Do)

Problem 2. (1 point) f(x) g(x) The graphs of f(x) and g(x) are given above. Use them to evalu- ate each quantity below. Write DIE if the limit or value does not exist (or if it's infinity). 1. f(1)g(1) 2. lim If (x) + 8(x)] x-+2 3. f(g(2) ) 4. f(1)/8(1)

1 point 1. For an assignment, Sandra created several 3 by 3 magic squares. Which magic square below is not correct? A. B. 8 6 S 3 5 4 2 C. 8 D. 4 9 2 3 4 5 O A O B O C O D

Identify the notation for the given number. A c ollege has 3427 enrolled students. When 50 of them were randomly selected for a survey, it was found that 10% of them were in favor of fees for parking permits. Write out the steps of your answer.

Please help me with these questions by showing me all work. Thanks!

Calculate the probability of winning: Roll two standard dice. You win if you get a sum of 4 or get a sum of 8. leave as percent to one decimal.

What are the log odds? A student survey reveals that only 564 of 1200 students surveyed voted in the past student government elections. What are the log odds that a student voted in the past student elections

QUESTION 1 Let X=the amount of cereal packed into a boxand assume we knowX-N(500, 8^2).If we take a sample of size10,what distribution will the sample mean(X-bar =1/10 sum xi)follow?

W hat information does SS provides us about a set of data and under what circumstances will the value of SS equal 0 and is it possible for SS to be negative?

A head of romaine weighs 1 pounds. The yield percent for romaine is 75%. How many heads of lettuce should you order if you need to serve 45 people a 4-ounce portion each of cleaned lettuce?

In a manufacturing process, a random sample of 9 bolts has a mean length of 3 inches with a sample variance of 0.09. What is the margin of error of a 90 percent confidence interval for the true mean length of the bolt? Round your answers to three decimal places. 0.000

Can you do it faster please . The p.d.f. of the future lifetime, T for (a) is assumed to be 1 fT (t) = 80 ' if 0

How to solve this question? 8. Let X1, ..., Xn be a random sample from a population with pdf 20-2xe-27102 x E (0, 00), f (2 0) = 0, otherwise, where 0 E O = (0, co). Find a uniformly most powerful (UMP) test for testing Ho : 0 0%, where do > 0 is a fixed real number. Hint: consider the statistic T(Xn) = En- in X2

11. in a single-sample t test, suppose the mean of your sample 1 is 90, the mean of population 2 is 75, and the standard deviation of the distribution of differences between means is 6. What is the t score?

A random sample of 20 employees was collected from Brac University, to estimate the average daily time they spent on social media. Suppose that the population times have a normal distribution with a mean of 85 minutes and a standard deviation of 13 minutes. (answer in three decimal places) What is the probability that the sample mean is outside

The dataset below Universities.csv contains information on 1302 American colleges and universitiesoffering an undergraduate program. For each university, there are 17 measurements that includecontinuous measurements (such as tuition and graduation rate) and categorical measurements (such aslocation by state and whether it is a private or a public

College students have travel distances that are approximately normally distributed about a mean of 25 miles and a standard deviation of 10.7. A random sample of size 30 is taken and a mean is calculated. What is the probability that this mean will be between 20 miles and 30 miles?

32. The probability that Paula passes mathematics is 2/3 , and the probability that she passes English is 4/9 . If the probability of Passing both courses is 1 , what is the probability that Paula will pass at least one of these courses? 1/4; (31/36)

It is claimed that in a bushel of peaches, less than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the z -test statistic? Select one: a. +0.125 b. +0.278 c. -1.645 d. +1.667

Obtain the distribution function of Y. Let X1, ..., Xn bei.i.d. random variables with common distribution function F. Define Y = min{ X1, ..., Xn}. Obtain the distribution function of Y

need help. Time Spent in Studying and Recent Grade STEPS SOLUTIONS 1.) In the right side are the grades of the students in English 10. Student Hours Grade 90 93 90 90 2.) Graph the points corresponding to the bivariate Graph: data. 3.)Identify the variables and describe how the points are scattered

Given the analysis of variance table below for a simple linear regression model with 22 observations, if testing H o : ?Beta 1 = 0, the p- value of the test statistic t is:(see attached)

QUESTION 23 . 1 POINT The five-number summary for a set of data is given below. Min Q1 Median Q3 Max 57 70 75 79 83 What is the interquartile range of the set of data? Provide your answer below

please complete the questioons below Inl'l In, 1. At the local athletics club, the expected number of people that can run 100 metres in under 13 seconds is 4.5 and the variance is 3.15. The data is Binomially distributed. a. Find the probability p [2 marks] b. Find the number of trials n [2 marks]

3. On January 1, 2018, Abigail Adar borrowed P12,000 and agreed to repay it with P4,650.70 interest. If the interest is 6% compounded quarterly, what amount must she repay and on what date?

What is a Contrast of a t distribution from that of the standard normal distribution?

how is this solved The sampling distribution of the sample mean is shown. If the sample size is n = 9. what is the standard deviation of the population from which the sample was drawn? Round to the nearest thousandth. O A. cr=0.540 O B. 6=0.0D7 O C. 0:0.180 Click to select your

Determine the number of people that attended only one (but any one) of the three grand slam tournaments.

need additional support Homework. 4-2-1. MyMathLab Score: 0 of 1 pt 10.2.13 Determine the simple interest. (Assume 360 days in a year.) p = $507, r=0.043% per day, t =6 months The simple interest on $507 at 0.043% per day for 6 months is $ (Round to the nearest cent.) Enter your answer in the answer box and then click Check Answer. All parts

The weights (in ounces) of 24 tomatoes are shown below. 2.0, 2.1, 2.2, 2.4, 2.4, 2.5, 2.5, 2.6, 2.6, 2.7, 2.7, 2.7, 2.7, 2.8, 2.8, 2.8, 2.9, 2.9, 3.0, 3.0, 3.1, 3.1, 3.2, 3.4 What is the 5 Number Summary for this data

Provide an appropriate response. Find k so that the line through (3, k) and (1,-2) is parallel toFind k so that the line is perpendicular to -4/5;0 -4/5;-4 16/5;-4 16/5;0

Find the bestpredicted value of y given that x = 21If the equation of the regression line is: Y= 44- 22.222 X Indicate your answer with appropriate significant digits

The linear correlation between an independent (x) and dependent (y) variable: A. Is the foundation for simple (bivariate) regression B. Does not indicate a causal relationship, though one might exist C. Can be direct, inverse, or nonexistent D. Can be used to predict the value of y for any observed value of x E. All of the above F. None of the

Hello tutors kindly answer this. About statistics and probability. Click this link to view the file: https://drive.google.com/file/d/18tfh8cUzgZKLc2TamWwzUdOPFxRnCoPT/view?usp=drivesdk https://mega.nz/file/CtAV0aRQ#cEqhaGN7_nM0iir2yyXiS7Ru4fSzP-0rTU2SYpSyMss P.s: use Microsoft excel.

Need help with solving questions b and c manually (without using statistical software or Excel). Shop Now Month11 = I II NovelLiver 0 otherwise Other than this change, the multiple regression approach for handling seasonality remains the same. EXERCISES . . . .'. . .. . . . . . . . . Methods 28. Consider the following time series. Quarter Year 1

A. Create two hypotheses. A1. One must be able to be tested using an independent means and independent samples t-test. A2. One must be able to be tested using a dependent means or paired samples t-test. B. Describe the variables you used in your hypotheses. B1. 1. Describe the variables in words. C. Fill in the blanks: "After reviewing the social

doi:10.1016/j.apnr.2008.08.002 Do these results support the hypothesis? Should the hypothesis be accepted or rejected? Hypothesis 1.1. The structure and content of this program will reduce EE and, as a result, reduce feelings of DP and enhance feelings of PA. Hypothesis 1.2. The use of art therapy, relaxation training, and wellness plans is

Imagine that we are observing two different police officers for their shooting accuracy. The first officer practices almost every day year-round. After watching her for a while, we estimate that she will hit the target 85% (=.85) of the time. The second officer is similarly observed and his accuracy is estimated at 15% (= 0.15; somewhat poor). (20

Help Please Using the binomial probability distribution, if n = 8 and p = 0.32, what is the probability of getting exactly 4 successes? 0.186 0.157 0.145 0.324 Question 2 A poison hot line receives, on the average, four calls per hour on its toll-free number. For any given hour, what is the probability that it will receive at most five calls in

Group Statistics Gender N Mean Std. Deviation Std. Error Mean Satisfaction Male 21 48.4286 10.87461 2.37303 Female 21 32.2381 8.89328 1.94067 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95%% Confidence Interval of the Significance Std. Enor Difference F Sig t df One-Sided p Two-Sided p Mean

(SHOW YOUR WORK!) Use the function f(x) = 3x2 - 11x + 4 for parts a, b, & c. a. Find the average rate of change between x = 2 & x = 5 b. Find the instantaneous rate of change at x = 5 c. Find the function for the tangent line at x = 2

a neurobiologist wants to take a sample of students at her university to participate in a behavioral memory face-recognition task. How many students will need to be tested if she wants to estimate with 99% confidence the true proportion to within 2%,if she believes that 75% of students could successfully perform the memory face-recognition task?

A person gets on a Ferris wheel at the starting point. The starting point is 15 feet off the ground. The Ferris wheel has a radius of 50 feet. What is the height of the rider from the ground after the Ferris wheel rotates 1 17 radians? 12 (50 cos 0, 50 sin 0) 115 12 50 ft. 15 ft starting point O A. " (-V2 + V6 ) + 65 O B. 25 2 (-V2 +V6)O C. 25

What is the T-statistic Data table Before Deep Breathing After Deep Breathing 22 20 25 19 15 10 28 12 13 11 16 8 15 10 12 9 D Question 1

If x2 y + xy? = 0 implicitly defines y as a function of x, then what is dy dx at the point (1,-1)

2. Use the Lagrange multiplier method to solve each of the following problems: a. Optimise 2y - x2 subject to y = 5x - 10 b. Optimise y - x2 subject to y = 6x - 9

The semicircle function f(c) has undergone a series oftransformations f(x) Y f, (c) f3(x) Here are the corresponging graphs f4 You are asked to identify each graph transformation and give the formula for each transformed functiorL For the transformation (c) f2(c), we select correct transformation For the transformation f2(c) f3(c), we select

23 stion 23 The distribution of body temperature for a sample of healthy adults is known to be bell-shaped and symmetric with a mean of 97.75 degrees F and a standard deviation of 0.90. 1 points Sa Calculate the z-score for a body temperature of 98.30 degrees F. Hint, the z-score formula is (value - mean) / (standard deviation) O a. -0.61 O b.

4-92 Debido a la situacion economica mundial, todos los dias se consultan a expertos del mundo academico, iniciativa privada y gobierno sobre la situacion economica futura y la prediction de la mismo En una encuesta realizada a 500 expertos parte de la informacion se perdio, resultando la siguiente tabla de contingenciesparcial. Con base en los

Q13. Suppose a connected graph, G, has 14 vertices. How many edges must there be in a spanning tree of the graph, G?

Which of the following expressions is the definition of the derivative of f(x) = vx at the point (3, 0 h O lim Vx+h- vx h-0 h O lim V3 +h - vn h-0 h

Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use training wheels. It was revealed that they used them an average of eleven months with a sample standard deviation of five months. Assume that the underlying population distribution is normal. + Part (a) + Part (b) + Part (c) +

Write your answers as a fraction 3) Round your answer to the three decimal places b} 2 attachments [6A] Consider the following position function: 3(t) = % where s is measured in metres and'tr is in seconds. a] Find the average velocity over the time interval 2 11 t E 5 b) Find the velocity at exactly 6 seconds. Show your work! V If you have

help with the fill in the blanks and response questions. Results that are unlikely and therefore unexpected if we assume that the null hypothesis is true are called statistically significant. APPLICATION 2. ESTIMATION The biologist wants to estimate the average area used by wolf packs in North America. The researcher attaches tracking devices to

8.2.3 Refer to the previous exercise about the study of different filv Intervention programs. 1. State the appropriate null and alternative hypotheses in words. 2. Explain why it would be okay to use the theory-based method to find a p-value for this study. 3. Use an appropriate applet (for example, the Multiple Proportions applet) to find and

Questions 20 and 21 are related to the following In a hypothesis test the objective is to test if the population mean is greater than 620. The P-value for the test, using the standard normal (z) distribution, is reported to be 0.0392. 20 What is the value of the test statistic? a 1.70 b 1.76 1.82 1.89 21 In the previous hypothesis test the sample

Let r be the reciprocal of n. Find the instantaneous rate of change of r wrt n and relative rate of change of r per change in r when n is: a) 4 and b) 10 Pls show solutions using derivatives Correct answers are a.) -1/4 and b.) -1/100

A quiz consists of 7 true-or-false questions. In how many ways can a student answer the quiz?

6. (03.02 HC) A graph is defined by the equation x2 -v2xy +3y2 = 23 dy Part A: Find dx (5 points) V2, 3). Part B: Find the equation of the tangent line and the normal line at the point (5 points) i U Font Family AAA V F WIN- YJ 7. (03.03 HC) No calculator is allowed for this question. A function h is dependent on x and is differentiable for all

16. (K. p. 315-318) What are the two ways you can do a one-sample statistical test for a correlation that are described in the book? When do you use each of these two procedures

hello expert, I need help in this question , thank you , I will pick up your answer if you do good, thank you very much Question 2 (12 marks) (a) A school is reviewing time taken (minutes) to finish an admission test by applicant. Below is the data of random sample 1: 49 35 36 38 33 42 Below is the summary statistics of random sample 2: Sample

In a certain beverage manufacturer's factory, an automated soft-drink filling machine is to fill 2-litre bottles with product, the amount of soft-drink slightly varying from one 2-litre bottle to the next in according with a Normal probability model with a mean of =1.89=1.89 litres and a standard deviation of =0.05=0.05 litres. You are to randomly

ANSWER THE FOLLOWING 4 QUESTIONS A B C D 2 1 2 2 3 2 3 3 3 1 Which of the diagrams shown here best represents the following argument: "All accountants are licensed by the province. And Anita is an accountant. So Anita is licensed by the province." Diagram A Diagram B Diagram C O Diagram DAEJEBEECEEDE Which of the diagrams shown here best

It is claimed that the mean height for Iowa women is different than the national average, which is 64.4". A SRS of 20 Iowa women had an average height of 66" and standard deviation of 2.8". Let 0 be the test statistic for testing the implied hypotheses. Consider the three tests... Test 1: Reject 0 if (0 2.1) is observed. Test 2: Reject 0 if (0

Chapter 7 1. Sketch the region bounded by the graphs of y = xe"* + 2, y =0, x =0 and x = 1. Then determine the area between the two curves. Exact answer. No decimals. 2. Sketch the region bounded by the graphs of f (x) - x, f(x) = 4x -x2. Then determine the volume when the region is revolved about the y - axis. Exact answer. No decimals. 3. Sketch

Question Completion Status: A Moving to the next question prevents changes to this answer. Question 3 Which of the following is ture? O If we have good sample statistics we can determine the values of population parameters with exactness and certainty O When estimates of population parameters are based on sample statistics we cannot be sure they