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Mathematics Questions and Answers July 09, 2022

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Which graph is NOT appropriate for primary-level children? Question 17 options: a) Pie graphs b) Picture graphs c) Bar graphs d) Histograms

Ben (5'9", 164 lbs, 24 yrs old) jogged a mile in 9:15 with an ending HR of 158 (Chpt 07). Using the 1-mile jogging equation for students, what is his estimated VO2max

How would I access to PSY7864 " Unit6Assignment1 - DATA ANALYSIS AND APPLICATION"?

1) Why we recommend to calculate the correlation coefficient factor before applying the Regression Analysis? if you found the r as 0.25, what is your next interpret on next action? 2) You know that adjusted r2is one the primary outputs foreach Regression model.Suppose that we developed two different models (x is Skill and Y is team performance)

You wish to test the following claim (Ha) at a significance level of=0.002. Ho:=50.1 Ha:50.1 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of sizen=60with meanM=53. and a standard deviation ofSD=17.9 What is the test statistic for this sample? (Report answer accurate to three

Suppose that E and F are two events and that P(E and F)=0.2 and P(E)=0.4. what is P(F | E).

Show that if n is an integer, then either n^2 or n^2 - 1 is divisible by 4.

The two graphical techniques usually used to present nominal data are

Prove or disprove that an 88 board with any one square removed can be tiled with pieces consisting of three squares in an L-shape.

Which of the following best describes data analytics? Question 5 options: A) examining big data, removing excess "noise," and organizing the data to draw conclusions B) examining big data and drawing conclusions C) examining raw data and drawing conclusions D) examining data and removing excess "noise" to draw conclusions

The size of the left upper chamber of the heart is one measure of cardiovascular health. When the upper left chamber is enlarged, the risk of heart problems is increased. The paper "Left Atrial Size Increases with Body Mass Index in Children" (International Journal of Cardiology [2009]:1-7) described a study in which the left atrial size was

Often, news stories that are reported as startling \"one-in-a-million" coincidences are actually, upon closer examination, not rare events and can even be expected to occur. A few years ago an elementary school in New York state reported that its incoming kindergarten class contained ve sets of twins. This, of course, was reported throughout the
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Hi I'm working on some research questions and I'm looking of the appropriate statistical analysis to be employed to determine the significance. The research questions focus on the following: a relationship question involving GPA and GRE scores a relationship question involving gender, GPA and GRE scores an effect research question involving gender

Proportion Problem. Each year Delta Dental does a survey of parents concerning the tradition of the Tooth Fairy.A random sample of 1,058 parents were asked about how much money they leave for a tooth and questions concerning how their child responded to the concept of the Tooth Fairy.In one question, 508 parents indicated that their child saved

Suppose that X1, . . . , Xn has a Weibull distribution with pdf f(x; ) = 2x 2 e x 2/2 , x 0, where > 0. (a). Prove that this distribution belongs to the regular exponential family. (b). Give a complete sufficient statistic for . (c). One can show that EX 2 = 2 . Find a uniformly minimum variance unbiased estimator for 2 .

You run a regression analysis on a bivariate set of data (n=69). You obtain the regression equation y=2.898x+25.352 with a correlation coefficient ofr=0.998(which is significant at=0.01). You want to predict what value (on average) for the explanatory variable will give you a value of 130 on the response variable. What is the predicted explanatory

Pls include the graphs in your answers that is the essence of me asking for help The examination scores (out 0 68 T 91 66 92 58 79 94 81 60 73 51 44 58 71 76 500 400 400 200 100 S AREPP PP & Driver Age a) Identify the variable in the graph. What type and sub-type of variable is it? b) Identify the type of graph being used in this situation. s this
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Please Answer These Questions correctly! If we have 3 datasets in which dataset 1 has 10 observations, dataset 2 has 20 observations, and dataset 3 has 30 observations, what will be a true statement when the mean for all three datasets is equal? * O Dataset 1 has the smallest variance O Dataset 3 has the maximum variance O All datasets have the
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The data for a correlation and Regression analysis produced the following results. Y = 3.5x + 76, n = 12, r = 0.86,andy y .The analysis is done at the 5% level of significance. Choose the most appropriate option Question options: The proportion of the variation in the dependent variable that is attributable to the independent variable is not 0.74

a survey was given to a random sample of 1650 residents of a town to determine whether they support a new plan to raise taxes in order to increase education spending. of those surveyed, 1188 respondents said they were in favor of the plan. determine a 95% confidence interval for the proportion of people who favor the tax plan, rounding values to

Create a histogram of the SalePrice vector with an appropriate custom header, xlabel, and colored bars. Question 1 options: None are correct hist(d$SalePrice, main="Sale Price", xlab="Histogram of SalePrice", col="blue") hist(d$SalePrice, main="Histogram of SalePrice", xlab="Unit Price (GBP)", col="blue") hist(d$SalePrice, main="Histogram of

Using the diagram below draw the profile of : the amount at stake and opportunity and risk throughout a typical project life cycle. \f
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10. Use your graphing calculator to find the equation of the parabola y = ax2 + bx + c that passes through the points. 60 (3, 58) 50 40 30 (2, 33) 201 (1. 16) 10 - 10 10 11. An object moving vertically is at the given heights at the specified times. Use your graphing calculator to find the position equation s = = at2 + vit + so S= Att = 1 second,
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Suppose Mike tosses 3 heads on the first toss. What is the probability of doing worse than that on the second toss?

Decide if the given statement is true or false. If it is false, give the reason. {5} is an element of {{5}, {6}, {7}} A. The statement is false; an element cannot be a subset. B. The statement is true; {5} is a subset of the set. C. The statement is false; a set cannot be an element of a set. D. The statement is true; {5} is an element of the

A cleaning company claims that it can clean an entire house in less than 2 hours. A sample of n = 36 houses is taken and the sample mean is found to be 1.97 hours and the sample standard deviation is found to be 0.1hour. If you will conduct a test of hypothesis, what is the appropriate conclusion? reject the null hypothesis or do not reject the

Accuracy in taking orders at a drive-through window is important for fast-food chains. periodically, QSR Magazine publishes "The drive-thru performance study: order Accuracy" that measures the percentage of orders that are filled correctly. in a recent month, the percentage of orders filled correctly at Burger King was approximately 90%. Suppose

A rifle is used to shoot twice at a target, using identical cartridges. The first time, the rifle is aimed parallel to the ground and directly at the center of the bull's-eye. The bullet strikes the target at a distance of Ha below the center, however. The second time, the rifle is similarly aimed, but from twice the distance from the target. This

A normal distribution has a mean of 54 and a standard deviation of 6. What is the probability of randomly selecting a score less than X=51? p=? What is the probability of selecting a random sample of n=4 scores with a mean less than M=51? p=? What is the probability of selecting a random sample of n=36 scores with a mean less than M=51? P=?

Which of these creates a valid boxplot of the GrLivArea vector? Question 6 options: plot(d$GrLivArea, main="Boxplot of GrLivArea") boxplot(d$GrLivArea, main="Boxplot of GrLivArea") boxplot(~GrLivArea, data=d, main="Boxplot of GrLivArea") boxplot(GrLivArea, data=d, main="Boxplot of GrLivArea")

3. The average population of salamanders in northern Pennsylvania in relation to time in years is shown in the table. Years Salamander Population 3 18,271 12 17,884 20 17,540 How many fewer salamanders will live in northern Pennsylvania after 38 years compared to their initial population value? There will be 1,634 fewer salamanders O There will be
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What steps do you use to solve an equation?Give an example, and explain your answer.

Please use a PMT tableN=PV =FV=PMT=I/Y=P/Y=C/Y= Page 5 of 8 Question 5 (3 points) Listen A $9,000 bond pays interest at 4.3% compounded semi-annually and is redeemable in 7 years. The bond is purchased at 97.82. Calculate the yield rate. Round your final answer to 2 decimal places. Remember to show your work. . Formula Sheet + . . . Paragraph B UV
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The Customer Service Center in a large New York department store has determined that the amount of time spent with a customer about a complaint is normally distributed, with a mean of10.3minutes and a standard deviation of2.4minutes. What is the probability that for a randomly chosen customer with a complaint, the amount of time spent resolving

Through a telephone survey, a low-interest bank credit card is offered to 400 households. The responses are as tabled. Through a telephone survey, a low-interest bank credit card is offered to 400 households. The responses are as tabled. ? \f
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Need help with this problem. Let X and Y be independent, exponential random variables with mean 1/2. (a) Find M X_y(t), the moment generating function of X Y. (b) Find the joint density of U = X and V = X Y. (c) Find the marginal density of V. (d) Compute E'[X Y] using the pdf for V. (e) Compute E[X Y] using the joint pdf. (f) Compute E' [X Y]
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A person with tuberculosis is given a chest x-ray. Four tuberculosis x-ray specialists examine each x-ray independently. If each specialist can detect tuberculosis 7878% of the time when it is present, what is the probability that at least 1 of the specialists will detect tuberculosis in this person? Question content area bottom Part 1 P(at least

Hotel Ratings are usually on a scale from 0 to 5 Stars, what is this level of measurement called ? 1.interval 2.nominal 3.ordinal 4.ratio

The heights of pecan trees are normally distributed with a mean of 10 feet and a standard deviation of 2 feet. 1.What is the probability that a randomly selected pecan tree is between 9 and 12 feettall? (Round the answer to 4 decimal places) 2.Find the 75th percentile of the pecan tree height distribution. (Round the answer to 2decimal places)

95% specificity means that of the people who do not have strep, 95% of them will accurately test negative. This means that 5% of the people who do not have strep will test positive for it; these are called false positives. Let's consider a random sample of 30 people who do not have strep and are tested with this rapid strep test. Let Y be the

Index items are typically heterogeneous and not necessarily correlated with each other. Group of answer choices True False

1.Define the terms as they apply to statistical studies: sample, raw data, sample statistic, confidence interval, margin of error, census. Sample Raw Data Sample Statistic Confidence interval Margin of error Census

What is the value of b in this linear system? A + b + c = 9 2a - 3b + 2c = 3 A + b - 2c = -3

content area top Part 1 Fill in the blank. The claim being assessed in a hypothesis test is cRejecting the null hypothesis when the null hypothesis is true is called the significance level. power. a Type I Error. a Type II Error. alled _____________. Question content area bottom Part 1 The claim being assessed in a hypothesis test is called power.

I need to know how do I plug in this word problem? A theater is presenting a program on drinking and driving for students and their parents or other responsible adults. The proceeds will be donated to a local alcohol information center. Admission is $14.00 for adults and $7.00 for students.However, this situation has twoconstraints: The theater

A credit score is used by credit agencies(such as mortgage companies andbanks) to assess the creditworthiness of individuals. Values range from 300 to850, with a credit score over 700 considered to be a quality credit risk. According to asurvey, the mean credit score is 706.9. A credit analyst wondered whetherhigh-income individuals(incomes in

Rory made 7 of her last 10 free throw shots. a) Will she make the next free throw shot she takes? b) What is the probability that she makes the next shot? c) What is the probability that she makes the next 5 shots?

. A grocery store manager is interested in testing the claim that banana is the favorite fruit for more than 50% of the adults. The manager conducted a survey on a random sample of 100 adults. The survey showed that 56 adults in the sample chose banana as his/her favorite fruit. Assume the manager wants to use a 0.05 significance level to test the

Do the measures and shape represent what you would expect based on randomly determined values? Why or why not? Include the data set of the 30 random values and your output in your response. Provide references (Refer to Chapter 3 Review: Supplementary Exercise 62 in the Chapter 3topic Resourcesin Essentials of Modern Business Statistics With

The number of meters a student swam this week are listed. 400, 550, 650, 650, 900, 1100 What is the appropriate measure of variability for the data shown, and what is its value? The mean is the best measure of variability and equals about 675. The median is the best measure of variability and equals 650. The range is the best measure of

What is the probability that less than 5 people receive false negatives? [

To decrease drunk drivingduring New Year's Eve, police set up checkpoints. Assume that 2% ofall drivers have blood alcohol level above the legal limit. In a sample of 200 drivers stopped for checking, compute the following probabilities: a) None have a blood alcohol level higher than the legal limit. b) At least 2 have a blood alcohol level higher

In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer56out of a random sample of84guests did, in fact, catch northern pike weighing over 20 pounds. Does this indicate that the population proportion of guests who catch pike over 20 pounds is different from 75% (either

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5. (5 pts) If f and g are the functions whose graphs are shown, let, u(x) = f(x)g(x), v(x) = g(f(x)) and w(x) = f (x3). Find each derivative, if it exists. If it does not exist, explain why. a) u'(2) y 6 2 4 6 8 X b) v'(2) y 8 2. 0 2 4 6 8 X c) w'(2)
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Using the margin of error from the previous question, compute the 95% confidence interval for a sample mean of 10.

The power curve for a two tailed single mean hypothesis test depicts the probability that you reject the null hypothesis for a given value of the true mean, 1 (shown on right).Given the null hypothesis (shown on right), sample size n (shown on right), and level of significance (shown on right), what is the P(Reject Ho / x = 1).In other words, what

*this is time sensitive, i'm more worried about the correct answer rather than the explanations! "When a melon is good, I can tell by the smell (before I buy it) correctly 3 times out of 4. But when it's bad, I can tell 9 times out of 10 without buying it. What is the percentage of bad melons that I will buy during a season when 4 out of 5 of the

I need some assistance with evaluating the functions. I don't know where i keep making an error. I follow the steps as indicated however near the end of thei get stuck. Can you please break this down. \f
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A group of 894 women each 70 through 79 had their height and weight measured. The main height is 159 cm with a standard deviation of 5 cm and the main weight is 65.9 kg with a standard deviation of 12.7 kg. Both sets of data off fairly normal. a) suppose you were asked for a range of typical heights and weights for this population of women what

Calculate a t-test for the following scenario. An engineer is designing a stationary parts bin at a work table and considers using an established functional grip reach of 29.55 inches ta ken from the overall population mean, which was published in a textbook. However. the individuals who work in the facility represent a demographic that the
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Problem 13: Find the area enclosed byr= 3 + 2 sin.Answer must be in exact form.

10. Consider functions f : R2 > R2 from the Euclidean plane to itself, given by the following rules of assignment. Which are idempotent? Justify your answer. If the functions depend on a parameter (9, oz, )3), then be clear how the answer depends on the parameter. (a) ($1,122) I> (2561, %$2) (e) ($1,122) I> (552,371) (b) (1131:1172) '> (011171:
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2. Using your normalcdf (LB, UB, Mean, SD) function to answer the following questions. Round to the tenth place. a) What percent of female adults are less than 6 feet (72 inches)? b) What percent of female adults are at least 5 feet (60 inches)? c) What percent of female adult heights are between 60 inches and 72 inches? 3. Practicality makes it
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Problem 4. (1 point) Consider the function f(a) = a - 98x2 + 2, -6
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Please solve this. 17 (i-v) and 18 (i-v). Q11 Meglma has two boxeeI and 11. Box I contains 3 red and 6 black balls. Box 11 contains 5 red and 'N' black balls. One of the two boxes, box I and box II is selected by her 'iend Radha at random, and then Radha draws a ball at tandem. The ball draw is found to be red. Based on the above iofonuation
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I have a question regarding how to derive a formula based on another formula. The question is stated below: -Explain how to derive the formula Sin(theta)= bc - ad / ||u|| * ||v|| -Using the angle difference formula for sin, which is Sin(A-B) = sinAcosB - cosAsinB u and v are both vectors that start at point (0,0) and vector u ends at points (a, b)
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A jar contains 12 red marbles, 6 blue marbles and 7 green marbles. Each time you draw out a marble, you record the outcome and put it back in the jar before making another draw .Select the choice that is closest to the answer. Your friend drew three marbles, and told you that the second draw was a red marble. Given this information, what is the

Which of the following trend models displays a steady increase or decrease in the value of the variables over the period of time? option A Linear option B Polynomial option C Power option D Exponential

In a survey, 21 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $3. Construct a confidence interval at a 90% confidence level. please explain how to input this information on TI-84

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A population of 20 exams has a standard deviation of 3. The sum of the squared deviations from the mean is

Suppose the following estimated regression equation was determined to predict salary based on years of experience. Estimated Salary=29,608.40+2632.98(Years of Experience) What is the estimated salary for an employee with18 18years of experience?

The standard deviation of the data set for bond mutual funds is 0.669. The standard deviation of the data set for stock mutual funds is 0.903. Based only on the standard deviation, have more spread

During office hours, the average student waits 6 minutes for their question to be answered. If 12 students arrive per hour, how many students are waiting in line (on average)

Examine the following language sample. Calculate the MLU for this sample. May be a decimal, you have access to calculators. Baby gonna go night-night. Baby's sweepy [sleepy]. Don't sleep! Wake up! Drink milk baby. Baby's milk allgone. Need more milk

A coffee-dispensing machine is supposed to deliver 8 ounces of liquid into each paper cup, but a consumer believes that the actual mean amount is less. The consumer obtained a sample of 16 cups of the dispensed liquid with sample mean of 7.75 ounces and sample variance of 0.81 ounces. If the dispensed liquid delivered per cup is normally

It is very important to fight the urge to go back and tweak your model to decrease the generalization error with your test set. You will then begin to "fit" your model to your specific test set. Question 21 options: True False

in a 2x2 contingency table, which of the following is true? a) effect sizes for difference in proportions near .50 and near .10 would depend on how much power is needed? b) effect sizes for differences in proportions near .50 are larger than those near .10? c) effect sizes for differences in proportions near .50 are the same as those near .10? d)

Please make up 12 sale values of your choice (numbers between 100 and 200) and enter these values in the "Actual Sale" column. Complete the remaining columns table below using the indicated forecasting Method. Compute MADs, MSEs, and MAPEs. Question:Which smoothing method is the best? Why? With your own number, just duplicate what I did in the

A supplier delivers an order for 20 electric toothbrushes to a store. By accident, three of the electric toothbrushes are defective. What is the probability that the first two electric toothbrushes sold are defective? Multiple Choice :27 O 3/17 or 0.176 O 6/380 or 0.01579 3/20 or 0.15 1/4 or 0.25 Prev 15 of 20 Next >

Trea Turner of the Los Angeles Dodgers had the highest batting average for the 2021 Major League Baseball season. His average was 0.430. So, the likelihood of his getting a hit is 0.430 for each time he bats. Assume he has three times at bat tonight in the Dodger- Giants game. Required: a. This is an example of what type of probability? Type of

Thanks for the help Answer the following questions. Show all your work. When you use the calculator mention its use. 1. The following is a sample of unemployment rates (in percentage points) in the US sampled from the period 1990 2004; 4.2,4.7,5.4,5.8,4.9 a) Compute the sample mean, f, and the sample standard deviation, 3, using the formulas
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1- Given the following distribution: Outcome Value of Random Variable Probability A 1 .4 B 2 .3 C 3 .2 D 4 . 1 The expected value is 3. A) True B) False 2- A new young executive is perplexed at the number of interruptions that occur due to employee relations. She has decided to track the number of interruptions that occur during each hour of her

A psychologist obtains a random sample of 20 mothers in the first trimester of their pregnancy. The mothers are asked to play Mozart in the house at least 30 minutes each day until they give birth. After 5years, the child is administered an IQ test. It is known that IQs are normally distributed with a mean of 100. If the IQs of the 20 children in

Several years ago, 40% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1, 015 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1, 015 surveyed, 461 indicated that they were satisfied. Construct

Your best friend is organizing a birthday party for her twins - Amy and Steve - and she put you in charge of ordering the cakes. The bakery offers several types of cakes - a Cheesecake, Sacher Cake, a Chiffon Cake, a Coconut Cake and a Carrot Cake. How many different ways can you order the cakes, assuming that... a) ... both twins enjoy all the 5

Graph the following inequality. X2 - 5 Use the graphing tool to graph the inequality. Click to enlarge graph
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A curve has equation y= 6x^3 + ax^2 + bx - 12. It passes through the point (1,-4). At the point where it crosses the y-axis, its gradient is -8. a) Find the value of a and the value of b. b) Find the coordinates of the other point where its gradient is -8.

A random sample of 21 items is drawn from a population whose standard deviation is unknown. The sample mean isx x= 750 and the sample standard deviation is s = 10. UseAppendix Dto find the values of Student's t . (a) Construct an interval estimate of with 98% confidence. (Round your answers to 3 decimal places.) The 98% confidence interval is

Royal Gold, Inc. (RGLD) NasdaqGS - NasdaqGS Real Time Price. Currency in USD 125.37 +1.96 (+1.59%) 125.00 -0.37 (-0.30%) At close: 04:00PM EDT After hours: 05:07PM EDT @ Indicators @ Comparison $ Events ( Date Range 10 50 1M 3M 6M YTD 1Y 2Y 5Y Max RGLD 125.37 Interval 1Ww ww Line > > Draw yahoo!finance 150.00 140.00 130.00 125.3 120.00 110.00
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help please Find the area of the shaded region under the standard normal curve. If convenient, use technology to nd the area. The area of the shaded region is D. (Round to four decimal places as needed.) -2.03 D
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5. Know how to state null hypothesis and alternative hypothesis for an analysis of variance (ANOVA)

A recent article in a college newspaper stated that college students get an average of 6.8 hrs of sleep each night. A student who was skeptical about this value decided to conduct a survey by randomly sampling 29 students. On average, the sampled students slept 5.6 hours per night. Identify which value represents the sample mean and which value

Question 1. (1) Write the following statement using logic symbols and quantifiers if necessary. Let A, B be two sets. Any element of a set A which is not an element of a complement of AN B in A belongs to a set B. (2) Decide if the above statement is TRUE or FALSE. If it is true, then prove it; otherwise, find a counterexample. Question 2. Assume
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A researcher randomly sampled 50 graduates of an MBA program and recorded data concerning their starting salaries. Of primary interest to the researcher was the effect of gender on starting salaries. The summary results are given below: Female MBA Graduates: Sample mean = $52500, Population standard deviation = 12000, Sample size = 25 Male MBA

Recall that { xt } is a martingale if E [ xn + h Recall that {x,} is a martingale if E[x,,+h Ix" ,xn_1, - - ' ]=x,, for all n and for all lead times I: >0. Actually, to establish that {x,} is a martingale, one simply needs to prove the above formula for h =1 since it can be shown that if it holds for h = 1 it must hold for all h >0. 1) Suppose x,
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help with all 4 Needles Exercises 2.3.15 and 2.3.16 refer to the needle data. 2.3.15 Consider a manufacturing process that is producing hypodermic needles that will be used for blood donations. These needles need to have a diameter of 1.65 mm-too big and they would hurt the donor (even more than usual), too small and they would rupture the red
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A researcher computes a perfect negative correlation, in which each data point falls exactly on the regression line. In this example, the value of the standard error of estimate will be ______. a. equal to 0 b. there is not enough information to answer this question c. less than 0 d. greater than 0

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