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Mathematics Questions and Answers March 12, 2022

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Please answer question 12 with the attached information Use the following to answer questions 10-12: Student Test Grade Study Time (hours/wk) 1 88 6 2 84 3 76 5 4 73 4 5 99 69 6 7 66 7 79 g g 66 10 89 11 96 12 62 13 66 14 74 15 75 16 96 17 98 18 62 19 87 20 9912) What is the correct scatter plot display for the relationship between the test grade
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Predict the Market value of a house with 1000 square feet, a grade of 1, and an assessed value of 30. The regression equation is Market = 3.49 + 0.0474 SqFt 0.000016 (SqFt)**2 + 3.16 Grade + 0.235 Assessed Predictor Coef SE Coef T P Constant 3.490 4.656 0.75 0.457 SqFt 0.047388 0.008069 5.87 0.000 (SqFt)**2 0.00001635 0.00000364 4.49 0.000 Grade
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The Mars Candy Company claims that 13% of its M&M candies are brown, but a simple random sample of 100 M&M candies has only 8 brown M&M candies. Use the sample data to construct a 98% condence interval estimate of the proportion of brown M&M candies. Question 15 options: P 0.017
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A randomA random sample of 113 felons convicted of nonviolent crimes in a state prison system completed a program designed to improve their employment possibilities before being released on parole. 58 eventually become repeat offenders. Is the recidivism rate significantly different from the rate of all offenders in that state (57%)? Summarize

Questions 8-10 refer to the following information: Let D be a dummy variable, while X and Y are continuous variables. You have the following regression model: Y=Bo+BIX+B2D+ B;XD+e. 8. If D=0, then the effect of a one unit increase of X on the expected value of Y is: A) B1+83 B) B2 C) B1 D) B2+83 E) B3 9. When X=5 and D=1, then which of the
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When conducting a residual analysis. which plot would Iyou look at to determine if the normal assumption is satised? C) Scatter plot of That vs. QM X C) Stern-and-Leaf Plot of the Zresiduals C) Scatter Plot of Residuals us That C) Scatter Plot of Residuals v5 QM X
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Bob has two coins, A and B , in front of him. The probability of Heads at each toss is p=0.5 for coin A and q=0.9 for coin B . Bob chooses one of the two coins at random (both choices are equally likely). He then continues with 5 tosses of the chosen coin; these tosses are conditionally independent given the choice of the coin. Let: Hi: the event

In a survey of 2468 adults in a recent year, 1235 say they have made a New Year's resolution. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. The 90% confidence interval for the population proportion p is (Round to three decimal places as needed.)
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Translate the sentence into an inequality. Twice the difference of a number and 4is at least -23

Need help with questions. Thank you!! Modules 9 and 10 Questions-Submit answers via email to mecartel Cohio.edu according to above instructions: (There are 40 questions to be answered for Modules 9 and 10) The following 13 questions (Q1 to (13) are based on the following example. Patients recovering from an appendix operation normally spend an
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A researcher conducted a study to determine if a new treatment reduces SBP in hypertensive women. The researcher found that the mean SBP in the treatment group was 12 mm Hg lower than in the placebo group. She decides that this reduction would be very meaningful for patient care. With a sample size of N=10 in each group the p-value was 0.08. Which

You are doing a study on sleep deprivation on logical thinking. You take a sample of n = 25 individuals and deprive of them sleep so that they only get 4 hours of sleep for two nights. You then have them each solve a puzzle, and find that the mean time to solve the puzzle is M = 30 minutes. You know that for the population, the mean time to solve

Use the given confidence interval to find the margin of error and the sample proportion. (0.711,0.737) E=(integer or adecimal.) p= (integer or adecimal.)

3. A. For triangle ABC, a = 13, b = 14 and c = 15, using formulas involving s (semi-perimeter) find (1)the area, (2)tb (angle bisector) to side b.

Any math tutor please........................................................

Approximately 8% of all people have blue eyes. A random sample of 20 people is selected, find . Round to one decimal place. It is known that 50% of adult workers have a high school diploma. If a random sample of 8 adult workers is selected, what is the probability that less than 6 of them have a high school diploma? (That is, what is P(X < 6)

+ .edu/courses/43878/quizzes/328137/take Prof Rea's Exam Question 7. Soon to be new parents want to estimate the mean difference between a mother's due date and her delivery date. They are wondering if their baby will be born much earlier or later than they expect and want to be prepared. They survey a random sample of 16 mothers for their due
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According to the historical data, the life expectancy in France is less than the life expectancy in Germany. A new study has been made to see whether this has changed. Records of 240 individuals from France who died recently are selected at random. The 240 individuals lived a mean of 78.1 years with a standard deviation of 6.6 years. Records of
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A random sample of 40 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.02 5.02 hours, with a standard deviation of 2.48 2.48 hours. A random sample of 40 40 adults with children under the age of 18 results in a mean daily leisure time of 4.09 4.09 hours, with a standard deviation of 1.55 1.55 hours.

2 Create a regression predicting whether or not a restaurant is McDonalds or Subway based on calories, sodium, and protein. (McDonalds should be 1, Subway 0) Hint: make sure you know how McDonalds is spelled in the dataset. - Assign the model coefficients to Q2. Your output should look something like this: ``` (Intercept) calories sodium protein

PROBLEM A.The average daily temperature of a town influences the consumption of electricity. Temperature 2 5 7 10 12 15 Electricity consumption 9 15 19 25 29 35 1-Find the regression line of best fit that would determine the electricity consumption based on temperature. B.The following data shows the number of weekly clients who visited a certain

An object with weight W is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle t with the plane, then the magnitude of the force is F =( W)/( sin( t) + cos( t)) , where is a constant called the coefficient of friction. Let W = 50 lb and = .6 . (a) Find the rate of change of F with

Why do we naturally tend to trust some strangers more than others? One group of researchers decided to study the relationship between eye color and trustworthiness. In their experiment the researchers took photographs of80 students(20 maleswith brown eyes,20 maleswith blue eyes,20 femaleswith brown eyes, and20 femaleswith blue eyes), each seated

Three different methods for assembling a product were proposed by an industrial engineer. To investigate the number of units assembled correctly with each method, 30 employees were randomly selected and randomly assigned to the three proposed methods in such a way that each method was used by 10 workers. The number of units assembled correctly was
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The mean yearly precipitation in Toledo, Ohio is 99 inches. The population standard deviation is 19.08 inches and the yearly precipitation is normally distributed. What is the probability that the percipitation of a random year will be less than 129 inches? Step 1: Determine the population mean and population standard deviation #: Step 2:
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Vincent randomly selected a bag of M&Ms from a randomly selected gas station as he was driving down the interstate. Being bored while riding in the car, he decided to evaluate his green M&Ms. From this simple random sample, there were 19 green M&Ms with a sample mean weight of 0.8635 grams and a sample standard deviation of 0.0570 grams. Use a
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A survey examined public opinion about the effectiveness of the criminal justice system in Baltimore (based on a scale of 1 - 10, with a response of 1 being the least favorable and a response of 10 being the most favorable). The overall view of the criminal justice system was measured in a national study and was positive - an average of 6.5 out of
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An archaeologist draws a stratigraphic profile of a site with three clearly defined strata. In her drawing, level A comprises the bottom layer, with level B resting on top of level A. Level C, a pit, starts at the top of level B and extends down into level A. Is level C younger or older than level B, and why do you think so? A. Level C is younger

Truck Mileage Truck Mileage (MPG) Weight (Tons) 1 24.5 4.97 2 21.25 4.45 3 28.5 4.34 4 8 7.69 5 27 4.56 6 12.75 6.24 7 14.5 6.49 Source: J. Yanowitz, Ph.D. thesis, Colorado School of Mines For predicting miles per gallon(m) using weight (w), do the calculations for least squares regression line. Put together a 95% confidence interval for the

Solve the attached: (a) Consider the quadric surface 31 given by 22 = 2:2 + y" + 2. Which of the following is a graph of this surface? N0 EXPLANATION NEEDED. ii. (b) Consider a different surface 32 given by z = '93 23y 1. Find a normal vector to 52 at the point (1,1,2) on 32. (c) Consider the curve C = 31 F1 32 given by intersection of these two
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9the tangent line to the graph y= cuberoot(x y = c u b e r o o t x ) at the point(8,24) has the form y=mx+b. what is m+b? Graph the function f(x) passes through (0,3). The tangent line at this point also passes through the point (3,9). What is f'(0)? The function f ( x ) = a x 3 + b x satisfies f' (0) = 1 and f'' (1) = 12 What is a + b ? In order

A comparative income statement is given below for Mckenzie Sales, Limited, of Toronto: Mckenzie Sales, Limited Comparative Income Statement This Year Last Year Sales $ 7, 310,000 $ 5,555, 600 Cost of goods sold 4, 750, 000 3, 514, 500 Gross margin 2, 560, 090 2, 041, 100 Selling and administrative expenses : Selling expenses 1, 392, 000 1, 077,
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Is there a correlation between mean course grade and mean attendance in data set 7176?What is the equation of the regression line?What is the best prediction for a mean attendance of 80%? Can you write each step detail, so I can learn about how to do it. Thank you so much. \f\f
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If the level of significance of a hypothesis test is raised from 1% to 5%, the probability of a Type II error will ____________________ Question 6 options: a) increase. b) not change. c) None of the options d) decrease. e) also increase from 1% to 5%

A retrospective analysis of patients treated with dupilumab for AD (atopic dermititis) between January 2017 and August 2019 was undertaken. Data were collected on demographics, incidence and type of ocular disease features, natural history and treatment. From this sample the incidence rate of conjunctivitiis was 32.1% (9/28) were diagnosed with

From 88 of its restaurants, Noodles & Company managers collected data on per-person sales and the percent of sales due to "potstickers" (a popular food item). Both numerical variables failed tests for normality, so they tried a chi-square test. Each variable was converted into ordinal categories (low, medium, high) using cutoff points that
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A study that looked at beverage consumption used sample sizes that were much smaller than previous national surveys. One part of this study compared 20 children who were 7 to 10 years old with 5 who were 11 to 13. The younger children consumed an average of 8.5 oz of sweetened drinks per day while the older ones averaged 14.3 oz. The standard

2PM Sun May 19 ... webassign.net 78% In business, percents are frequently used to represent the portion of observations falling within classes of a frequency distribution. A relative frequency distribution expresses the distribution as percents. To convert a frequency distribution to a relative frequency distribution, divide each of the class
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solve the question According to the journal Chemical Engineering, an important property of a fiber is its water absorbency. A random sample of 20 pieces of cotton fiber was taken and the absorbency on each piece was measured. The following are the absorbency values: 18.71 21.41 20.72 21.81 19.29 22.43 20.17 23.71 19.44 20.50 18.92 20.33 23.00
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A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 12 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 13.6 14.0 24.5 24.6 22.9 37.7 14.6 14.5 21.5 21.0 17.8 21.4

Final Exam Bonus Questions 1. Multiple Sclerosis (MS) is hard enough to manage on its own; however, in recent years MS has been linked to depression. Whether it be due to the disease itself or a side effect of drug treatments is still unclear, but the link is undeniable. Suppose in DC 25% were diagnosed with both MS and depression, and 60% had

Need help with questions. Thank you!! Q12: !Jsing the 1989 base as a base, the price index for computers is now 125. What does this index number mean? A. price of computers has decreased 25% since 1989 B. price of computers has increased 125% since 1989 C. price of computers has increased 25% since 1989 D. none of the above three answers are
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I need help with the following problem, specifically problem 2. I will have all the details of the exercise below. It is from the Quantitative Social Science book by Imai and uses R for statistical analysis. I figured out problem 1, but an stuck on problem 2. "In this exercise, we use the rules of probability to detect election by examining voting

21. Of the last 100 customers entering Apple store, 20 have purchasedsome item. If the classical approach for assigning probabilities is used, the probability that any two of the next three customers will purchase an item is Select one: a. 67% b. 9.6% c. 20% d. 50%

Again here is the information about the characteristics of a basketball team's season: 60% of all the games were at-home games. Denote this by H (the remaining were away games). 25% of all games were wins . Denote this by W (the remaining were losses ). 20% of all games were at-home wins. If the team won a game, how likely is it that this was a

?33 When purchasing bulk orders of batteries, a toy manufacturer uses this acceptance sampling plan: Randomly select and test 51 batteries and determine whether each is within specifications. The entire shipment is accepted if at most 2 batteries do not meet specifications. A shipment contains 6000 batteries, and 1% of them do not meet
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These are multiple-choice questions regarding probability. Thank you for your help! A. Two cards are drawn without replacement from a deck of 52 cards. What is the probability that the first card is a face card and the second card is a jack? a) 3/17 b) 1/17 c) 2/13 d) 1/13 B. If the odds that a four would come up 8 times in 50 rolls of a fair die,

Find the values of the indicated functions Given tan = 1.112 find csc and cot .

An important part of determining how to organize content to teach is to first determine what kind of knowledge students will be expected to learn. a. True b. False

A national restaurant chain wishes to test whether the mean amount of time a table is occupied by one party who begin the meal after 6:00 pm differs from 83 minutes, the mean three years ago. The times of 50 dinner parties will be measured. The setup of the null and alternative hypotheses for the relevant test of hypotheses is Group of answer
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what is the difference between a probability statement and a conditional probability statement?

Which of the following statements is true A. Bagging improves accuracy by taking the sign of the sum of predicted values of each round. B. Same data item will only appear once in a round in bagging. C. Different weight is assigned to each data item in bagging. D. In bagging, if we have 100 samples, then we will do 99 rounds

A given field mouse population satisfies the differential equation d P _ 0.4p a40. dt where p is the number of mice and t is the time in months. (a) Find the time at which the population becomes extinct if p(O) = 1060 . Round your answer to two decimal places. ty = | 828 month(s) (c) Find the initial population p,, if the population is to become
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1. Let A and B be two events such that Pr( A) = 0.25, Pr(AUB) = 0.7 and Pr(ABC) = 0.1. In answering the following you must indicate all event and probability rules that you use. (a) Calculate Pr( AB). (b) Calculate Pr(B) and Pr( B| A). (c) Are the events A and B mutually exclusive? Give your reason. (d) Are the events A and B independent? Give
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Can anyone help me determine which of the two forecasts should be chosen and give the rationale for the decision??? I have attached the two forecasts. Number of Periods Analysis of Forecast Error Averaged 3 MAD MSE MAPE 5238.85000 91321353.66250 24.42787% Data Indicates which cells Moving average absolute in column to the right value of Period
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The heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What is the probability that the height of an 18-year-old man selected at random is between 69 inches and 73 inches? a. 0.5302 b. 0.1768 c. 0.3232 d. 0.3552 e. 0.6768

1) What is the critical value of z for a two-tailed test when you have 22 people in your sample.Assume alpha=.05 2) What is the critical value of z for a two-tailed test when you have 16 people in your sample.Assume alpha=.05 3) The _____ value is the value of the statistic that has a p value equal to alpha. 4) If you have 100 people in your

The procedure that maximizes the probability that the comparison groups will be equated on all extraneous variables is called ______. Group of answer choices random selection random sampling random assignment counterbalancing

What would be the best name for the experimental design for this experiment on the effects of feral predator management on native mammal populations? The aim of the experiment is to investigate whether baiting for feral predators will increase native mammal populations. Twenty locations are chosen at random within a large national park. Two

Students investigating the packaging of potato chips purchased bags of Smith's Original flavoured potato chips from their local convenience store. These bags are marked with a net weight of 28.9 grams. They carefully weighted the content of each bag, recording the following weights (in grams): (a) Use EXCEL to find the sample mean. Suppose that

Can someone double check this for me I am very confused. Is this t-test right for the Research Question (RQ) Does attending diversity training significantly affect the cultural competence score of employees? Hypothesis Null Hypothesis (H?): Attending diversity training has no effect on the cultural competence score of employees. Alternative
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Create Rose2.csv with forecast column after yhat for 2 Pt moving average model

3. If lul = 6, 131 = 5 and the angle between these vectors is 50, determine a) uxu [2 marks] b) u . D [2 marks]
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Truck Pollution: In an experiment to determine the effect of ambient temperature on the emissions of oxides of nitrogen (NOy) of diesel trucks, ten trucks were run at temperatures of 40 F and 80 F. The emissions, in parts per billion, are presented in the following table. Truck 40 F 80 F 1 838.7 8178 2 752.8 764.9 3 8569 843.0 4 901.0 796.1 5
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Given the annual interest rate and the compounding period, find i, the interest rate per compounding period. 3% compounded monthly I=_________% per month

I need help with this question. The diameter of a brand of ping-pong balls is approximately normally distributed, with a mean of 1.29 inches and a standard deviation of 0.04 inch. A random sample of 16 ping-pong balls is selected. Complete parts (a) through (d). a. What is the sampling distribution of the mean? O A. Because the population diameter
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ulaity data is dependent upon which three considerations

What is the distribution for the weights of one 25-pound lifting weight? What is the mean and standard deviation
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DAT/565 chapter 10 When one is pooling the sample variances, the common variance estimate is called the ______ _______

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Develop an original response describing a real-world example where statistics might be used to misrepresent data or where they might not fully represent an underlying truth without adequate disclosure of the limitations of what the data can and can't say about something. You might discuss: political polls with wide errors of margin, earnings

A batting average in baseball is determined by dividing the total number of hits by the total number ofat-bats. A player goes 1 1 for 5 5 ( 1 1 hits in 5 5 at-bats) in the firstgame, 0 0 for 3 3 in the secondgame, and 3 3 for 5 5 in the third game. What is his battingaverage? In what way is this number an"average"?

The following data represent the responses(Y for yes and N forno) from a sample of 20 college students to the question"Do you currently own shares in anystocks?" N N N N N N Y Y Y N N Y N N Y Y N Y N Y a. Determine the sampleproportion, p, of college students who own shares of stock. b. If the population proportion is 0.40 determine the standard

question shows below: You flip a coin until you get heads. What is the probability you flip the coin at least five times given that the second, fourth, and sixth flips were all tails? O 1/4 O 1/8 1/32 None of the other answers are correct 1/16
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How would I calculate this :The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records, they have found that the length of a first interview is normally distributed, with mean = 36 minutes and standard deviation = 6 minutes. (Round your answers to four decimal

Linear trend is calculated as Y hatt = 29.5 + 0.85t. What is the trend projection for period 15? 16.75 29.50 42.25 47.35

At alpha of 10%, a city planner wants to test the hypothesis that public transit users spend less time commuting to work than non-public transit users. She obtained the following summary data. Transit Users Non-Transit Users Mean (min) 20 30 Standard Deviation 5 10 Sample Size 26 26 The test value is _________________ Question 35 options: a) -

Markov process trials do which of the following? They are used to describe past behavior of the system. They are used to describe future behavior of the system. They are used to optimize the system. They lead to higher-order decision making

Prove by mathematical induction 4. (2 points) Prove by mathematical induction that for any natural number n: 12 + 32 + 52 + ... + (2n - 1)2 _ n (21-1) (2n+1) Anchor step Let nel. 132 3
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Information for Questions 2 and 3: Approximately 21 Americans die each day waiting for organ transplants.In a recent survey, a majority of Americans say they are in favor of donating their organs posthumously; however, only 45% of all American adults are actually registered organ donors. Suppose 20 people are randomly selected to participate in a

Your tabletop-gamer friend Terry asks, "Could you roll this six-sided die twice, and add the pips that show up? I'm afraid that this die might be loaded, and I'm more apt to look at pairs of rolls." Upon making 30 trials of this, here are the sums. We will proceed by hypothesis-testing at the=0.05 level. 961010654664351125555711877108511886 What

Problem 7. (Least Squares 89' System Identication)[8 points] Suppose a system P as in Fig I, which is described by some unknown dynamics and a set of noisy data (iii, 3);) where 214,331- are the input and the output of the system P at k = i, respectively. Assume that the collected data come from a model described by the following equation 39134.1
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A researcher took an SRS Of 4 high schools from a region with 29 high schools for a study on the prevalence of smoking among female high school students in the region . The results were as follows : Number of* Number of Female Number of Female* Number of" School Students Students in School Students Interviewed Smokers 1471 792 890 147 A WIN - 1021
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An executive is comparing employment reports for changes over the past five years. The comparison would show which trend for the older adult population? Group of answer choices Older persons remain a high majority of the total U.S. labor force The COVID-19 pandemic led to an increase in job opportunities Older persons in the labor force are a

On a roll of a dice, given that the first die is 3, what is the probability that sum of the dice is 8?

In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times. Previous testing has shown that a population standard deviation can be assumed to be 1.7o Celsius. You get a dream internship and take the temperatures at one of the Everglades stations and find a mean of 30.377o Celsius on 61

For a given matrix A, show that following two statements are equivalent: (i) Ax >= 0 and x >= 0 implies that x 1 = 0 (ii) There exists some vector p >= 0 s.t. p T A

and intermediate variables. 1. (6 pts) Let f(t) = In(x + 2y), where x = 3t2 and y = et. Compute d f(0). 2. Let f(x, y) = 19, where p(x, y) = x + y, q(x, y) = xy2, and r(x, y) = 3x - y. a. (6 pts) Compute the gradient vector of f, given by Vf = (fp, fq, fr). Evaluate this gradient vector at x = -1, y = 2. b. (3 pts) Use your answer in (a) to
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HAZOP is: Question 22 options: A semiquantitative technique A quantitative technique A semiqualitative technique A qualitative technique

A King in ancient times agreed to reward the inventor of chess with one grain of wheat on the first of the 64 squares of a chess board. On the second square the King would place two grains of? wheat, on the third? square, four grains of? wheat, and on the fourth square eight grains of wheat. If the amount of wheat is doubled in this way on each of
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The slope of the regression equation, b, is: Question 5 options: another way of expressing the standard error of the estimate the same as the coefficient of determination the correlation coefficient between X and Y usually hand-calculated

Grade distribution: A statistics teacher claims that, on the average, 5% of her students get a grade of 4, 8% get a B, 62% get a C, 15% get a D, and 10% get an F. The grades of a random sample of 100 students were recorded. The following table presents the results. Grade |4 B C D F Observed| 7 23 44 25 1 Send data to Excel (a) How many of the
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Consider the following table of hours worked by part-time employees. These employees must work in 5 hour blocks. Weekly hours worked- 5, 15, 20, 25 Probability--0.15 0.28 0.31 0.26 Find the mean of this variable.

The region of acceptance of a sampling distribution is typically the middle 95% of the distribution and is defined by the M 2 SD

Is this a true statement, "The most important component in survey research is determining sample size

Go to Figure 2.3 of the World Statistics 2018' report. The figure shows 1) the estimated incidence of tuberculosis from the year 2000 to the year 2016, where incidence refers to number of new cases, 2) the number of notified cases, where notified refers to cases that were reported to the WHO, and 3) the number of cases that were successfully

Please answer the question. 4. [25points] This question is about the principal component analysis. Let random vector pr1 have the covariance matrix prp. Suppose the principal components are Y1, Y2, . . . , 13,. o [10points] Are the principal components necessarily unique? Justify your answer. 0 [15points] Suppose, in a given problem, after
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Dado el siguiente diagrama de colaboracin que muestra la interaccin para la amortizacin mensual de los pagos realizados con tarjetas bancarias, cargando los pagos de un mes con una tarjeta en la cuenta asociada a dicha tarjeta, seala qu patrones GRASP son violados y modifica la colaboracin de modo que no se violen dichos patrones.

Assignment: a. what is the shape of each distribution based on visual inspection of the graphs? b. what conclusion can you draw about the symmetry of these distribution by comparing the size of the central tendency measures and examining the graphs for these variables? Explain the reasons for your answer. I'll share the two histograms and the
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