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Mathematics Questions and Answers May 17, 2023

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Let U,,.... Un be iid. uniform random variables on (o, 1). Let En = min (U ,, . . . Un). Given x20, compute X Bonus : Let Wn= max ( U,,..., Un). Given x,y so, find the limit J WnsI-. 5 15
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Look at the correlation between Risk-Taking and Relationship Happiness. Use the Standard Alpha level of 5%. How would you describe the relationship? a The relationship is non-significant b There is a significant negative relationship c There is a significant positive relationship d The correlation is zero My answer is B based off the Sig. being
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Null-hypothesis significance testing uses p-levels to identify the - of the difference between two groups in an experimental design. The p-level gives the probability of getting the result one found if the - were true. correlation analysisthe empirical methodsignificancehypothesisnull hypothesisfactor analysis

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When they ran Apriori on the entire dataset, they generated 7 rules with confidence above 90%. When they ran Apriori on only women, they had 14 rules with confidence above 90%. Since the second experiment had more rules, we can conclude that

In an article published in the Sunday times it was reported that form companies that 25% of chief information officers (CIOs) report to the chief financial officers(CFO), 46% report to the chief executive officer (CEO) and the reminder report to someone other than CFO or CEO. Suppose that 2 CIOs are selected at random form2 independent companies.

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In the formula that computes a t-value, what does X _1 represent? Group of answer choices the variance for Group 1 the mean for Group 1 the number of participants in Group 1 the standard deviation for Group 1 Flag question: Question 7 Question 74 pts The T.TEST function in Excel computes which of the following? Group of answer choices the z-value

Suppose that a random variable X is normally distributed with standard deviation 2.4, however the mean is unknown. It is known that 2.5% of values are below an x value of 18. What is the value of the mean? Give your answer correctly rounded to two decimal places. Do NOT include units in your answer.

(a) (3 points) In the K-Means algorithm, the initial placement of centroids has a minimal impact on the quality of the resulting clustering. (b) (3 points) The Expectation Maximization E-M algorithm will always converge to global minimum. (c) (3 points) Suppose two association rules are derived from the same frequent pattern; the two association

please help me with the problem below, using bionomial probability formula. Thank you. In a survey of adults in the united states, 34% said they have seen a person using a mobil device walk in front of a moving vehicle without looking. you randomly select 100 adults in the us and ask them whether they have seen a person using a mobile device walk

The odds of a wildcat oil well being successful are much more better than the odds of winning at roulette

In the LazyDog Backwards Operating (LBO) temperature scale, water freezes at 160 LBOs and boils at 37 LBOs. F 106 F (LBOS)
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The scores on an economics examination are normally distributed with a mean of 78 and a standard deviation of 16. If the instructor assigns a grade of A to 14% of the class, what is the lowest score a student may have and still obtain an A? (Round your answer to two decimal places.) You may need to use the appropriate table in the Appendix of

Evaluate each geometric series described a, = 2, a = 559872, r = 6 Co
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When using a self-organizing feature map for data imputation, which of the following approaches will provide a more accurate estimate for a missing value? Question 17Select one: a. replace the missing value with the average of the corresponding weight value over all of the immediate neighbours of the best matching neuron and that of the best

Which of these statements describes how survivor bias and selection bias are related? a. The sample data set consists of a disproportionately large number of observations corresponding to positive outcomes for a particular event. b. The sample data are not representative of the population that is being studied. c. The sample has not been properly

Final Research Question In gene5.2 Create a scatterplot with E. coli on the horizontal axis and S. epidermidis on the vertical axis. Use the fit_line = True option to have the regression line superimposed on the graphral, if a compound was effective against E. coli is it most likely effective against S. epidermidis? To answer this question,

An investment company wants to study how the changes in unemployment rate affect one of its stock investments. Which statistical method would be best to use in this situation?

Make a context-free grammar for 0^a 1^b 0^c where a+b=c and a,b,cis greater then or equal to 0

If a researcher wanted to determine whether there was any difference in the number of days missed by a group of employees after implementing a particularly harsh program for unexcused absences, compared with the number of days missed before the program was implemented, the correct test would be an independent samples one-tailed t test

What does this equation mean in terms of a Linear Model? E[y|X] = p(y = 1|X) 1 + p(y = 0|X) 0 = p(y = 1|X)

Given the contingency table below, what is the probability that a randomly chosen organism is a snake, given that the organism is poisonous? Type a fraction in simplest form. Organisms Poisonous Not poisonous Total Snakes 11 5 16 Plants 12 40 52 Total 23 45 68

summarize "If there are any outliers in the data, that extreme data point would need to be removed, otherwise the data would be skewed and not necessarily a valid representation of the average base pay

In the regression equation y = b0 + b1X1 + b2X2, if b1 = 4, then how much would the predicted value of y differ for two observations that had the same value of X2 but differed by 86 on X1?

You are told there are three events A, B and C, but have only been given the following probabilities: P(A) = 0.23 and P(B) = 0.35 What is the probability of event C, if only these three events exist? Please provide your answer in decimal form or percentage form, correctly rounded to two decimal places.

Why do I think this? What aspects from my What implications Personality life provide evidence might this have for me that this preference in the workplace? describes me? Introversion Intuition? Thinking Judging
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inequalities 2. Solve the following inequalities: (a) |x+ 111 (b). |x + 4122 (d) |x+ 1/50
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A group of researchers is interested in whether women sleep less after they have children compared to before they have children. They recruit a sample of 12 women who are in their first trimester of pregnancy and administer a survey about the number of hours that they spend on various activities (leisure, housework, sleep, etc.). Then, they follow

Jermaine is testing the effectiveness of a new acne medication. There are 100 people with acne in the study. Forty patients received the acne medication, and 60 other patients did not receive treatment. Fifteen of the patients who received the medication reported clearer skin at the end of the study. Twenty of the patients who did not receive

Researchers recorded the length of gestation for a sample of 40 mammals. They want to know if the average gestation of mammals is longer than 200 days. Question 33 options: t-test for a single mean t-test for a difference in means (independent samples) z-test for a single proportion Chi-square test ANOVA

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The Creamery wants to know if its customers tend to consume more vanilla or chocolate ice cream annually. They obtain a sample of 100 customers and ask each person how many gallons of vanilla they consumed in the last year and how many gallons of chocolate ice cream they have consumed in the last year. Is this an example of an independent or

0 Explain the main properties of the Normal distribution. 0 Explain the main idea of the Law of Large Numbers. 0 Explain the main idea of the Central Limit Theorem. 0 Can you use the CLT in exposing cheating and corruption? Explain how
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Find the domain and range of the relation { (-2, 21), (22, 12), (3, -18), (23, 3), (-19, -12) } Provide your answer below
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The campus counselor wants to determine his client is at significant risk for an eating disorder. The population mean and standard deviation are known for a particular eating disorders survey scale. The counselor asks his client to fill out an eating disorders survey scale of 15 items. Which of the following statistics would you use to determine

Which of the following is a true statement about the comparison of Euclidean distance versus Manhattan distance? Group of answer choices Manhattan distance is distorted less by outlier observations. Euclidean distance is more applicable to binary variables. Euclidean distance is less expensive to compute. Manhattan distance scales better to higher

The 2 (chi-square) distribution, with 1 degree of freedom, is the distribution squared Z-scores, randomly selected. When Z=ppp(1p)n is approximately normal, 2=(OE)2E will vary approximately with the 2 distribution. Do the expected frequencies ( np and n(1p) ) satisfy the conditions of an approximate 2 distribution

Match the following pieces of a regression formula to their proper definition - X - B1 - B0 - Y - epsilon A. Level of predictor variable B. Slope of relationship between X and Y C. Level of response variable D. Residual error E. Y-intercept for relationship between X and Y

What method can be used in order to determine whether a model has an overfitting problem?

Because 10% of the reservation holders are "no-shows," a U.S. airline sells 400 tickets for a flight that can accommodate 380 passengers. Find the probability that one or more reservation holders will not be accommodated on the flight using normal approximation

Draw using excel Maximize H=x+3y Objective function subject to x+y50 2x+y60 x0,y0 Constraints

A 1:2.5 scale model of a clothes wringer is 18.9 in. tall, 6.1 in wide, and 1.3 in. deep. The wringer handle is 4.7 in. long. Determine the actual dimensions of the clothes wringer to the nearest hundredth of an inch. Actual Height: Answer 1 Question 29 in Actual Width: Answer 2 Question 29 in Actual Depth: Answer 3 Question 29 in Actual Length of

El cambio de moneda: Pregunta 4Seleccione una: a. abarca la compraventa de billetes extranjeros y la operacin en la que un determinado activo queda expresado en una divisa diferente. b. abarca todas las operaciones que estn relacionadas con dinero fsico, por ejemplo una transferencia

The accumulated value at time t of an investment portfolio is given by an amount function of the form A(t) = u vt, for t > 0, where u and v are both positive constants. At time t = 10, the amount in the portfolio was 11,000. At time t = 15, the amount in the portfolio was 14,000. find the accumulation function

7. A soccer ball is kicked into the air such that its height, h, in metres, after t seconds can be modelled by the function h(t)=- 4.9t 2 12t 0.5. a) Determine the average rate of change of the height of the ball from 1 s to 2 s. b) Estimate the instantaneous rate of change of the height of the ball after 1 s. c) Sketch the curve and the tangent.

Question 4 (1 point) A player at 3rd base makes his run for home to try and beat the throw to the plate. He begins his run from rest, and covers 10.10 m while constantly accelerating, for 2.55 s to reach his top speed. Determine the velocity (m/s) of the player after accelerating over that time & distance. Your
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The outcome for each of the trials (Skittles) above is the color. How many possible outcomes (k) are there per trial

Class boundaries of 1.00 - 1.49 1.50 - 1.99 2.00 - 2.49 2.50 - 2.99 3.00 - 3.49 3.50 - 3.99

Why do I think this? What aspects from my What implications Personality life provide evidence might this have for me that this preference in the workplace? describes me? Introversion Intuition? Thinking Judging
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Suppose that we know that in the population of all American males, 20% have some sleep disturbances. If we were to repeatedly pull samples of 64 American men from that population and ask each individual if he experiences any sleep disturbances, what would be the standard deviation of the distribution of p-hats? Use the normal approximation method

How many minutes will it take for a 1 liter bag of D5W to be delivered if is is given at 20 ml/min?

A classifier is trained to recognize whether a supplier delivery will arrive late (after its scheduled arrival time). The following results are obtained. Given the following confusion matrix, calculate the F1 (F-Score) of the trained classifier (in decimal form to 3 digits) for the "yes" class. Your calculations must be shown for partial credit on

In regression, we always regress the y variable on the x variable. Group of answer choices True False

consider the data set { 5, 6, 7, 11, 12, 14, 15, 15, 15, 16, 17, 18, 19, 20, 20, 21}. compute the mean compute the median compute the mode compute the five numbers for this data that appears in the box plot sketch the box plot for this data

Presented below is a "data scenario." Decide which type of grouping (single-value, limit, or cutpoint) is probably the best. The number of students per dorm room on a college campus

The x-axis of a bar graph indicates categories of a nominal dependent variable. a. True b. Fals

Find the center, the vertices, and the foci of the ellipse. Then draw the graph. (x - 4) (y - 3) + =1 4 9
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6. An index consists of related components. To calculate the value of a statistical index, which is used? ASSIGNMIN the real value of its components he weighted mean of its components QULE c the percentile rank of its components d. the per capita value of its components PERFORMANCE TASK TEST The number of nurses in Canada in 2007 was 330 000 and
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Mode of a data set The following list gives the number of public libraries in each of 10 cities. 2, 12, 4, 13, 11, 3, 6, 10, 5, 9 Send data to calculator Find the modes of this data set. If there is more than one mode, write them separated by commas. If there is no mode, click on "No mode." Na X
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Choose the best answer for each. Mark your choice on the bubble sheet
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1) Executive summary of your investigation, recommendations, and associated risks. 2] A problem statement that you have identified from the WSJ video and other sources
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A rectangular dining room has an area that can be represented by the function. If the width of the room is ( x + 4), what is the length?

Es obvio que Melanie y Paul _____Blank (quererse) mucho

If a distribution has a larger curve (kurtosis) than a normal distribution, it is called: Select one alternative: Negative skew Platykurtic None of the options are correct Leptokurtic

Let SU;big, be i.id. uniform random variables on Co,I). Let N = ming h : Un EL as a]? and let Y= UN. Find the joint distribution of ( Y, N ), and determine whether they are independent
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Dr. Bickell, a researcher, has made an attempt to organize data and IV-DV relations within a specific portion of a larger, more comprehensive research area or theory. What has Dr. Bickell attempted to make? A hypothesis

Using knowledge of ballistics, investigators can determine ___________. a the exact location from which a bullet was fired b an approximate location from which a bullet was fired c whether the shooter was male or female d whether the shot occurred at night or during the dayHow are samples of ignitable liquids typically collected for analysis by GC

All electoral votes for a state are given to the candidate who wins the most votes in that state is Group of answer choices a run-off system none of the choices a winner take all system a top-two system a plurality system

A researcher reports that there is no relationship between exam grades and amount of time spent reviewing notes. This finding is an example of a A researcher reports that there is no relationship between exam grades and amount of time spent reviewing notes. This finding is an example of a correlation near one positive correlation correlation near

1. Una empresa tiene una lnea de crdito aprobada por $ 20.000.000 y la tasa de inters fijada para un mes en particular que tiene 31 das es del 2,75% mensual. Los movimientos de dinero son los siguientes: Entre los das 1 y 5 del mes, la lnea no se encuentra utilizada. El da 6 se giran $ 4.000.000. El da 9 se abonan $ 2.000.000. El da 11 se giran $

Simplify. Assume that all variables are nonnegative. V45a213 A 3ab B 3ab2 V5b C 3ab D 3ab2
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The box plots below show the weights of the 2014 Baltimore Orioles and 2014 Baltimore Ravens players.Orioles' pitcher Tommy Hunter has the maximum weight of his team (245 lb).Approximately what percent of the Ravens' team weighs more than him? ... Ravens Oriolest 200 250 300 Weights
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A farmer in the Rio Grande Valley employs lots of workers to pick tomatoes and pays them $4 per basket. The farmer takes a random sample of 26 pickers and finds that they pick an average of 120 baskets per day with an estimated standard deviation (S) of 15 baskets. He asks you to estimate the average number of baskets picked per day by the

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Which of the following is an assumption of the independent t test and one-way ANOVA? Which of the following is an assumption of the independent t test and one-way ANOVA? all of these populations from which samples are selected are normally distributed homogeneity of variance independent observations within each sample

The math-challenged sports editor for your newspaper asks you for the median salary of the starting pitchers of the team he is about to write about. Here are the salaries of pitchers: $28.9 million, $644,000, $932,000, $760,000, $2.6 million, $5.4 million, $1.4 million. So what is the median salary of the group

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The Indus River runs nearly 2,000 miles across the Indian subcontinent, through mountains and arid regions. Place the following areas in order to trace the beginning of this important river to its end. Start by clicking the first item in the sequence or dragging it here Arabian SeaHimalayan glaciersthe PunjabSind

nomTICWOIN O Point If $6000 is invested for six years and seven months at 6% compounded semi-annually, what is the interest that the investment eam The amount of interest is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)
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how to find p value for testing a claim about a standard deviation

Interpret the cutting Plate for the Cone(10,15) by slicing from Z=0 to 15 (Z=1) and find the intersection points. Assume of 8 equal triangles to cover the base circle The side covering triangles are defined by the help of base circle triangles

Which of the following numbers could be the probability of anevent? 0, 1.44, 1, 0.31, 0.06, -0.6 The numbers that could be a probability of an event are (Use a comma to separate answers asneeded.)

2 In the figure, if Q = 30 HC, q = 5.0 uC, and d = 30 cm, what is the magnitude of the electrostatic force on q? 2d O 20 O 15 N R 7.5 N O 23 N O Zero
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In an effort to ensure that results reported from different forms represent the same level of performance, standardized testing programs report which of the following? a. Raw scores b. Normed scores c. NCE scores or d. Scaled scores

Given the probability histogram pictured for a discrete random variable X, what is x ?

Find the local maximum:The local maximum is y= ? ch X
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Multiple Regression - What Would You Add? Consider your reply to the simple linear regression discussion when you indicated what you would like to study in the form of a regression to predict a particular outcome. What additional independent variable(s) would you add? How do you predict they might impact the dependent variable (increase it, lower

Evaluate each arithmetic series described \f
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Aggregate losses for a portfolio are modeled as follows: (i) The number of claims follows a Poisson distribution with mean 500. (ii) The amount of an individual claim follows a Weibull distribution with = 2 and = 60. (iii) The number of claims and individual claim amounts are mutually independent. The premium is equal to (1 + c) times the expected

The data to the right contain the per-capita 21,694 20.015 17,876 17,305 16,521 o energy consumption, in kilowatt-hours, for each of the 20 S 16,396 16,240 15607 14483 14333 provinces ofa nation. 13,995 13,922 13,676 13378 13315 Complete parts (a) through (c) below. 13,208 9,861 8,496 6.007 5272 a. Compute the mean, variance, and standard
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Say, that A and B are two independent events such that P(A) = 0.5 and P(B) = 0.36. What is the value of P(A and B)? Give your answer to two decimal places.

2. What distinguishes non-linear programming from linear programming? A. Linearity of the objective function B. Inclusion of non-integer variables C. Complexity of constraints D. Quadratic or nonlinear objective or constraints

If there is 50% increase on a $78 item, then how much is the new cost for next year? Round to the nearest penny. Learn This: Calculate the price increase by converting the 50% to a decimal and multiplying it $78. Then add to the current item price $78. Round your answer to 2 decimal places.

Radiofrequency rhizotomy of the left T10-T12, open approach. What are the correct PCS codes? There are two

if R is a ring, then show that R/(0 subscript R) is equivalent to R

The SRC is going to contribute $195 to help set up the vegetable garden, which is 65% of the total costs. How much will the garden cost to setup in total? You must show full working out

Discuss in detail the characteristics of probability and nonprobability sampling. Discuss the reasons that researchers would use conditional probability instead of unconditional probability in their study.

The confidence limits in a 100% confidence interval are infinite, and therefore, impractical. Group of answer choices True False

Question 4 Find the coordinates of the vertex for the graph of the equation y = 5x 2+ 30x + 50 A (- 3, 5) B (3, 180) C ( - 3,-95) D (3, 195)
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