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Mathematics Questions and Answers May 17, 2023

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data are classified into mutually exclusive categories where ranking and order is imposed

Suppose T1, T2, , Tn are i.i.d. W (, p) and data are noninformatively right censored (i.e., we observe (Ui, i) for i = 1, 2, . . . , n). Determine the (observed) score and information equations; note: MLEs not expressible in closed form. How would you use these to test H0 : Ti Exp() i = 1, 2

7 of 10 This table shows how many male and female students attended two different movies. What is the probability that a randomly chosen person from this group is male? Round your answer to two decimal places. Action Drama Total Male 105 124 229 Female 99 151 250 Total 204 275 479 A. 0.23 B. 0.43 C. 0.48 D. 0.11

11. The formula "SSbetween/dfBetween" is used to compute A) the F ratio for a repeated measures design. B) the between-groups sum of squared deviations. C) the estimated variance of the distribution of means. D) the between-groups estimate of the population variance

Given the equation of a regression line is y = 3.5x - 5.4 what is the best predicted value for y givenx x = - 1.27 Assume that the variables and y have a significant correlation

Is the interpretation of the following regression line correct? Regression line: y = 0.89 + 2.3 (a) Interpretation: For every one unit increase in y, there is a 0.89 increase in x. O True O False
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How do one interpret the following Arima results in r ARIMA (1,0,0) with non-zero mean Should i not ensure that i have a zero mean

Which of the following statements describes men's general life expectancy? O By age 25, women begin to outnumber men. Today, fewer male babies are born than female babies. O By age 85, women outnumber men by 2.5 to 1. O By age 65, men outnumber womena

The monthly utility bills in a city are normally distributed with a mean of $100 and a standard deviation of $12. If 300 bills are randomly selected, about how many would you expect to be less than $90

Match each symbol with its meaning. Question 8 options: combined standard deviation (for independent samples t-test) estimated standard error actual standard error sample standard deviation of the difference (for dependent samples t-test) sample mean of the difference (for dependent samples t-test) population mean sample standard deviation sample

Read the proof of Theorem 5.4.1 (on p. 144). Which set below contains 2 ? O Ag O A7 O A2 O A3 O All
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What steps are needed for describing data? Focusing on the outlying data Not understanding what the data show Providing summaries of measures Posting the data on social media

A highway study of 10,000 vehicles that passed by a checkpoint found that their speeds were normally distributed, with a mean of 63 mph and a standard deviation of 7 mph. How many of the vehicles had a speed of less than 42 mph

content area top Part 1 Decide whether the following statement is true or false. The correlation coefficient is a measure of the strength of a linear relation between two variables and must lie between minus1 and 1, inclusive. Question content area bottom Part 1 Choose the correct answer below. True False

7A) In a random survey, American adults had to choose which item they would rather give up: chocolate OR cell phone. 79% said they would rather give up chocolate. In a simple random sample of 400 American adults, what is the standard deviation for the number of expected adults that would rather give up chocolate. Round to 2 decimal places. 6B) In

Question 11
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Use the given data to determine what value should be used as the "best estimate" of the population mean, and then construct the 95% confidence interval. Assume that you can use the given sample standard deviation (s) as an estimate of the population standard deviation (sigma). Data from the National Center for Education Statistics on 44004400

What is the process performance index (Ppk)? The same calculation as the Cpk but without the assumption that the data have been cleansed of special causes The ratio of the customer's specification range to your process variability taking the average (process center) into account The process potential for processes that have only an upper

In 1912, the RMS Titanic, a British passenger ship, sank in the North Atlantic Ocean after colliding with an iceberg. Historians do not know the exact passenger list, so the death toll is estimated. Here is data from the 2201 passengers on board, by cabin class. First Class Second Class Third Class Crew Row Totals Died 122 167 528 673 1490

Find the characteristic equation for the recurrence relation Sn = 6Sn-1. The equation is: =0 Submit
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4. [0/8.33 Points] DETAILS PREVIOUS ANSWERS WANEFMAC7 3.2.029. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHE When I was considering what to do with my $10,000 lottery winnings, my broker suggested that I invest half of it in gold, the value of which was growing by 7% per year, and the other half in certificates of deposit (CDs), which were yielding 4%
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Travels 20.3km to and from work for a 5 day work week, with 4 weeks per month. The cost is $1.45 CAD per gallon. Car average 25 miles per gallon. figure his monthly gas expense

In selecting independent variables for a multiple regression, which of the following is NOT one of the rules? Group of answer choices The independent variables are significantly correlated to the dependent variable The independent variables are significantly correlated to each other The independent variables are conceptually related to the

Under the Safety domain, out of all 6 areas (HAI-1 through HAI-6), what was the highest measure score any of the hospitals received? Under the Safety domain, out of all 6 areas (HAI-1 through HAI-6), what was the highest measure score any of the hospitals received? 3 4 5 6 7 8 9 10

Find the average rate of change of g (x) = -3x-+4 from x =5 to x =9. Simplify your answer as much as possible. X 5 Undo
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Suppose that P(A) = 0.2, P(B) = 0.3 and P(AB) = 0.1. Find P((A B0 ) (A0 B))

On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.7 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the

Match each step on the left with the procedure at that step on the right. Step a 1 - 2 - 3 - 4 - 5 - 6 - 7 g 8 To do reject or fail to reject null compare p-value to alpha calculate p-value identify test type and relevant statistic identify the parameter calculate test statistic write conclusion write null and alternative hypotheses

Choose the statements that accurately describe the Daily Value. Multiple select question. Appropriate for ages 4 through adulthood Applicable to males and females DVs have not been set for vitamins and minerals Based on the consumption of a 2000 kcal diet

SUMMARY OUTPUT Regression Statistics Multiple R 0.832340809 R Square 0.692791223 Adjusted R Square 0.692169343 Standard Error 8617735.933 Observations 991 ANOVA SS MS F Significance F Regression 2 1.655E+17 8.273E+16 1114.027 6.2E-254 Residual 988 7.337E+16 7.427E+13 Total 990 2.388E+17 Coefficients itandard Errol t Stat P-value Lower 95% Upper
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According to data compiled by the Campus Ghost Seekers Commission, 15% of UCF students claim to have seen a ghost. Assume the appropriate conditions are met. 1) If 22 UCF students are sampled find the probability 7 have not seen a ghost

Define the points P(1,3) and Q(3, - 4). Carry out the following calculation. Find two vectors parallel to QP with length 4
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Question 3 a) Show that d _ a [|n(sec(x))] tan(x) (3 marks) b) Show that a general solution of the following differential equation 2 _ cos x 3x ( ) dx y is given by 'A 3 3xtan(x) y cos (x)e (10 marks) 0) Given that y= when X: 1, find the particular solution (2 marks) 8 3
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una compaia farmaceutica desea evaluar el efecto que tiene la cantidad de almidon en la dureza de las tabaletas , se decidio producir lotes con una cantidad determinada de almidon y que las cantidades de almidon a probar fueron 2%, 5% y 10 %

Fill in the blank. In probability theory, _______ is a subset of the sample space

You are testing if daily mean wait times for patients at clinic A are statistically different from mean wait times at clinic B, but no expectations of which clinic might have a longer wait time. For a two-tailed test, your NULL hypothesis should be stated as: Group of answer choices H0: mean A is equal to mean B H0: mean A is not equal to mean B

Counting Blessings Versus Burdens Quiz The gratitude group has statistically significant lower mean score on gratitude composite affect rating than the hassles group. Group of answer choices True False

A physician order for a client states Lasix 2 mg/kg PO QID for weight 23 Ibs. The medication bottle label states Lasix 8 mg/ml solution. How many ml of Lasix solution does the nurse administer for each dose? Round your answer to the nearest tenth
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[E = \frac{hc}{\lambda}] [E = \frac{(6.626 \times 10^{-34} , \text{J} \cdot \text{s})(3.00 \times 10^8 , \text{m/s})}{400 \times 10^{-9} , \text{m}} why does it look like this

15. To find the p-value of the individual significance of the independent variable x, what R command could you use? a. 2*pt(-3.919, 36) b. 2*pt(3.919, 36) c. pt(-3.919, 36) d. pt(3.919, 36) 16. To find the critical value of the F value with alpha=0.05, what R command could you use? a. pf(15.35, 1, 36) b. qf(15.35, 1, 36) c. pf(.95, 1, 36) d.

Consider the following linear regression model, which links the response variable y with k predictor variables x1, x2,..., xk:y=0 1x1 2x2 ... kxk . If, for example, the slope coefficient 1 equals zero, then the predictor variable x1 does what and implies what? Choose all that answer the 'does what?' and 'Implies what?' questions! Multiple select

1 Find the value of zthat corresponds to a confidence level of 89.48%. A) 1.25 B) 1.62 C) 0.0526 D) -1.62 Question 2 If the computed minimum sample size a needed for a particular margin of error is not a whole number, round the value of m (up or down) to the next (smaller or larger) whole number. A) up: smaller B) up; larger C) down; smaller D)

5. The area bounded by the curve (y = N/ - the x-axis, and the lines x = k and x =2, where 0
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According to police sources, a car with a certain protection system will be recovered 95 %95% of the time. Find the probability that 33 of 66 stolen cars will be recovered. Round the answer to the nearest thousandth

What embodies a group of techniques used to conduct quantitative research where there is no manipulation done to any variable in the study

b Population - Statistic - Sample - Parameter The 20 Oxnard College students who were surveyed All students in Oxnard College The average number of classes of those 20 students in the sample is 2.2 The average number of classes of all students in Oxnard College is 2.6 Submit QuestionQuestion 12

In identifying the research design, the researcher should take in consideration of the following, EXCEPT. Question 42Answer a. Data collection tool b. Respondent's budget c. Locale d. Time

Can a research study have more than one research question? No, you can have multiple hypotheses but only one research question per study Yes, it is possible to have multiple research questions and multiple hypotheses No, you can identify a specific hypothesis for a research study, but not a research question Yes, you can have multiple research

Consider the system dx dy =y(5 - 4x - 22) dt = (3 - 2) (y- 2), dt a Find all the critical points (equilibrium solutions). Number of critical points: Choose one
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Describe how you would analyze the data, but write the paper as if you did the analysis (e.g., "I ran a general linear regression and calculated the point of subjective equality (PSE)", not "I would calculate the PSE")

Find the magnitude of vector AB (|AB ), if the vector has an initial point at A(-3, -5) and a terminal point at B(4, -4)
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The percentage of U.S. households made up of unmarried couples has ______ dramatically over the last two decades. Multiple choice question. decreased increased

In a study of adults in a city, a researcher is interested in the relationship between height and age of adults. The independent (explanatory) variable is: height age The dependent (response) variable is: age height The correlation between the two variables will most likely be: none negative positive

1. The random variable X defined on the positive integers has pif f (x ) = C- for r = 1. 2. 3. ... x! (a) Find the value of C such that f(x) is a valid pmf. (b) Find the expected value of X
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A local gym is installing new rubber flooring in a room that measures 21 yards by 16 yards. The rubber flooring is sold by the square foot. How much rubber flooring does the gym need? Write your answer as a whole number, a decimal, or a simplified fraction or mixed number. Do not round. square feet

hoe to chart these answers on excel Answer: For Weight: Standard Deviation: 13.6 Variance: 185.1 For Height: Standard Deviation: 18.9 Variance: 357.1

Will expected value of perfect information always be greater than or equal to expected value of sample information? Discuss

**5. [1 point] in r studio Add a new column to `anorexia` called `diff` that is the difference betweenthe women's weights before and after treatment. Assign this new dataset to an object called`anorexia_diff`.**

In scatterplot analysis, if you only have information about the dependent variable's scores, and you want a general rule for predicting each case's dependent variable score, the best rule is to predict the a) median b) mean c) range d) intercept e) slope

If the mean of the heights of males in Missouri is 178cm and the standard deviation is 8cm, what is the percentile for a male's height which is 186 cm

use the given information to find the number of degrees of freedom the critical values X 2/L and X 2/R and the confidence interval estimate of o. It is reasonable to assume that a simple sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 95% confidence; n=24, s=0.21mg DF=? (type a whole number)
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Date: 5/ 13/ 2028 11 (7%) Problem 14: In a diffraction experiment, a coherent light source illuminates slits in a diffraction grating, and the resulting pattern is projected on a scree is separated from the barrier by a distance which is very large as compared to the wavelength of the light source and to the slit width and slit separation of the g
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The graph below shows the sales 3 (in thousands of items) of a new item 13 months after entering the market. What is the percent rate of change of sales 4 months after entering the market? Select the numerical answer and the units from the dropdown menus below. The percent rate of change is [59'9\"] V [ Select ] v
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Fill in the blank so that the resulting statement is true. A data value that occurs most often in a data set is the measure of central tendency called the _____. Question content area bottom Part 1 A data value that occurs most often in a data set is the measure of central tendency called the midrange. mean. median. mode

Regression might be used to predict an interest rate given to borrower by the lender based on certain risk characteristics. In this regression, potential independent variables would be which of the following? Multiple Choice Demographic characteristics. Loan acceptance. Risk characteristics. Interest rate

Question 14 490 21 km 570 B Points A, B and C are three flags on an orienteering course, The angles at A and B are 49 and 57 respectively, and the length AC is 21 km. Find the length BC, correct to two decimal places. BC - 36.59 km
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3. Optional participation in the study [ Select ] ["Confounding Variable", "Treatment Group", "Control Group", "Response Variable", "Explanatory Variable"]

We consider the function f defined by f (x) = [* + 9 - 15 - for a * +6. 22 - 36 Our goal is to understand the behavior of f near x = 16. Note that 6 > -9 and -6 > -9. So to evaluate the limits, we can restrict ourselves to the region x > -9. a) If x > -9, then | + 9| = FORMATTING: Your answer should not have an absolute value. Therefore, for x >
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Determine whether or not the distribution is a discrete probability distribution and select the reason why is this not discreet x 0 5 9 P(X=x) 18 12 38

In a normal distribution with a mean of 73 and a standard deviation of 9.5, find the score that corresponds to the 60th percentile and then paste the plot of the distribution here in r studio using the tiger stats package

State whether the data described below are discrete or continuous, and explain why. The heights of trees in a forest

For first-order Markov processes, which of the following is true about the probability that a system is in a particular state after a large number of periods? The probability is the same for every ending system. The probability is independent of the beginning state of the system. The probability is dependent on the beginning state of the system.

What type of hypothesis test should researchers use to determine... (a) if there is a significant difference between the proportion of international students and domestic students who drop out of college. one-sample two-sample (b) if the proportion of red cars who receive speeding tickets is more than other car colors. one-sample two-sample (c) if

5. [-/1 Points] DETAILS HARMATHAP12 9.3.029. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER If the instantaneous rate of change of f(x) at (5, -9) is 8, write the equation of the line tangent to the graph of f(x) at x = 5. (Let x be the independent variable and y be the dependent variable.) Need Help? Read It Watch It
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2. DF question : Assume that we have a dataset with n = 256 observations. For each scenario below, determine the error degrees of freedom. It may be helpful to write out each model. Type the numerical integer for each submission. Example is the value is 254 type 254 with no additional markings. Recall: df = n - p - 1 (a) We create a first order

Do experimental design includes pre and post-test only

Reword: A pie chart is to help paint a clear picture of your online habits.

Here is a null hypothesis: There is no difference between the same seventy employees' salaries before and after the 2020 pandemic in this company. This hypothesis is likely Question 8 options: a one-tailed hypothesis that can be used to test difference between two paired samples. a hypothesis that can be used to test difference between two

Class Activity: Polynomial regression We have the following dataset: X Y 1 3.2 0.5 1.8 0.25 1.7 -1 -0.8 -0.5 0.2 1.5 3.8 We want to predict the value of Y using the following regressor:

Explain when it would be appropriate to use a t test versus a one-way analysis of variance. To get full credit you must provide the following in your answer: what type of data can be used for each, how many IVs you would have for each, and how many levels of the IV you would have, when and why it would be necessary to use post hoc tests

content area bottom Part 1 a. What variable is described by the data? Is it discrete or continuous? The variable described by the data is the highway gas mileages of random cars and it is a continuous variable. Part 2 b. Construct a split stem

interpreta lo siguiente: cronbach alpha composite reliability (rho_a) composite reliability (rho_c) Average variance extracted (ave) Calidad 0.889 0.896 0.914 0.605 expectativa 0.424 0.428 0.707 0.451 imag 0.722 0.765 0.82 0.485 lealtad 0.549 0.816 0.759 0.57 satisfaccion 0.81 0.828 0.887 0.723 valor 0.871 0.886 0.939 0.886

Steve is a new sales manager who is trying to improve retention of his employees by making sure they are paid in line with the industry standard. The average base salary for salespeople in Steve's industry is $44,000 per year. Steve randomly selects 20 salespeople at his company and determines their base salaries. Steve conducts a one-mean
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What is the moving average forecast for the next month

Marc 2211 Examen de Unidad 2: mecnica de mercado y conducta del consumidor. Incluye los ejercicios relevantes a los captulos 4, 6 y 7 del libro de texto. Tendr una hora para completarlo.Tendr una sola oportunidad para tomarlo. No podr retroceder luego de contestar una pregunta

The ___________ is the exact opposite of the null hypothesis and contains all of the other possibilities. Question 5 options: a) alternate statement b) theoretical hypothesis c) alternative hypothesis d) hypothesis theory

Operationalization is the process describing how a concept is connected to the way it is measured, and the ______ of a variable is the way it is measured. A. indicator B. conceptualization C. functional definition D. operational definition

Question #1 Thirty fair dice was dropped/rolled on a table. The result is recorded in the table below. Construct a (frequency) histogram, using a width of 1 for each class. 4 4 4 5 4 4 2 2 1 4 1 3 6 3 1 1 5 3 2 3 4 5 3 6 6 2 4 3 6 2

A conducted study revealed that teams are spending an average of nine hours online each day The standard deviation is 1.25 hours the probability of students spending less than 9.75hours online is 0.73 percent if a high school has 876 students how many of these students will we expect to spend more than the indicated time online in a single day

data are classified into categories with rankings and are mutually exclusive in addition to distance between categories

35. Healthy_Living. Healthy living has always been an important goal for any society. Most would agree that a diet that is rich in fruits and vegetables (FV) and regular exercise have a positive effect on health, while smoking has a negative effect on health. The accompanying data file shows the percentage of these variables observed in various
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1) find a trend incident in regard to using a jackhammer in construction in Alberta, Canada and explain how belts that scan your body can fill the gap? 2) how can we invent a belt that identifies when the jackhammer is having big impact on a worker's body?

Given the following bivariate data: x 20 35 50 75 90 y 4.50 4.00 2.75 1.75 2.25 a) Plot each point in the graph below. 20 40 60 80 100 1 2 3 4 5 Clear All Draw: Dot b) The linear relationship between the two variables is: positive negative

consider two workshops A and B. A is a wood working shop with a probability of fire of 0.05. B is a metal workshop and the probability is 0.02. the buildings are so close that if one catches fire there is an 85% chance that the other will burn. determine the probability that A starts fire and spreads it to B

3.Data for the number of counties in each state is included in the chart below with the exception of Georgia and Texas which were outliers with 159 and 254 counties.Calculate the mean number of counties. Number of counties Frequency Mid - point Mid-point times frequency 15 - 29 9 30 - 44 6 37 222 45 - 59 4 60 - 74 6 75 - 89 8 90 - 104 5 105 - 119

Note : focused this line- send me answer in type form strictly prohibited handwritten solution don't use chatgpt Or copied content show your own work with step by step explanation do not miss single step mention formula and concept. Submit Answer time left... 1: 26: 57 2. [-/12 Points] DETAILS MY NOTES BBUNDERSTAT13 7.2.018.S. Do you want to own
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Problem 4. Two packages are going to be delivered within the next one hour, one red and one blue. Let X be the arrival time of the red package, and let Y be the arrival time of the blue package. Suppose X,Y are jointly uniform on the region D={(z,y) eR*:2
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1- Caminas por las maanas? 2- A qu hora es tu primera clase? 3- Estudias en la biblioteca? 4- Trabajas o estudias? 5- A qu hora llegas a casa?, Miras la tele? 6- Cul es tu clase preferida?, Qu tal el profesor o la profesora? 7- A qu hora terminan tus clases los lunes? 8- Cuntas horas estudias para una prueba? 9- Qu das descansas? 10- A qu hora

1. Course success rates [ Select ] ["Confounding Variable", "Explanatory Variable", "Response Variable", "Treatment Group", "Control Group"]

Walking Activity: Parts 1 and 2 Walking Activity Part 1: Plan for a 30-minute walk at a favorite walking destination. Prior to your walk, record some information to have ready when you execute your walk. I. Measure the length of your walking stride. Write to share how you determined the length of your walking stride. 2. Write to share your
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