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Mathematics Questions and Answers April 07, 2023

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The caller times at a customer service center has an exponential distribution with an average of 22seconds. Find the probability that a randomly selected call time will be less than 30seconds? (Round to 4 decimal places.) Answer:

Supposed that 45% of all babies born in a particular hospital are boy. If 8 babies born in the hospital are randomly selected, what is the probability that fewer than 2 of them are boys. Carry your intermediate computation to at least 2 decimal places

according to a college guide, selective means that the average SAT score of incoming freshmen is 600 with a standard deviation of 50. A high school guidance counsellor suspects that many colleges rated by the guide as selective do not meet the guide's standards. He randomly selects 30 colleges rated by the guide as selective. He then asks the

A restaurant offers a $12 dinner special that has 5 choices for an appetizer, 11 choices for an entre, and 3 choices for a dessert. How many different meals are available when you select an appetizer, an entre, and a dessert? A meal can be chosen in how many ways? (Type a whole number.)

Determine the total area under the standard normal curve in parts (a) through (c) below. (a) Find the area under the normal curve to the left of z = 3 plus the area under the normal curve to the right of z = 3. (Round to four decimal places asneeded.)

Describe the five steps in hypothesis testing. What is the difference between a one-sample test and a two-sample test?

Consider an x distributionwith standard deviation =45. (For each answer, enter an exact number.) (a)If specifications for a research project require the standard error of the correspondingdistributionto be5, how large does the sample size need to be? n = (b)If specifications for a research project require the standard error of the

How do you calculate the Sum of Squares , Variance, and Standard Deviation of these numbers? Number of nonfatal shooting vietimizations for persons by race, sex, and age of victims {known} Black White Age Male Female Male Female Under 20 86 13 14 2 20-29 132 24 24 7 30-39 66 12 25 5 40-49 48 9 16 4 50 and over 15 5 8 4
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Publishers of journals tend to only accept research articles that: a.demonstrate low probability for Type I or Type II Errors b.fail to reject the null hypothesis c.have statistically significant results d.are written in perfect APA style

When eighteen is reduced by one dash third of a number, the result is 16. Find the number

Find the sum of the infinite geometric series: -81, 27, -9, 3... s=a^1/1-r Group of answer choices -243/4 243/4 -243/2 243/2

In German Write out the date indicated to say when each person's birthday is. Questions Beispiel Angela Merkel hat am (17.) Example answersiebzehntenEnd example answer Juli Geburtstag. Question 1 with 1 blank Arnold Schwarzenegger hat am (30.) 1 of 1 Juli Geburtstag. Question 2 with 1 blank Heidi Klum hat am (1.) 1 of 1 Juni Geburtstag. Question 3

Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance.

I need answer Find the derivative of f (x) = -7tan (x). Enclose arguments of functions in parentheses. For example, sin (2x). f' (I) = -7sec* 2(X)
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Given the information: s 1 2 = 4, s 2 2 = 6, n 1 = 15, n 2 = 25, the number of degrees of freedom that should be used in the pooled-variance t test is: a.38 b.40 c.25 d.32 e.15

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What does it mean that variables must be systematically associated for causal inference? there is internal validity they covary one occurs before the other one is causing the other

help figuring these out? thank you! (homework question) IM- Construct a Venn diagram Let S and T be subsets of the universal set U as seen on the left. Use the data below to determine the number of elements in each of the FOUR basic regions and write that information in the diagram using the pencil tool. n(U) = 20, n(S) = 12, n(T) = 14, and n(S U
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3 A (A-G) For students with first names starting with the letters A to G. Assignments are graded out of a total of 60 points, and they are worth 9% of your total mark. Submit this assignment after you have completed Unit 4 of the course

Suppose the same students as above were asked to participate in a second study where, again, the time studied is recorded as well as the points achieved on the exam. There were, however, 14 students this time. The following values were calculated: SSR = 1475 and SSE = 864. Which range below contains the p-value? I got a F value of 21.74 now I need

el producto de esta matriz cual es:((-3&3@3&2)) ((-2&0@-1&2))

urgent, please help!!! 2) (15 points) Let X = (X1, X2, X3) be a jointly Gaussian random vector. The jointly Gaussian random variables X1, X2 and X3 have the joint Gaussian pdf as: fX1,X2,X3($1, 12, 13) (1) Suppose a new random vector is generated using relation Y = AX such that Y has uncorrelated compo- nents. [1/ V/2 1/ V/2 0 1/V2 -1/V2 0 (2) 0 0
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the average height of the tree after 2 years is 3 feet, and after 6 years the height of the tree is 15 feet. Assume that the annual growth of the tree is linear for 2t25. (a) Find the annual rate of change of the height of the tree in feet per year. (b) Find a function for the height h of the tree in feet as a function of time t in years. (c) Find

An executive in an engineering firm earns a monthly salary plus a Christmas bonus of $6500. If she earns a total of $80,900 per year, what is her monthly salary? $

How to conduct Statistical Analysis for my research on assessing the competencies and performance of subcontractors for a construction project delivery?

question shows below: You roll a die 10,000 times. Give the approximate probability that the roll is even at least 5,100 times. 0 t1) (1) O 1 e (3) 0 None of the other answers are correct 0 1
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QUESTION 14 Six different colored dice are rolled. Of interest is the number of dice that show a one. On average, how many dice would you expect to show a one? Find the probability that all six dice show a one
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A) The number of accidents per year on a given highway follows a Poisson distribution with = 50. If a new regulation decreases the average number of accidents on this highway by 10%, show, using the formulas for the expectation and the variance of a discrete random variable and the properties of the sums, what will be the new variance of the

On average, indoor cats live to 16 years old with a standard deviation of 2.5 years. Suppose that the distribution is normal. Let X = the age at death of a randomly selected indoor cat. Round answers to 4 decimal places where possible. a.What is the distribution of X? X ~ N(,) b. Find the probability that an indoor cat dies when it is between 16.9

Suppose that the Hong Kong Census and Statistics Department has just released the third quarter salary distribution as follows: What can we conclude? A)We are 95% confident that the proportion of HK employees that earn less than $30,000 is larger than 0.8 in 2012 3Q. B)We are 99% confident that the proportion of HK employees that earn less than

You have data points (Xk, Yk) and think they come from the linear relationship yk = a + bxk + k. where k: na are independent and N (0, ^ 2) -distributed with an unknown variance ^ 2 .If the data points are. (0, 2), (1, 2), (3, 8), (4, 9) estimate a and b and make a 95% symmetric confidence interval for b.

1. What is Business Finance? 2. What is Finance? 3. Why do we study business finance? 4. What are the 3 major function of business finance?

An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair for each of the four crashes were $437, $446, $497, and $234. Compute themean, median, and mode cost of repair. Compute the mean cost of repair. Select the correct choice belowand, ifnecessary, fill in the answer box choice. A. The mean cost of repair

This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was that the regular movie attendant enjoyed the movie with 8.3 points and a standard deviation of 0.5 points. What is the percent of people who gave the movie a rating between 6.8 and 8.8? (Write the number as a percent only

MATH 2080 Asignacion/Tarea 1.2: Problemas de aplicacion: puntos de equilibrio e ingresos, costos y ganancias (Valor: 35 puntos) (SET B) En la siguiente tarea encontraras cinco problemas en los cuales determinaras e interpretaras los puntos de equilibrio e ingresos, costos y ganandcias. Para cada una de las preguntas, aplica las propiedades de las

Sales of products in four different regions is tabulated for males and females. Find if male-female buyer rations are similar across regions
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Little help please. Not understanding because the logic of the answer for me is taken out. Coefficients Standard Error t Stat P-value Intercept 841 85.93 9.787 0.0000 Car Accidents 151.38 15.98 9.473 0.0000 (In last 3 years) Credit Score 92.51 10.23 -9.043 0.0000 Safety Rating -164.66 15.98 -10.304 0.0000 Does the sign of the coefficient for the
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5. 100 people need to be tested for a certain disease. The chance that a person has the for everyone independent of each other Instead of testing each person separately the
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The combining form ambly/o- means ________. "dimness" "lazy" "far" "near vision

analisis y reflexin del caso de la muerte de Joane Florvil

Read the following case study based on the Applegold Cider Company. You should then apply decision analysis to the problem facing Applegold. This will involve: a) Formulating the problem as a decision tree; b) using Bayesian analysis to update prior probabilities and find the correct probabilities in the tree; c) discuss the strengths and

A claim is made that the healthy adult human body temperatures is 98.6 degrees F. Suspecting this value has decreased in the last 10 years, we test using a sample of 400 such temperatures at a level of significance of 0.10. The p-value of the test turns out to be 0.035. Write a formal conclusion.

Use inductive reasoning to conjecture the rule that relates the number you selected to the final answer. Try to prove your conjecture using deductive reasoning. Select a number: Multiply by 9: Subtract 63 from the answer: Divide by 9: Subtract the original number

The following quadratic function is expressed in both its expanded and factored form below: f open parentheses x close parentheses equal 2 x to the power of 2 plus 7 x plus 3 equal open parentheses 2 x plus 1 close parentheses open parentheses x plus 3 close parentheses Choose the correct match for the coordinates of the x and y intercepts of f(x)

Teenagers signed up to be subjects in a psychology experiment. When they arrive, they are told that interviews are running late, and they are left waiting outside. The experimenters have placed a sign next to the entry door that says, "Do not open the door under any circumstances." Some subjects are outside alone and others are in pairs; these are

Hello. I was hoping to receive some help answering the following questions. Thank you: 1. X 1 , X 2 , and X 3 are potential predictor variables in a model used to predict Y. Use the SSE values below to answer SSE(X 1 ) = 510 SSE(X 1 , X 2 ) = 450 SSE(X 1 , X 2 , X 3 ) = 330 SSE(X 2 ) = 905 SSE(X 1 , X 3 ) = 400 SSE(X 3 ) = 720 SSE(X 2 , X 3 ) =

sert Format Arrange View Share Window Help 46% Thu Nov 21 5:10 Mail - Av . . . 7 3010_F19_Week13_Lab3 - Edited ~ ation 125% T o+ S bogle.com/sear View Zoom Insert Table Chart Text Shape Media Comment Share Tips Format Document 4 1 Highlight + Comment Highlight Track Changes U MUST SUBM 2A. Research question #1 BY HAND (8 pts.): U_1 17_VVCC nesters
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Question: In a population based study a total of 245 prevalent heart failure cases were identified on January 1, 2000. In the remaining study population ( n =7734), researchers identified 725 incident cases of heart failure. The study period was 7 years with a total of 50268 person-years of observation in total.Here is an additional table showing

I do not need the explanation, just checking over my answers so you can just list the answers!~ | Companies are trying to reduce sample sizes in order to speed decisions and reduce costs. Suppose samples of size 40 are taken instead of samples of size 60. Based on the characteristics of sampling distribution of means. which of the following
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A sample of 1100computer chips revealed that67% of the chips do not fail in the first1000 hours of their use. The company's promotional literature states that65% of the chips do not fail in the first1000 hours of their use. The quality control manager wants to test the claim that the actual percentage that do not fail is different from the stated

a person with an annual salary $ 57638 on a weekly basis. how much is gross earning

1 problem remains This Question: 1 pt 8 of 27 (0 complete) Use the normal distribution of SAT critical reading scores for which the mean is 515 and the standard deviation is 121. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 600? (b) If 1000 SAT verbal scores are randomly selected, about how
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According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg (Kuulasmaa, Hense & Tolonen, 1998). Assume that blood pressure is normally distributed. 6.3.4b Find the probability that a person in China has blood pressure of 135 mmHg or more. Show work and shade the graph on the
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Determine el rea del recinto limitado por el eje OX, las rectas verticales x=-pi/2 y x=pi/2, y la grfica de la funcin f(x)=x^(2)*sen(x)

The authors of your text caution when using reports of significance tests that the researcher should be aware of which of the following? a. that these do not represent tests of substantive significance b. that significance tests always show the relationship between the variables of interest c. that there is no relationship between the size of the

I need help on Customize for Education Sector: Task: Analyze the customer segments of an education provider and reflect on how you would customize for the segments. Think of an education provider. It could be pre-school, high school, graduate or post-graduate college, or any other. How would you segment its customers? How would you treat those

set III Instructions: i) When in doubt, round numeric responses to two decimal places ii) It is okay to discuss the course material with your peers, but please solve all the questions independently and write all your responses in your own words. On the coversheet, please write and sign the following honor pledge: "I pledge on my honor that I have

The line 8 x minus 4 y equals 7 correctly written in slope-intercept form is ___________. a.) y equals short dash 4 over 8 x plus 7 over 8 b.) y equals 2 x minus 7 over 4 c.) y equals short dash 2 x plus 7 over 4 d.) y equals 1 half x minus 7 over 8

A bag contains four $5 bills, three $10 bills, and one $20 bill. Three of the bills are drawn from the bag at random. If it is known that the total value of the drawn bill is $30, what is the probability that the $20 bill was drawn?

Please provide excel functions for excel A local dealership took a sample of cars that were recently traded in to determine the average length of time that customers tend to keep their cars. The results of the sample are below. Miles 85092 77202 116803 138114 89323 89341 59817 64090 69922 64342 88798 72069 63436 86813 74276 109465 53500 95774
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give me three ineqaulitys for an amusement park please with a domain

Pls help asap Consider a candy with 3 flavors; assume that you have a bag of this candy with many pieces of each. Imagine that you are on a strict diet that only allows you to eat 4 pieces of candy, and that to maximize your enjoyment of your treat, you will be eating this candy one piece at a time. Second, how many possible outcomes are there for
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The heights of ten-year-old males are normally distributed with a mean of 55.9 inches and a standard deviation of 5.7 inches. What is the probability that a ten-year-old male selected at random is taller than 58 inches?

Can someone help me with this? 2. Population inversion versus pumping in an "upper-level" three-level laser sys- tem. It is possible (though not likely in practice) to have a three-level laser system which is pumped on the 1 - 3 transition and in which ew laser action takes place on the 3 - 2 rather then the 2 - 1 transition (no such real system
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Can you help me with this questions? For the following functions a) Calculate the derivative function using the definition of derivative b) Evaluate the original function and its derivative at the indicated point c) In terms of the instantaneous rate of change of y with respect to x at x=a, explain the meaning of the result in part b) Funciones
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We'll examine the results of 2014-2015 SAT math exam with a mean of 501 and standard deviation of 117. What percentage of seniors scored lower than 300 on the math SAT

Benjamin owns a smalle Internet business besides himself he employs none other people their salaries earned by the employees are given below in thousands of dollars (Benjamin salary is the largest of course) complete part a through b below 25, 35, 45, 50,50,50, 55, 55, 60,75 Benjamin owns a small Internet business. Besides himself, he employs nine
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find the value of x for #13-16. For 17-20 please solve per instruction on document 13) 14) . (3x * 8)" (3x . BY (6x + 1)" 15) 16) *(3x + 6) 85' (6x + 1) 57" 17) Find myGFE if m ZGFE = 54x. 18) Find mzVML, if my NML = 920, L M (x + 68)7 ( * + 30) 1489 (29x + 2)" V F 19) If m/KLM = 180, find m/KLP 20) Find mZWVM if m/ WVU = 176. M M (x+ 111)" P (20x
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Question 1 THIS IS A TUTOR QUESTION ONLY AND I AM SEEKING HELP FOR SOLUTION. THIS IS NOT MY QUESTION NEED HELP WITH THE ENTIRE QUESTION.. CAN'T BREAK IT UP .. PLEASE The transcript below is obtained from a presentation titled "The surprising habits of original thinkers". You also can watch the video at the

Cuando la persona fallece, estando en perodo agnico, la Ley General de Salud de Mxico, en el artculo 344, establece para corroborar la muerte se realice un electroencefalograma o: Pregunta 5Respuesta a. Angiografa cerebral bilateral b. Prueba de Laborde c. Prueba de Lecha Marzo d. Prueba de Ambard y Bissemoret

please explain were you get the numbers to divide \f
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When you get a surprisingly low price on a product do you assume that you got a really good deal or that you bought a low-quality product? Research indicates that you are more likely to associate low price and low quality if someone else makes the purchase rather than yourself. In a similar study, n = 16 participants were asked to rate the quality

One particular morning, the length of time spent in the examination rooms is recorded for each patient seen by each physician at an orthopedic clinic. Time in Examination Rooms (minutes) Physician 1 |Physician 2 Physician 3 Physician 4 34 33 23 28 25 35 30 33 27 31 30 31 31 29 26 26 26 36 32 32 34 33 28 33 36 26 36 29 Perform an analysis with 0.01
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It seems all of the documents have different answers. I am testing a data set for number of defective units produced. The manager says "we produce no more than 7 defective units per week" Would I be correct in assuming that my null hypothesis is H (greater than or equal to) 7? or is the null hypothesis H (less than) 7. If my P value is 0.8954 does

The manager in charge of procurement at a firm wants to determine the expected mean demand for a particular stock-keeping unit (SKU) during the re-order lead time. This information is needed to plan for the timing of replenishment orders. The lead time for replenishment and the daily consumption during the lead time vary randomly; their

I really need help understanding how to work through these 2 homework questions, could someone please help me understand. Thanks. According to a report, the standard deviation of monthly cell phone bills was $49.97 three years ago. A researcher suspects that the standard deviation of monthly cell phone bills is different from today. (a) Determine
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Create an R script that first defines standardize_tibble() and then standardize (). In standardize (), replace mean () by a function center () and sd () by a function spread (), where center () and spread () are functions that you write to compute the mean and SD using only the sum () function. center () and spread () should remove missing values
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I need some help on answering this question . I am using Microsoft Excel and Word to answer it too. Thanks you ! ^_^ In a design study for a device to generate electricity from wave power at sea, experiments were carried out on scale models in a wave tank to establish how the choice of mooring method for the system affected the bending stress
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URGENT* please answer in order... Q10 Q11 Q12.. Question 10 1 pts A researcher would like to compare the toughness of three different types of metals: Zinc, iron and, Titanium. The researchergathers 25 equal sized pieces of each metal and places them into a controlled testing environment. Testing objects of equal weights (measured in kg) are
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Hanna Properties specializes in custom-home resale in the Equestrian estates, an exclusive subdivision in Phoenix, Arizona. A random sample of nine custom homes currently listed for sale provided the following information on size and price. Here x denotes size, in hundreds of square feet, rounded to the nearest hundred, and y denotes price, in

Consider the random sampleX1,...,X100 from a population with true mean=1 and with true variance^2=4. The approximate probability that the sample mean will be larger than1.5 is: A 0.7742 B None of the preceding C 0.00621 D 0.5 E 0.99379

I am trying to figure out why this interpretation is incorrect... "A group of researchers investigated the impact of every-other-dayfasting on weight loss in humans. After 22 days of every-other-day fasting, the researchers measured the amount of weight that was lost by each of 16 human subjects. These data were used to construct a 95% confidence

Explain in detail how you find a residual of a LSRL.

Calculate r for the set of data using any technology of your choice. Round values to the nearest hundredth. Interpret r, what type of correlation, if any, does the data have? Does the data show a positive or negative association? X 1.5 2 2.2 3.3 3.8 5 4.5 0.6 3.5 3 2.8 Use the paperclip button below to attach files
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I am not able to solve this question. Someone can please help to solve this question. Thank you HOPEWELL HOSPITAL: Beds = 100 Bassinets = 10 DATE: April 30 Bed Unit Starting Transfers Discharges Count Census Admissions In Out [live) Deaths Brooks, B. Cramer, C. 37 Medical Cooper, C. 34 Inman, J. 2 1 Morris, M. Dawson, D. Dawson, D Kingston, K.
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Set A contains 7 elements, set B contains 21 elements, and 6 elements are common to sets A and B. How many elements are in Upper A union Upper B? Question content area bottom Part 1 The number of elements in Upper A union Upper B is enter your response here

use the change of base formula to explain how we know that the graph of f(x)=log3x can be obtained by applying a transformation to the graph of g(x)=lnx

In a completely randomized experimental design involving five treatments, 13 observations were recorded for each of the five treatments (a total of 65 observations). Also, the design provided the following information. The number of degrees of freedom corresponding to within-treatments is SSTR = 200 (Sum of Squares Due to Treatments) SST = 800

Suppose there are 49 Skittlesin a bowl: 7 red, 7 yellow, 7 green, 7 Blue, 7 Orange, 7 white, 7 purple and that my favorite color is green. What is the probability of me getting 2green skittlesassuming that the first one is not replaced? What is the probability of me getting 2 greens skittlesthat the first one is replaced?

Questions on stats: QUESTION 1 A researcher is investigating a new financial awareness program, designed to reduce the amount of money people spend on credit cards. She randomly selects 20 people with credit cards to put through the program. She obtains the records of money spent in the year before the program, as well as the for this test? amount
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The accompanying frequency distribution represents the square footage of a random sample of 500 houses that are owner occupied year round. Approximate the mean and standard deviation square footage. LOADING... Click the icon to view the data table. Square footage: 04991 Frequency: 9 5009991, 13 1,0001,499 36 1,5001,999 121 2,0002,499 119

In this problem, assume that the distribution of differences is approximately normal. Note : For degrees of freedom d . f . not in the Student's t table, use the closest d . f . that is smaller . In some situations, this choice of d . f . may increase the P -value by a small amount and therefore produce a slightly more "conservative" answer. Are

2. A Survey has been administered to random samples drawn from Ontario and Quebec. Respondents were asked if they agree or disagree that \"individuals should not have to pay tuition to go to university\". On tarl a 18-34 35-54 55+ Total "people should not have to pay tuition" Strongly disagree 322 175 66 563 Disagree 631 650 570 1851 Agree 155 100
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a. Choose the most appropriate visualization to show the total attendance for the Cardinals from 2006 - 2014. What's their trend
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A report says that the average amount of time a 10-year-old American child spends playing outdoors per day is between 19.18 and 25.34 minutes. What is the margin of error in this report?

Which techniques would a lifeguard use to reach a passive submerged person who is at a moderate or deep depth?Select two answers. Feet-first surface dive Standing head-first dive Stride jump Head-first surface dive Compact jump

8. You did (or will do) this problem in section on 10/6 : FPP.16.A.4 and will now use R to the problem again: (a) A coin is tossed, and you win a dollar if there are more than 60% heads. Which is b or 100? Explain. (b) As in (a), but you win the dollar if there are more than 40% heads. (c) As in (a), but you win the dollar if there are between 40%
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Software filters rely heavily on "blacklists" (lists of known "phishing" URLs) to detect fraudulent e-mails. But such filters typically catch only 20 percent of phishing URLs. Jason receives 16 phishing e-mails. (a) What is the expected number that would be caught by such a filter? (Round your answer to 1 decimal place.) Expected number (b) What

Read the Z table that is in the back of your text. Show how you mathematically calculated each answer after you read the table. Making a sketch will help visualize the areas. All answers to four decimal places. a) P(Z b) P(Z c) P(Z > +1.18) = d) P(+1.0 \f
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A researcher wishes to estimate the proportion if adults who have high-speed internet access. What size sample should be obtained if she wishes the estimate to be 0.04 with 95% confidence if A) she uses a pervious estimate of 0.46? B) she does not use any prior estimates? Level of Confidence Area in Each Tail a over 2 Critical Value, z a over 2

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