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Mathematics Questions and Answers June 05, 2023

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On hot, sunny, summer days, Jane rents inner tubes by the river that runs through her town. Based on her past experience, she has assigned the following probability distribution to the number of tubes she will rent on a randomly selected day. x 25 50 75 100 Total P ( x ) .27 .44 .21 .08 1.00 Find the probability expressions P(x=50) P(x>50) P(x

11. If f ( x ) = x 6 x 2 and h 0, find the following and simplify. (a) f ( x + h ) = (b)f(x+h)-f(x)/h= 13. For f ( x ) = and g ( x ) = x 2 , find the following. (a) ( f + g )( x ) (b) ( f g )( x ) (c) ( f g )( x ) (d) ( f / g )( x ) , x 0

There is a study of interventions involved putting previously sedentary subjects onto exercise regimens, someone is interested in if there was an overall change in respiratory fitness from baseline to follow-up. What are the null and alternative hypotheses? \f
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9.1.2 Many high school students take the AP tests in different subject areas.In 2007, of the 144,796 students who took the biology exam 84,199 of them were female.In that same year, of the 211,693 students who took the calculus AB exam 102,598 of them were female ("AP exam scores," 2013).Estimate the difference in the proportion of female students

Kindly answer the following questions Quantitative Analysis & Decision Maki est: W5 Assignment 3 Quiz is Question: 4 pts 19 of 30 (12 complete The table below shows manufacturing hourly earnings for a region over a period of 8 months. Use Find the fo he Holt-Winters procedure with smoothing constants a = 0.5 and B= 0.6 to obtain forecasts for the
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Prof. Melkie is interested in examining student attitudes toward different study techniques. In the experiment, students in a large lecture class participate by using each of the different study techniques for each exam. Technique/Exam 1 is to study by reading each book chapter twice. Technique/Exam 2 is to study by watching every class lecture

1) A researcher was interested in how long students spend studying in a given week. They decided to ask 20 students to approximate how many hours they spend studying per week. The following data set reflects the number of hours each student reported studying per week

Question 7 course hero 2 pts We tested to see if women were more likely to do aerobics than men at the a = 0.02 level, and found a p-value of 0.0017. Which of the following is a correct interpretation? O With an a of 0.02, and a p-value of 0.0017, we reject the null and state that the averages are different With an a of 0.02, and a p-value of
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how to calcule the Copula correlation? Joint distribution for V1 and V2 V2 V1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.1 0.006 0.017 0.028 0.037 0.044 0.048 0.049 0.050 0.050 0.2 0.013 0.043 0.081 0.120 0.156 0.181 0.193 0.198 0.200 0.3 0.017 0.061 0.124 0.197 0.273 0.331 0.364 0.381 0.387 0.4 0.019 0.071 0.149 0.248 0.358 0.449 0.505 0.535 0.548 0.5
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the two factors are uncorrelated. Otherwise the assumptions of this model are the same as for the Index model discussed in the lecture. What is the variance of a risky stock in this two-factor model? How can you calculate the covariance between two stocks

The following 2 ions (Q55 to Q56) are based on the ing information: The CPI's at the start of each decade from 1940 to 1990 were: Year 1940 1950 1960 1970 1980 1990 CPI 140 241 296 388 824 130.7 Q55: What was the rate of inflation for the 1950s, as measured by the percentage change in the CPI? Q56: What was the rate of inflation for the 1970's, as
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Which of the following tools is best suited for visualizing the relative changes over time in the daily closing prices for two stocks? (1 Point) histogram pareto chart scatter diagram ogive frequency polygon none of the choices

Pregunta 50.4 pts La empresa La Reparadora es fabricante de productos electrnicos y contrat a Jefferson para que evaluara la rentabilidad de un nuevo celular. Los celulares tienen un precio aproximadamente de $1,000 y este nuevo celular tendra un costo variable unitario de $600; adems, hay que sealar que la empresa tiene costos fijos totales de

What are the equations of the vertical asymptotes of this function -3tan(1/2x)

A 47-foot length of wire is to be cut into 2 pieces so that the longer piece is seven feet longer than three times the shorter piece. Find the length of each piece by using the Guess-Check-Revise strategy outlined below. Make a guess for the length of the shorter piece. Use that guess and the fact that the total length is 47-foot feet to find the

Til is playing a game with his friend where they bet on coin flips. Til bet on Tails, but the last several flips have turned up Heads. He thinks, "I'm definitely due to win soon, so I'll keep betting on Tails!" What fallacy is demonstrated here? O Small number fallacy O Conjunction fallacy O Gambler's fallacy O Regression to the mean

1. In 2017, the per capita consumption of bottled of China was reported to be 25.46 gallons. Assume that the per capita consumption of China is approximately normally distributed with a mean of 25.46 gallons and a standard deviation of 8 gallons a) What is the probability that someone in the China consumed more than 33 gallons in 2017? b) What is
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Is achieving a basic skill level related to the location of the school? The results of a random sample of students by the location of school and the number of students achieving basic skill levels in three subjects is shown in the contingency table. At alpha equals 0.05, test the hypothesis that the variables are independent. Complete parts (a)

Indicate whether a vegan can eat the meals you're going to hear. 1. unos camarones 2. un sndwich de jamn y queso 3. lechuga y tomates 4. una chuleta de cerdo 5. un pollo asado 6. un melocotn y una naranja 7. una langosta 8. uvas y zanahorias 1. s no 2. s no 3. s no 4. s no 5. s no 6. s no 7. s no 8. s no

A test was given to a group of students. The grades and gender are summarized below A B C Total Male 13 12 8 33 Female 11 20 14 45 Total 24 32 22 78 If one student is chosen at random from those who took the test, Find the probability that the student was male GIVEN they got a 'C'. Round answer 4 places after the decimal if needed.

You work for a men's designer apparel company based in the U.S. that is planning to expand to the Netherlands. Your target market is young professional men in the age range 24-35. You conducted a survey of Dutch people that satisfies this criterion. The 95% confidence interval of the income of these Dutch people (converted to USD) is provided

I would you like you to run Monte Carlo Simulations that will help you understand more intuitively some of the concepts we are learning about in Linear Regression and hypothesis testing. Please have Excel pick a random number between 0 and 9 By dragging and copying, create 5 rows of two columns of random numbers. It should look like this, for

United States average. cach hospital is better, worse, or the sam Central Line-Associated Bloodstream Infections Actual Hospitals Cases Expected Cases SIR Lower Upper CI Brigham and CI 22 Women's Hospital 41.578 0.331 0.801 Tufts Medical 10 26.655 Center 0.18 0.69 Brigham and O 1.744 Women's Faulkner NA 2.115 Hospital New England 1 1.333 0.019
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determine the 68%, 95%, and 99.7% values of the empirical rule mean is 63.75 standard deviation is 7.56 what percentages is taller and shorter than 69 inches

A college professor is curious if the location of seat in class affects grades in the class. They are teaching in a lecture hall with 240 students. The lecture hall has 10 rows, so they split the rows into 5 sections - Rows 1-2, Rows 3-4, Rows 5-6, Rows 7-8, and Rows 9-10. At the end of the course, they determine the top 25% of grades in the

Volvo wants to estimate the variance of miles per gallon for its auto model XC 90. A random sample of 20 cars of this model showed that the variance of miles per gallon for these cars is 0.62. Test whether the sample result indicates that the population variance is different from 0.50 with the significance level, alpha = 0.05. Assume that the

State debt and per capita tax. an economics student wishes to see if there is a relationship between the amount of state debt per capita and the amount of tax per capita at state level. Based onn the following data can it be concluded that per capita state debt and per capita state taxes related. both amount are in dollars and represent five

Question 1 Consider the following statements: Evidence from Harvard University, located in the USA and widely acknowledged to be one of the world's "best" universities, suggests that the median GPA of undergraduate students is 3.7/4.0, or an A-. However, 20% of Harvard students disclosed that they had cheated on at least one assignment during the

The total salaries (X, in millions of pounds) and the number of points earned (Y) for the n = 20 English Premier League teams in 1995/6 are used to t a simple linear regression model. For this problem, we will treat this as a sample from a population of all possible league teams. Here are the matrices that we obtained from this data. , _ 20 170.9
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47 Determine the issue with the statistical evidence below. Statistical Evidence You want to hear students' general opinions about nightlife at WVU, so you ask five (5) students from each year in school. OUnrepresentative sample OInvalid data collection ONot enough cases OIncorrect sample population

Hypotheses for a test are given, as well as some information about the sample. Indicate where the randomization distribution will be centered. Hypotheses: Ho : H = 56vs Ha : HI>56 Sample: x = 59.4 The randomization distribution will be centered at i78 We flip a coin 130 times and get 78 heads, so the sample proportion of heads is p = 130 = 0.6. To
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Why would you use a surface or contour chart, rather than a heat map? to plot your data two-dimensionally to compare the means and medians in different data series to plot your data three-dimensionally to display your chart as a wireframe chart

Slide 9: Numerically Summarizing Data ph in Water: The acidity or alkalinity of a solution is measured using pH. A pH less than 7 is acidic; a pH greater than 7 is alkaline. The following data represent the pH in samples of bottled water and tap water. Tap 7.64 7.45 7.47 7.50 7.68 7.45 7.10 7.56 7.47 7.52 Bottled 5.15 5.09 5.26 5.20 5.02 5.28 5.26

In a large lecture hall of 94 students, there are 42 redheads, and 27 students who wear glasses. If 38 students are neither readheads nor wear glasses, then what is the probability that a randomly selected student will have red hair and wear glasses? 38/94 25/94 69/94 13/94

A dataset has a mean = 55.6 and a sample standard deviation S = 4.2 A. Calculate the test statistic for a sampling distribution of samples of size 24 for an observed value of x = 54.3 B. Calculate the percentage of data values that would be at that value or lower.

A number of restaurants feature a device that allows credit card users to swipe their cards at the table. It allows the user to specify a percentage or a dollar amount to leave as a tip. In an experiment to see how it works, a random sample of credit card users was drawn. Some paid the usual way, and some used the new device. The percent left as a

N nj studim eksperimental q ka pr qllim t shoh influencn e variablit X mbi variablin Y, A) Variabli X sht variabli i varur B) Variabli X sht variabli i pavarur C) Variabli Y sht variabli i pavarur D) Nuk ka variabla t pavarur dhe t varur

The nicotine content in a single cigarette of a particular brand has a distribution with mean 0.7 mg and standard deviation 0.1 mg. If 100 randomly selected cigarettes of this brand are analyzed, what is the probability that the resulting sample mean nicotine content will be less than 0.69? (Round your answers to four decimal places.) P()_r
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what is the media? Lmites Frequencia 40-42 2 43-45 14 46-48 9 49-51 18 52-54 9

D Question 2 Which line best fits the data shown in the scatter plot? 8 fy 4 - 2. -8 -4 -2 2 4 6 * -2- 6- O y=0.5x+2 O y=-0.5x +2 O y=2x+0.5 O y=0.5x-2e result for kr.., I Gmail * YouTube A Maps 2 | Question 3 ~ The table compares the gas mileage to the distance the car can travel on one tank of gas. Make a scatter plot of the data. Then tell
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Correlation is important for measuring test validity, or the ability of a test to measure what it is intended to measure. It is intuitive that the scores on the test and the construct need to be correlated, or related. Correlation also is used to measure test reliability. Test reliability includes the degree to which a test is consistent over time

First we review some basic concepts of rank. Recall that elementary matrix operations do not change a matrix's rank. Let A R mn and B R np . Let In denote the n n identity matrix. (a) Perform elementary row and column operations1 to transform In 0 0 AB to B In 0 A . (b) Let's find lower and upper bounds on rank(AB). Use part (a) to prove that rank

two tailed t-test has the test static 1.782, and is based on a sample size of 20 and a significance level of 0.01. What can be concluded? a.The claim is not supported. b.The null hypothesis is not rejected. c.The claim is supported. d.The null hypothesis is rejected. A hypothesis test had a test statics of -2.57.If this is a left tailed

8:07 0 = VE > Lesson 2 Practice v The following graph shows the value of a car t years after purchase. Depreciated Value of a Car 30000 25000 20000 Value of Car ($) 15000 10000 5000 5 10 15 20 25 Years Part A: Given the graph above, what is the independent variable? Do Reflect in ePortfolio Activity Details V You have viewed this topic AA
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The stacked line chart shows the value of each of Danny's investments. The stacked line chart contains three regions. The uppermost green-shaded region represents the value of Danny's investment in individual stocks. The center blue-shaded region represents the value of Danny's investment in mutual funds and the bottom region in black represents

The state is trying to build a rectangular picnic area with one of the longer sides bordering a lake. Fencing is needed for the three sides not bordering the lake. Let x (in feet) be the width (shorter side) of the picnic area and let y (in feet) be the area of the picnic area. The final goal of this project is to find the dimensions which will

im having trouble with part C. Please show work if possible. Thank You!!! Score: 0.42 of 1 pt 5 of 12 (12 complete) HW Score: 87.38%, 10.49 of 12 pts 8.1.19-T Question Help Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u = 127 days and standard deviation o = 12 days. Complete parts (a)
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We say f : R R has bounded gradients if for every x,y R |f(x)f(y)| L|xy| for some absolute constant L that does not depend on x or y. (the expression f is the derivative of f ). Now consider the function f (x) = |x 2|. Is this function convex? Explain why or why not. Does this function have bounded gradients (assume the gradient at the point x = 2

Consumer data reports that 50% of shoppers who enter a store on Black Friday end up making a purchase.In order to receive a bonus for their efforts, the marketing department of an electronics retailer must show that their stores have exceeded this proportion.A random sample of320Black Friday customers found that 176 of them ending up making a

Having trouble with part D. If possible please show your work. Thank You!!!! Homework: Section 8.1 Homework Save Score: 0.58 of 1 pt 5 of 12 (12 complete) HW Score: 89.53%, 10.74 of 12 pts x 8.1.19-T Question Help Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u = 127 days and standard
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What does it mean if there is a correlation of 0.67 (r=0.67) between exercising and grade point average? 67% of the variation in grade point average can be explained by exerising. We can not reject the null hypothesis and so exercising does not affect grade point average. There is a strong, postive relationship between exercising and grade point

1. In a 2 2 factorial ANOVA, there are two main factors and each factor has two levels. Furthermore, when analyzing the data from a 2 2 factorial design study, one of the objectives is to determine if there is any difference between the group means of each main factor. For example, in the weather knowledge study we examined the difference in group

A researcher conducted a study to estimate the mean resting respiratory rate among patients at an inpatient psychiatric Facility. They find a mean resting respiratory rate of 16 breaths per minute (BPM) and a 95% confidence interval for this mean of 4 BPM. Write an interpretation of this 95% confidence interval that is consistent with how we

analysis estimates the relationship of one variable with multiple variables that influence this one variable

The typical monthly home sales by a realtor at Drew County Hometown Realty are calculated to be up to a maximum of 9 new homes sold per month. The probability distribution for a single realtor of selling (x) houses in a month is demonstrated in the chart below. (x) Sales (0) (1) (2) (3) (4) (5) (6) (7) (8) (9) P f (x) 0.05 0.10 0.15 0.20 0.15 0.10

Scenario: The county of Los Angeles wants to get an idea of how residents feel about the quality of the transportation options in the county. In order to get the information, the County Department of Transportation uses records of vehicle registered in the county from the Department of Motor Vehicles to randomly select 1,000 residents of the
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SUBJECT: PH 521 Biostatistics RESEARCH QUESTION: Does vaping have greater harmful effects on the lungs than cigarette smoking in college students, ages 18-24, who have smoked over a year? Your instructor needs to approve your survey before you can distribute it to collect data. Your instructor will provide feedback, and you may need to resubmit

The average annual salary of major league baseball players in 2012 can be described by the numbers $1,155,000 and $3,590,000. Which one of these numbers is the mean and which is the median? Explain your reasoning.

Consider the following context: If f is defined from and g is defined from Then, which of the following is the correct definition for fog? Question 28Answer a. b. c. d.

Dinner dash is a company that specializes in food delivery timed just right. They define service time as late or not late. We assume that each delivery is independent of every other delivery. Historically, they have P (dinner is late) = 0.05. Find the probability that in the next 100 deliveries, exactly 10 are late

TRUE OR FALSE? The FRAX tool can be used to estimate the 10-year fracture risk in Black, White, Hispanic, and Asian men and women between the ages of 40 and 89, who are not currently (and who have not been) treated for osteoporosis. TRUE OR FALSE? The FRAX tool can be used to estimate the 10-year fracture risk in Black, White, Hispanic, and Asian

The table below shows the transactions for Sawyer Architecture Services during June. Greg Sawyer opened this business on June 1 with a capital investment of $77,000 (Transaction 1) Assets Liab. + Owner's Equity Accts. Accts. G. Sawyer, Transaction Cash Rec. Supp. Equip. Pay . Capital Rev. Exp . +77,000 +77, 900 - 9,200 +9, 200 +6, 200 +6, 200 +4,
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Isabel Briggs Myers was a pioneer in the study of personality types. The personality types are broadly defined according to four main preferences. Do married couples choose similar or different personality types in their mates? The following data give an indication. Similarities and Differences in a Random Sample of 375 Married Couples Number of

Los problemas educativos actuales, cuya presencia en los medios en estos ltimos meses es una buena medida de su intensidad, parecieran ser siempre los mismos: problemas de cobertura; problemas de calidad; de "gestin inadecuada"; de recursos insuficientes

Negotiations occur for several reasons: (1) to agree on how to share or divide a limited resource, such as land, property, or time; (2) to create something new that neither party could do alone; or (3) A) to resolve a problem or dispute between the parties B) to land an amazing deal C) to prove that one's negotiations skills and abilities are
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\f2019 71 Winning number of hot dogs in the hot dog eating contest Click here for the dataset associated with this question. Click here to access StatKey. 1nathansfamous.com. (a) Use StatKey or other technology to nd the mean and the standard deviation of the 18 numbers. Round your answers to 2 decimal places. Mean = a 61.56 hot dogs. Standard
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Get on the Gallup website at https://www.gallup.com/Search/Default.aspx?s=&p=1&q=polls&b= Links to an external site. Pick one of the articles (not a blog) on the Gallup website OR select an article listed below and discuss the measures of central tendency. In the article, scroll down and find the "survey methods" box and click the +. In your

Read each statement and write the infinitive form of the verbs conjugated in the present participle. 1. El maestro est explicando cmo hacer la multiplicacin en el saln de clase

3. Based on your study results, what percent of the study participants are shorter than you? What percent are taller than you? (Use the normal probability tab from the spreadsheet). 4. Post a screen shot of the normal distribution from the Week 5 Excel spreadsheet to support your answer above
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The following data contains daily air quality measurements in Lavender City from May to September 1973. The scatter plot below shows the relationship between the mean daily ozone level in parts per million and the maximum daily temperature in degrees Fahrenheit. ozone1.png You are also provided with some relevant R output. ozone2.png Question 9.1

Exercise 1 On average 26 people arrive per hour at a counter of a hypermarket. What is the probability that 23 customers arrive in 47 minutes? Exercise 2 Assuming that 6 in 10 automobile accidents are mainly due to a speed violation. What is the probability that among 8 automobiles, at least 4 will be mainly due to a speed violation? Exercise 3

Joint and Marginal Probabilities Use the following table to answer the questions below. For this table, let's say that a survey was sent out to 1000 people asking them to report their favorite animal and color. Dog Cat Fish Total Red 123 83 B 238 Blue 95 109 46 C Green A 38 12 306 Yellow 76 100 30 206 Total 550 330 120 1000 Q6. Find the values of
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ind the mean and standard deviation for each uniform continuous model. (Round "Mean" answers to 1 decimal place and "Standard deviation" answers to 4 decimal places.) Standard Deviation U0, 14) U(120, 240) U2, 93) Joan's finishing time for the Bolder Boulder 10K race was 1.71 standard deviations faster than the women's average for her age group.
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Suppose are running a study/poll about the probability of catching the flu this year. You randomly sample 108 people and find that 38 of them match the condition you are testing. H0: p=0.4 H1:p >0. Calculate the test statistic, rounded to 3 decimal places z=

ANCOVA Research Scenario: A church is operating a large substance abuse recovery program, and wants to know how they can be more effective in their work. Therefore, they hire a researcher to help them assess their effectiveness, and offer suggestions for improvements. Specifically, they want to know if different types of recovery training classes

Assume that the amounts of weight that male college students gain during their freshman year are normally distributed with a mean of p=1.1 kg and a standard deviation of 6 = 4.5 kg. Complete parts (a) through (c). a. If 1 male college student is randomly selected, find the probability that he gains between 0 kg and 3 kg during freshman year. The
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4) Suppose that at each birth having a girl is not as likely as having a boy. The probability for the number of boys in a 3-child family are approximated empirically from past records and are given in the table. What is the expected number of boys in a 3-child family? # of boys Probability P(X) 0.13 0.39 0.40 0.08
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Analysis Steps: Follow these steps to create a RapidMiner process (Hint: You could make a copy of the sample process "ToyotaCorolla Prediction Model Example v2.rmp" and modify it or you can create a process from scratch in a similar manner) 1. Import the data 2. Change "wine type" to a numeric data type. Use the red wine as the comparison group

How does the graph of f(x) = (x 9) 4 3 compare to the parent function g(x) = x 4 ? Question 2 (Essay Worth 10 points) (03.02 MC) How does the graph of f(x) = (x 9)* 3 compare to the parent function g(x) = x*
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control current opioid users former opioid users 400 645 314 359 408 405 408 479 524 418 488 304 256 492 344 1. What is the value of the F ratio? 2. What are the degrees of freedom for the F ratio for the ANOVA conducted? (Select all that apply). A. 1 B. 2 C. 4 D. 6 E. 8 F. 10 G. 12 3. Why are there two degrees of freedom for the ANOVA conducted

How does Lesson #12 describe secondary data in the context of research? a. They are primarily available through private archives. b. They are preexisting data collected for a different purpose. c. They are used to investigate the same research questions. d. They are always collected by the researcher.How is qualitative content analysis described

(Credit Scores LC} A borrower is curious about their credit score and knows the following four scenarios can have a negative or positive impact: I. Consistently making late payments M. Long credit history with specific card I\". Keeping a high balance on credit cards IV. Applying for many different credit cards Which scenario(s} will negatively
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Medical researchersare testing a new medication to see whether it increases the red blood cell counts in the body. The scientists divided patientsin half and gave half of the patients the new medication, while the other half were given a placebo. The following table shows the increase in percent of red blood cell counts in a 3-month period for a

#4: Calculate the volume in cubic yard (cy) between two end areas 100 feet (ft) apart. End area 1 (A1) equals 10.5 square feet (sf) and end area 2 (A2) equals 6 square feet (sf)

A categorical variable has three categories, with the frequencies of occurrence below. a. Compute the percentage of values in each category. b. What conclusions can you reach concerning the categories? Category Frequency A 13 11 26 a. Complete the table below. Category Frequency Percentage (%) A 13 13% B 11 22% 26 52% (Simplify your answers.) b.
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A seismologist takes a random same of earthquake depths and finds the following summary statistics. N=50 and C,=9.81 km. The seismologist wants to test the claim that these earthquakes are from a population with a mean depth equal to 10 km. Assuming that the population standard dev. Is 5.01 km.

A criminal justice researcher is interested in studying the relationship between the religious affiliation of offenders and sentence (in years) handed out. Here is the data she is working with: CatholicsProtestantsJewsMuslims 10101212 16101212 16161610 12131612 12131813 13121316 14121313 12181113 12111211 12121412 Calculate the F ratio.

Match each scenario below to the correct type of distribution. A study suggests that in dry climates, leaving your bed unmade may help reduce the prevalence of dust mites. They found that 37% of the population makes their bed each morning. A sample of 100 randomly selected adults is found and it is recorded whether or not they make their bed. What

The data set for question 4 is attached, please help . \f\f\f
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