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Mathematics Questions and Answers February 04, 2022

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Math 009 Quiz 1 Fall 2016 Professor: Dr. Kate Bauer Name________________________________ Instructions: The quiz is worth 50 points. There are 10 problems, each worth 5 points. Your score on the quiz will be converted to a percentage and posted in your assignment folder with comments. This quiz allows open book and open notes, and you may take as

A company has just built a new factory to manufacture their widgets with a method they believe should be more efficient than their old method on a daily basis. To compare they recorded the number of widgets produced by the old factory for the last 7 days before it was shutdown and the first 7 days of the new factory's sum test. production. The
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The piston diameter of a certain hand pump is .5 inch. The quality control manager determines the standard deviation is .004 inch. The manager believes a recalibration will lower the variability. After recalibration, 25 random pistons are checked from the production line and found to have a standard deviation of .0025 inch. Was the recalibration

Observations: 1 2 3 4 5 6 x-values: 8.8, 7.9, 8.0, 8.4, 8.2, 8.0 y-values: 7.7, 7.3, 8.0, 8.9, 7.5, 7.8 do hypothesis testing to see if ud < 0 at the a=.025

Integrate tan2xcscxdx . Select one: a. secx+C b. cscx+C c. ln|sin3x|+C d. ln|sec3x|+C

Who Spends More? According to a recent study, when shopping online for luxury goods, men spend a mean of $2,401 as compared to women who spend a mean of $1,527. Suppose that the study on a sample of 600 men and 700 women and the sample standard deviation of the amount spent was $1,200 for men and $1,000 for women. At the 0.01 level of

= Y| LABOS_Instructionspdf lab_06.pdf P IS TR S Alltools Edit Convert ESign I a ey Question 1 [14 Points] Books at a library can be rated 1 star, 2 stars, 3 stars, or 4 stars, all with an equally likely chance. Assume you borrow two books from this library and then check their ratings. a) [2 points] Write out the sample space of all outcomes of
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Which would be an appropriate statement to include in the participant section? Group of answer choices Participants in this study will be higher education administrators in public universities with more than five years of experience in the field. Participants in this study will be selected using purposeful sampling. 10-15 participants will be

17) For the event described below, which of the following represents the complement of the event. A sample of 425 software DVDs was selected. Fewer than 27 of these were defective. A) At least 27 DVDs were defective. B) At most 27 DVDs were not defective. C) More than 27 DVDs were not defective. D) Fewer than 27 DVDs were not defective. ID:
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You want to control the _______ when multiple comparisons are being made? a. test-retest error rate b. familywise error rate c. probability error rate d. significance error rate

why should you be dubious of the statistical results? Were you consistent with others in gathering the data, and what could be done to improve this sort of observational data gathering?

De las siguientes opciones, selecciona la que corresponde a un tema para debate. A. Los tipos de altares para el da de muertos. B. La privacidad en redes sociales. C. El HO como frmula qumica del agua. D. Las diferentes tipos de flores que crecen en primavera

Which of the following is or are (a) measure(s) of central tendency? Group of answer choices mode all of the other options are correct mean median

2 The graph above shows the function f(x). The graph below shows g(x). N g(x) is a transformation of f(x) where g(x) = Af(Bx) where: A = B =
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The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during peak rush hour periods of eight minutes ("2012 annual report," 2012). a.) State the random variable. b.) Find the height of this uniform distribution. c.) Find the probability of waiting between four and ve minutes. d.) Find
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Hello, I am a student new to Statistics and survey sampling. My project requires me to design the background and objectives of the project and apply statistical methodologies to analyze the given excel dataset. The dataset, including a series of students information like gender, age, monthly income, height, etc. Project Questions :Based on the
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Access the following article: Donnon, T., Paolucci, E. O., & Violato, C. (2007). https://internationalgme.org/Resources/Pubs/Donnon%20et%20al%20%282007%29%20Acad%20Med.pdfLinks to an external site. Academic Medicine, 82 (1), 100-106. Read the article and then respond to the following prompts in a word document. Comment on the reliability and

When we do regressions using time series variables, it is most common to have independent errors or residuals. Group of answer choices True False

Which of the following is a normal part of aging for the older adult? Frequent problems finding the right word Misplacing an item occasionally Losing track of the date or year Putting objects in unusual places

Is this correct - Error Bar Plot: Research Question 1 Chart: 1

Assume that X follows a continuous uniform distribution on the interval [2, 12]. Find the 90th percentile ofX. In other words, find a numberP90 such thatP[XP90]=0.90 . Provide an exact answer. Question 3 Assume that X follows a continuous uniform distribution on the interval [2.6, 8.9]. Find E [ X ]. Provide an exact answer. Question 4 Assume that

Which of these is an example of a blind experiment? a.) Asking a group of students to compare the tastes of O different brands of potato chips without revealing the names of the brands b.) Asking a group of students about their favorite sports O from a list containing names of 10 sports c.) Asking a group of students about the candidate they will

Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 19. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 81 and 119? (b) What percentage of people has an IQ score less than 81 or greater than 119? (c) What percentage of people has an IQ score

Let X1, X2, X3,.....Xn be independent and identically distributed random variables with the following probability density function: (Function showa in Screenshot). \f\f\f
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Analysis of variance is designed to compare _____________________________ simultaneously. Group of answer choices some sample means all sample medians all sample ranges all sample means

Astudent receives the following grades, with an A worth 4 points, a B worth 3 points, a C worth 2 points, and a D worth 1 point. What is the student's weighted mean grade point score? B in 2 two-credit classes D in 1 two-credit class A in 1 three-credit class C in 1 three-credit class Mean grade point score is??

1.The dean at a large university in California wonders if students at the university study less than the 1961 national average of 24 hours per week. She randomly selects 35 student and asks their average study time per week in hours. From their responses she calculates a sample mean of 16.37 hours and a sample standard deviation of 7.22 hours. At

What does this mean in lame terms? Samples that contain ,50% of probes above background, or that have imaging or positive con- trol linearity flags, were excluded from further analysis. Probes that have raw counts below background in all sample groups were excluded from differential expression analysis to avoid false positive results

Please see the pictures below for the question details. Note, that there are a total of 3 questions, but they are a part of the same problem. Please show your work. A. Problem 9. Find a general antiderivative for each of the following functions: (A) (5 pts) f(2) = 25/3\f\f
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Compute the (sample) variance and standard deviation of the data sample. (Round your answers to two decimal places.) 3.2,5.4,3.7,0.7,0.7 variance standard deviation

Lea cuidadosamente e indique el tipo de verbo: Partieron juntos a Mxico y nunca regresaron. verbo transitivo verbo intransitivo verbo ditransitivo

The distribution of leaves falling from trees in the month of November is positively skewed. This means that: Group of answer choices most leaves fall early in the month, with a few falling later in the month most leaves fall late in the month, with a few falling earlier in the month most leaves fall in the middle of the month, with a few falling

if 00 which ensures the above implication is true. 8= b. If /=10000 , find the largest value for 8>0 which ensures the above implication is true. c. Using the work you did in parts a. and b., find the largest value for 8>0 which ensures the above implication is true for an arbitrary />0 . (Your answer should be an expression involving N d. The
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What would the MSE, MAD, and MAPE % be for both 3-period moving average and 5-period moving average

Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $55,000. The population standard deviation is known to be $2,500. What is the 95% confidence interval for the mean salary of all graduates from the English Department?

What is the mean and the median of this dot plot Question 1 0/3 pts ' 99 0 Details The February 2011 issue of Consumer Reports magazine reported the results of consumer testing on folding exercise treadmills. The treadmills were rated on features such as ease of use, construction, user safety, and whether a heart rate monitor was included. The
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Please help with this practice question. [hi Consider the pairwise differences it; - Hm pg p5 . and pic - #3.. Find a point estimate of and a Tukey simultaneous 95 percent condence intenral for each pairwise difference. Interpret the results in practical terms. Which bottle design maximizes mean daily sales? {Round your answers to 2 decimal
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I am doing a histogram for the magnitude and depths of earthquakes located in statdisk. I believe that I plotted the histogram correctly but I am not sure if I am putting in the correct frequency, relative frequency, or cumulative frequency according to the chart. There are no heights for 25 through 30 according to my histogram so I want to make

When annotating, or writing a summary of a section in the book, which of the following would you not likely do? ANSWER Unselected Write in the margins of the pages. Unselected Include additional material from the reading that you did not originally highlight. Unselected Base the annotations on what was previously highlighted. Unselected Use

I have no idea how to solve this problem. Please help! x Your answer is incorrect. Try again. We are given that y = f (x) with f (1) = 3 and f' (1) = 5. Enter the exact answers. Enclose numerators and denominators in parentheses. For example, (a - b)/ (1 + n) (a) Find g' (1) if g (x) = Vf (x). g (1) = sqrt(5) (b) Find h' (1) if h (x) = f (Vx). h
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1) Articulate a research question (or questions) relevant to the statistical test. 2) Articulate the null hypothesis and alternative hypothesis for the research question(s). 3) Specify the alpha level
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b) (3 points) (Circle only one) Which of the following measure is least affected by outliers? i) Mean ii) Standard deviation iii) Interquartile range iv) Range
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(a) [1 pt] Researchers want to compare the effectiveness of two different types of exercise programs on weight loss. Fifty participants interested in losing weight are paired based on similar characteristics such as age, gender, and initial weight. Within each pair, one participant is randomly assigned to Exercise Program A and the other to

A survey of 471 citizens found that 382 of them favor a new bill introduced by the city. I need to find a 95% confidence interval for the true proportion of the population who favor the bill. What is the lower limit of the interval?

A marketing director is going to test whether the latest policy change has reduced product returns from 23 units per week. He believes the population is normally distributed, and the standard deviation is known. If he is using an alpha of 0.10, the z value he should look up in the normal distribution table is which of the following? Question 5

Descriptive Statistics: Variable n Mean Std. Dev. Min. Q1 Median Q3 Max. response 144 10.63 2.43 6.30 8.95 10.10 12.12 20.50 explanatory 144 2.724 0.485 2.000 2.300 2.700 3.025 3.900 Regression Equation: Parameter Estimate Intercept -0.3567 Slope (explanatory) 4.034 Model Summary: Statistic Value Correlation Coefficient r 0.804 Coefficient of

I just want to see If I'm on the correct track with my statement good Regidualsdeex . Word \"JESSIEINIEIEH E Home lnsen Design layout Reieienee; Mailing; Reuiew View Help }:'Tellmewhatymlwamtudn " CU'. . - ~ Dnnd - + DEE], T'WESNEWR\"1Z ' A A N\" '1' AaBbCEDd AaBbCEDd AaBbQ AaBchE A35 AaBchD AuBchDd AuBchDd AaBchDd AaBchD: ah Replace l - ,OLly '
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a webassign.net/web/Student/Assignment-Responses/randomize?pos=70&dep=274226 O scalene (c) Consider the following in in Find the value of x in the triangle Classify the triangle in as many ways as possible. (Select all that apply.) D acute equiangular O equilateral O isosceles obtuse right O scalene (d) Consider the following Find the value of x
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Select the answer that is False. Question 5 options: The Mean of a data set is affected by outliers. Bar charts are excellent for a large number of Categories. The Standard Deviation of a data set is not affected by outliers. The Variance of a data set is affected by outliers

Rolling a Die If a die is rolled one time, find these probabilities. Getting a number greater than 0 and an even number

JESTION 2 5 points Save A pose a researcher is interested in the percentage of Kentucky coal miners who have developed lung disease during the course of ir career and would like to calculate a 90% confidence interval. The researcher takes a simple random sample of 250 coal miners m Kentucky and finds that 175 have had lung disease during the

Pax World Balanced is a highly respected, socially responsible mutual fund of stocks and bonds. Vanguard Balanced Index is another highly regarded fund that represents the entire U.S. stock and bond market (an index fund). The mean and standard deviation of annualized percent returns are shown below. The annualized mean and standard deviation are

Lidia trabaja ms de 10 horas al da ya que su jefa siempre le dice que no puede dejar pendientes. Qu derecho no est respetando la jefa de Lidia? a. Derecho a un trabajo decente b. Derecho a una remuneracin suficiente c. Derecho a una jornada laboral mxima de 8 horas d. Derecho a la salud

Two of the assumptions of linear programming are non-negativity and certainty. What do these assumptions mean, why are they necessary, and how reasonable are these assumptions

Individuals filing the Zambia Revenue Authority income tax returns prior to March 31 had an average refund of K1056. Consider the population of last minute filers who mail their returns during the last 5 days of the income tax period (typically April 10 to April 15) I. A researcher suggests that one of the reasons individuals wait until the last 5

Hints: First notice that the study involves a "Yes or No" question. You are interested in finding a confidence interval for a proportion here. In your calculator go to STAT then TESTS. Then scroll down until you find 1-PropZInt. x represents the number of successes and n represents the sample size. Here's how to interpret the confidence level. If

A contractor is considering a project that promises a profit of $22,802 with a probability of 0.74. The contractor would lose (due to bad weather, strikes, and such) of $3,639 if the project fails. What is the expected profit? Round to the nearest cent.

content area top Part 1 A bank offers a CD that pays a simple interest rate of 2.5%. How much must you put in this CD now in order to have $2000 for a graduation trip in 6 years

Cyberlab: A new business opportunity for PRICO (A). Can anyone provide those questions 1.Executive summary, 2.Decision problem, 3. Analysis of the industry and the company, 4. possible decision alternatives, 5.Evaluation of alternatives - both qualitative and quantitative, 6.Recommendations.

1. What is the formula for finding a permutation? 2. Find the number of permutations possible using 8 different objects taken 3 at a time. Let's say there are six numbers: 1, 2, 3, 4, 5, 6: 3. How many permutations of the six digits can arise if they are taken three at a time? 4. How many permutations of the six digits can arise if they are taken

A correlation of .5 would produce a scatterplot in which the slope : Select one: a. Is vertical b. Is flat (horizontal) c. Is upwards (from the bottom left corner to the top right corner of the graph) d. Is downwards (from the bottom right corner to the top left corner of the graph)

The 'risk score' in the context of a risk matrix is defined as: Select one of the following The score given to a particular event or risk, resulting from the intersection of likelihood v consequence The score given if the consequence of an event occurring is assessed to be 'catastrophic' The score given if the likelihood of an event occurring is

9. (Level 1) Suppose we have a jar with 4 red distin- guishable marbles (e.g we number them as 1, 2, 3, and 4) and 6 blue indistinguishable marbles, and we draw one marble out. (a) What is the total num- ber of possible outcomes? (b) What is the sample space? (c) What is the probability of drawing a red one?

You collect a random sample of 28 adult golfers and record two scores for each: one taken before the subject receives professional coaching and one taken after. What test statistic should you use in a significance test for the difference between the before-coaching scores and the after-coaching scores

A coefficient of determination is the ____________ Question 8 options: a) proportion of the variation in the dependent variable that is explained by the independent variable b) proportion of the variation in the independent variable that is explained by the dependent variable c) percentage of change in one variable as explained by the other

Please help \\v\" 1. Graph each of the following functions: g[x)=m+l 2. A group of three restaurant patrons order the same meal and drink and leave an 18% tip. Determine functions that represent the cost of a. all of the meals before tip. 2a b. one patron's meal with tip. 2b c. for all the meals including tip. 2: 3. Given f(x) =2x2 -5x+ 1 and g(x)
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A research lab grows a type of bacterium in culture in a circular region. The radius of the circle, measured in centimeters, is given by, where is time measured in hours passed since a circle of a 1cm radius of the bacterium was put into the culture. Express the area, , of the bacteria as a function of time, and find the approximate area of the

I'm stuck on this question please help: DATA contains Part Quality data of three Suppliers. At =0.05, does Part Quality depend on supplier, or should the cheapest Supplier be chosen? Part Quality Supplies Good Minor DefectMajorDefect A 100 58 B160 224 C150 711 Choose your answer from the following: a) The assumption of independence of Part Quality

MPH 511: A study is conducted in patients with HIV. The primary outcome is DC4 cell count, which is a measure of the stage of the disease. Lower DC4 counts are associated with advance of disease. The investigators are interested in the association between vitamins and mineral supplements and CD4 counts. A multiple regression is analysis is

Which of the following statistics is a measure of central tendency? Question 28 options: a) Median b) Range c) Standard deviation d) Variance e) None of the above

Post a link to and a description of the meme, cartoon, or social media post you found. Be sure to only post the link to the meme, cartoon, or social media post and not upload the actual image. Explain what this meme, cartoon, or social media post conveys about one or more statistical concept(s). Bold the concept(s) so we can easily identify them.

For this test, your Z(critical) = 1.96. Sample 1 is men (n = 1,892), and sample 2 is women (n = 3,128). Tracking the sample group is important for interpreting results. If the result is positive, sample group 1 has more eating disorders. If negative, sample group 2 has more eating disorders. Your Z(obtained) = -3.75. In this case, the null

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in 1993, there were 41,598 shopping centers in a certain country. In 2003 there were 48,755 Write an equation expressing the number y of shopping centers in terms of the number x of years after 1993 When will the number of shopping centers reach 80,000? (a) The equation is y= __x + __ (Type integers ordecimals.) (b) The number of shopping centers

Find the equation for the horizontal asymptote of the graph of the function. (If an answer does not exist, enter DNE.) f ( x ) = 2 x 2 6 x 9 14 x 6 x 2 Find the indicated one-sided limit, if it exists. (If an answer does not exist, enter DNE.) lim 3+ x x 7 + 7 x

Muscle strength declines as we grow old. Preliminary evidence suggests that part of this loss of muscle strength may be due to a deficiency of chemical X. Investigators plan a randomized trial to administer chemical X or identical placebo for 5 months to elderly subjects and then measure muscle strength. Previous studies report a mean grip

Consider drawing a random sample of size n = 100 of a random variable X that has a Bernoulli distribution with probability of success p = .75. (a) What is P(p .80)? You may use an approximation to calculate this probability. Why it the approximation valid? (b) What is P(p .70)? You may use an approximation to calculate this probability (c) Use any

48. [-/0.13 Points] DETAILS LARMPMT1 10.1.024. 0/100 Submissions Used (a) Consider the following Find the value of x In the triangle. Classify the triangle in as many ways as possible. (Select all that apply.) O acute O equiangular O equilateral isosceles D obtuse O right Q scalene (b) Consider the following. Find the value of x in the triangle. X
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Please give step by step explanations. Question 47 (4 points) Whitefish have lengths that vary according to a normal distribution. We want to see if there is any evidence that the population mean length is not 9cm. A simple random sample of 10 Whitefish has sample mean length 8.5cm and sample standard deviation 1.2cm. Let denote the mean length of

Suppose the heights of 18-year-old men are approximately normally distributed , with mean 65 inches and standard deviation 4 inches. (a) the probability that an 18-year-old man selected at random is between64and66inches tall? (b) If a random sample ofsixteen18-year-old men would be picked, what is the probability that the mean height x is

Some shrubs have the useful ability to resprout from their roots after their tops are destroyed. Fire is a particular threat to shrubs in dry climates, as it can injure the roots as well as destroy the aboveground material. One study of resprouting took place in a dry area of Mexico. The investigation clipped the tops of samples of several species

En un grupo de 20 estudiantes se observa el nmero de veces que cada alumno necesita repetir la tabla para poder aprender a multiplicar con la tabla del 6. Los resultados fueron: 5, 8, 3, 9, 6, 7, 10, 6, 7, 4, 6, 9, 5, 6, 7, 9, 4, 6, 8, 6 Calcula la moda

Two candidates are running for office. A recent political poll of a random sample of 1000 voters indicated that 45% would vote for Candidate A and 42% would vote for Candidate B. If the margin of error is 3%, what is the correct conclusion regarding the two candidates' standings in the polls? Group of answer choices Candidate A is definitely in

Consider the following function: x(t) = {[0 for t - 2] , [ - 4 - 2t for - 2 t 0] , [ - 4 3t for 0 t 4] , [16 - 2t for 4 t 8] , [0 for t 8]} a ) Sketch the function x(t) b ) Sketch the function 3x(t 1) c ) Sketch the function ( 1 2 ) (3t) d ) Sketch the function - 2x( t - 1 2 ) e ) Sketch the function x( - 2t 1)

3(a) Prove that if a E C [2,3], then 3xo E [2,3] such that w a(x)ax = =in (16) a(x0). 2 (b) Determine whether or not each of the following sequences of functions is uniformly convergent: (i) The sequence {n} defined by f. (x) e -n2x3 n2+sin2x (ZZ-) = XA n3+3nx (ii) The sequence {gn} defined by gn (x) = 4n3te-x2 13, 2 , x E (- 2,2)
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33. [-/0.13 Points] DETAILS LARMPMT1 17.4.006. 0/100 Submissions Used Make a box-and-whisker plot for the data. (a) Quiz scores: 9, 13, 10, 11, 13, 9, 6, 10, 11, 9, 10, 12 Quiz scores 4 5 6 7 8 9 10 11 12 13 14 15 16 Quiz scores 4 5 6 7 8 9 10 11 12 13 14 15 16 4 5 6 7 8 9 10 11 12 13 14 15 16 Quiz scores - Quiz scores 4 5 6 7 8 9 10 11 12 13 14
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question 24 PLEASE SEND ME A PICTURE OF YOUR RESPONSE The data in the table represent the number of licensed drivers in various age groups and the number of fatal accidents within the age group by gender. Complete parts (a) through (c) below Click the icon to view the data table (a) Find the least-squares regression line for males treating the
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1.The mean systolic blood pressure for the population of school teachers in Florida is 156 mm. This is observed in the end of the school year. The mean blood pressure for a sample of school teachers in Orlando is 161 mm. Assume that the Orlando results are based on a sample of 50 teachers. The population standard deviation is known to be 15 mm.

A group of gamers get together to play and rate games. The mean rating for a new game is 87 out of 100 points. The standard deviation of the ratings in this sample is 12 points. A new member of the game group gives this particular game a rating of 67. The z-score for this rating is A . The z-score determines that the rating for this game is B .

Question 5. Consider a family with a mother, father, and two children. Consider the following set of events: A1 = {mother has influenza} A2 = {father has influenza} A3 = {first child has influenza} A4 = {second child has influenza} B = {at least one child has influenza} C = {at least one parent has influenza} D = {at least one family member has

I cannot figure out how to do parts b) and c) in excel; what numbers do I plug in etc. (steps). Tire pressure monitoring systems (TPMS) warn the driver when the tire pressure of the vehicle is 27% below the target pressure. Suppose the target tire pressure of a certain car is 31 psi (pounds per square inch.) (a) At what psi will the TPMS trigger a

A researcher was interested in the anxiety present in students just prior to the midterm exam. The researcher used an anxiety self-quiz to gauge the student's anxiety. The score for 30 students are given here. 69 99 91 66 70 98 70 53 40 58 61 66 94 77 70 56 88 85 86 40 84 86 54 48 86 43 78 53 79 89 1.Construct a frequency table with class,

An equation of a parabola is given. (x+3) 2 =6(y-1) a) Find the focus, directrix, and focal diameter of the parabola. b) Sketch a graph of the parabola and itsdirectrix

Given the demand and supply function of x between 2010 and 2025 is estimated to be; D(t) = 0.005t 2 + 0.15t + 2 (0 < t < 15) S(t) = - 0.01t 2 + 0.25t + 1 (0 < t < 15) Where D(t) and S(t) are measured in million and t = 0 corresponds to the year 2010. a) If A(t) is the gap between the demand and supply of x over the period in question. Find the

Suppose the random variable X follows a normal distribution with a mean of 50 and a standard deviation of 10. If a random sample of n = 20 observations are taken from the population, then is the distribution of x normal?

ANOVA is a way to look at differences between groups of responses (nominal data) measured on interval and ratio scales. We know interval scale is numerical where distance between numbers are equal (for example rate your feelings about this class on a scale from 1-10) and ratio scales have an absolute zero point. What is an example of ANOVA?

When a new medication is being tested for the treatment of cholesterol in the blood, what is the variable type in the new medication as it relates to the study? Group of answer choices Explanatory Variable Response Variable Bias Variable Lurking Variable\\

What is necessary for data to be considered "reliable"? O It must be incorporated into daily teaching. It must be refereed by a panel of independent peers for publications. O It must be approved by administrators in your district. O It must remain relatively constant when collected by different people at various points in time. O It must reflect

Let A = {6, 8, 10, 12} and B = positive even integers less than 15. Find the A' in B

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