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Mathematics Questions and Answers March 10, 2023

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Which expression is NOT equivalent to 32 x + 28 y ? [1] 4(8 x + 7 y ) [2] 4(5 x + 7 y + 3 x ) [3] 30(2 x - 2 y ) [4] 2(16 x + 14 y )

could you review this and tell me if i am correct...part B stumped me. The weights of ice cream cartons produced by a manufacturer are normally distributed with a mean weight of 10 ounces and standard deviation of 0.5 ounces. A) what is the probability that a randomly selected carton has a weight greater than 10.21 ounces? To find the probability

WEEK 8 PROBLEMS30 POINTS 15 points each. Place answers within the Word document below. 1. A study is conducted to estimate survival in patients following kidney transplant. Key factors that adversely affect success of the transplant include advanced age and diabetes. This study involves 25 participants who are 65 years of age and older and all

#75. Henry Chow is a stockbroker working for Merrill Lynch. He knows from past experience that there is a 70% chance that his new client will want to include U.S. equity in her portfolio and 50% chance that she will want to include foreign equity. There is also a 40% chance that she will want to include both U.S. equity and foreign equity in her

Look at the normal curve below, and find , + , and . = += =

A test of spelling ability is given to a random sample of 10 students before and after they complete a spelling course. The mean score before the course was 119.60 and after the course the mean score was 130.80. The standard deviation of the difference is 16.061. Calculate the p -value that corresponds to the test statistic to test the claim that

LetP(A) = 0.51,P(B) = 0.46, andP(AB) = 0.32. a. AreAandBindependent events? Yes becauseP(A|B) =P(A). Yes becauseP(AB) 0. No becauseP(A|B) P(A). No becauseP(AB) 0. b. AreAandBmutually exclusive events? Yes becauseP(A|B) =P(A). Yes becauseP(AB) 0. No becauseP(A|B) P(A). No becauseP(AB) 0. c. What is the probability that neitherAnorBtakes

Faith Marsh Mr. Ishiu MTH 151 3 November 2016 Writing Assignment: Problem 1. Let f(x) = x2. (i) For every a, nd an equation of the tangent line of y = f(x) at x = a. First, if x=a, then f(x) = f(a), and, by substitution into the original problem, f (a)= a2 . Then, the derivative can be found using power rule: f ' (a)=2 a . Substituting f ' (a) for

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IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. An individuals IQ score is found to be 90. Find the z-score corresponding to this value.

Statistic/ Math calculatethe range, variance, and standard deviation for the following samples: 6, 7, 1, 1, 4, 3, 4, Range___ Samplevariances s 2 _____ round two decimal place sample standard deviation s_____round two decimal point

A cosmetic company is planning the introduction of a new lipstick line. Its marketing research department has estimated that the demand for the new line will be given approximately by p = 5e^3x, x 0, selling x thousand lipsticks per week at a price of $p each. Estimate the maximum weekly revenue Rmax.

In one study of smokers who tried to quit smoking with nicotine patch therapy, 38 were smoking one year after the treatment, and 33 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after the treatment.

Researchers for a manufacturer of barometers (devices to measure atmospheric pressure) read each of 50 barometers at the same time of day. The mean of the readings is 30.3 (inches of mercury) with a standard deviation of 0.22inch, and the readings appear to be normally distributed. LOADING... Click the icon to view the table with standard scores

ITIS 1P97 WINTER 2016 ASSIGNMENT#1 Due Date: February 12, 2016 @12:00AM via Sakai; only one submission per group. INSTRUCTIONS: There are four problems in this assignment. You may use 'Excel' spreadsheet applications to solve the problems. If the answers to the questions need to be supported with written arguments or explanations you must do it in

what is the formula for an ideal gas and what does each variable mean? and what does it tell you?

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Given the following data: Year Vehicles 1940 32.4 1945 31 1950 49.2 1955 62.7 1960 73.9 1965 90.4 1970 108.4 1975 132.9 1980 155.8 1985 171.1 Since we will be using powers of 10 and logs, it is best to make the years smaller numbers (imagine taking 10 to the 1940th power). So for the x list, use 40, 45, 50, 55, etc to represent the years after

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The final exam scores listed below are fromonesection of MATH 200. How many scores were within one standard deviation of the mean? How many scores were within two standard deviations of the mean? 993486577385 919346 968879 688589

A .05 level of significance corresponds with a confidence interval of ------- %.

Test at =.05 and 0.10 the hypothesis that a majority (more than 50%) of students favor the plus/minus grading system at a university if in a random sample of 500 students, 265 favor the system?

if the numbers have been rounded to the nearest tenth of what the lowest and highest values 50 could (lower and upper limit)

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Question 1 A _____of a variable is the effect of the variable at a single level of another variable. Student Answer: Main effectSimple effect Interaction Levels Question 2) Which of the following descriptions of a main effect is correct? Student Answer: A main effect of an independent variable must have effect over at least one level of all other

Show that a coset xH has the same number of elements as H.

consider the data below on the number o carat of 8 diamonds complete part a though d 0.91 0.86 0.46 0.38 0,37 1.19 0.8 0.5 Find the range of the data set _____carats

a student scores 71 out of a 100 on a test. if the maximum score on the next test is also 100 points. what score is need to maintain at least an average of 82?

The average natural gas bill for a random sample of 16 homes in the 39805 zip code during the month of March was $248.25. Using historical data they estimate that the population standard deviation is $51.69. What is the margin of error of the 99% confidence interval for the average natural gas bill in this area ? (Use three decimal places)

The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic.(a) When Marco is sick, he tests the pH of his saliva and finds that it is 5.9. What is the hydrogen ion concentration of his saliva? (Round your answer to seven decimal places.)

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1: The region in the first octant bounded by the coordinate planes and the planes x+ z =1, y +2 z =2 Set up and evaluate six different triple integrals, each equivalent to the given problem. Problem 2: 2 2 Find the volume of the solid enclosed by the cone z= x + y and between the planes z=1 z=2 . Set up and evaluate the triple integral.

a milk company has four machines that fill gallon jugs of milk. The quality control manager is interested in determining whether the average fill for these machines is the same. The following data represent random samples of fill measures (in quarts) for 19 jugs of milk filled by the different machines. Using a significance level of 1%, develop an

write an equation. A basketball field house seats 15,000 people. Courtside seats sell for $9, end zone seats for $7, and balcony seats for $4. A sellout produces a total of $81,000. The number of courtside seats is 1000 more than the number of end zone seats. How many seats of each type are there? answer is: 3000 courtside, 2000 end zone, 10,000

. A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information. 52 43 30 38 30 42 12 46 39 37 34 46 32 18 41 5 a) Develop a stem-and-leaf chart. Above for tips on presenting Stem-Leaf plot. b) What basic conclusions can be drawn from this chart? c) Compute the 5 number

Month Microsoft Jan-03 -0.08201 Feb-03 0.00211 Mar-03 0.02152 Apr-03 0.05576 May-03 -0.03717 Jun-03 0.04185 Jul-03 0.03003 Aug-03 0.00417 Sep-03 0.04827 Oct-03 -0.05396 Nov-03 -0.01645 Dec-03 0.06457 Jan-04 0.01023 Feb-04 -0.04051 Mar-04 -0.06031 Apr-04 0.04813 May-04 0.00383 Jun-04 0.08883 Jul-04 -0.00245 Aug-04 -0.03896 Sep-04 0.01282 Oct-04

\fX P(x) 50,014,000 248,000 15,000 130 130 7 7 4 3 Mean: Column1 Mean Standard Error Median Mode Standard Deviation Sample Variance Kurtosis Skewness Range Minimum Maximum Sum Count X*P(x) 6.865E-009 0.343346 2.81239E-007 0.069747 0.000001734 0.026009 7.0283151E-005 0.009137 8.6215529E-005 0.011208 0.0034589 0.024212 0.0013441 0.009409 0.0078047

9. A dish contains three cherry candies, four lemon candies and five grape candies. If we randomly select two candies from the dish without replacement, what is the probability that we get one cherry candy and one grape candy? (A) 0.1042 (B) 0.1136 (C) 0.1628 (D) 0.2084 (E) 0.2272 10. In a game of poker, you are dealt five cards from a deck of 52

Name:______________ PMAN 639: PROJECT QUALITY MANAGEMENT FINAL EXAM A. Please answer the following True or False questions (each worth 2 points) 1) A process is capable if only common variation is present in the process. True ______ False______ 2) Due to the widespread acceptance of benchmarking, it is not difficult to obtain cooperation from

Find the minimum sample size n needed to estimate mu for the given values of c, sigma, and E. C=0.98, sigmaequals=6.5, and E=11 Assume that a preliminary sample has at least 30 members

In a certain noisy factory, workers are provided with earplugs and are expected to wear them. An industrial hygienist inspecting the plant found that 100 of the 500 workers in the factory were not wearing their earplugs because they regarded them as uncomfortable and a nuisance. When all the workers were given a hearing test, it was found that 4

Statistical Decisions Model It is clear from the material in this course that inferential statistics plays a critical role in research in the behavioral and social sciences. Since students in this class will further their education via coursework and research conducted via the practicum and dissertation processes, it is important to reflect on the

An article in the National Geographic News (February 24, 2005) reports that Americans are increasingly skimping on their sleep. A researcher wants to determine if Americans are sleeping less than the recommended 7 hours of sleep on weekdays. He takes a random sample of 150 Americans and computes the average sleep time of 6.7 hours on weekdays.

1 Select the graph of the quadratic function (x) = 4 - x2. Identify the vertex and axis of symmetry. Vertex: (0,4) Axis of symmetry: y-axis Vertex: (0,2) Axis of symmetry: y-axis Vertex: (0,5) Axis of symmetry: y-axis Vertex: (0,3) Axis of symmetry: y-axis QUESTION 2 Select the graph of the quadratic function (x) = x 2 + 3. Identify the vertex and

The ABC battery company claims that their batteries last at least 100 hours, on average. Your experience with their batteries has been somewhat different, so you decide to conduct a test to see if the company's claim is true. You believe that the mean life is actually less than the 100 hours the company claims. You decide to collect data on the

1 Select the correct description of right-hand and left-hand behavior of the graph of the polynomial function. Rises to the left, falls to the right Rises to the right, rises to the left Falls to the left, rises to the right Falls to the right Falls to the left, falls to the right QUESTION 2 Select the correct description of right-hand and

Degrees of freedom for the chi square test of goodness of fit is determined by?

Find the center, vertices, and foci of the ellipse with equation 4x 2 + 6y 2 = 24.

t_1_TRQ_BOX_RNF t_6_COWL_TOP_OTR t_7_COWL_TOP_INR t_7b_COWL_TOP_INR t_7c_COWL_TOP_INR t_7d_COWL_TOP_INR t_7e_COWL_TOP_INR t_7f_COWL_TOP_INR t_9_APL_BRKT_OTR t_10_HPL t_10b_HPL_RENF t_11_APL_BRKT_INR t_12_ROOF_RAIL_RR_CCab t_13_ROOF_RAIL_FR 2.928420292 1.3536920175 1.4284842164 1.7526735922 1.2067328799 1.3428397625 1.9785131666 1.519542917

Suppose the average puppy weighs 10 pounds. A sample of 10 puppies yields a sample mean of 13.2 pounds and a sample standard deviation of 2.78 pounds.Assume the population standard deviation is known to be 5.25.You want to test whether the sample mean differs from the population mean of 10 pounds at a 5 percent level of significance using a

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find an equation of the line that passes through (0,4) and is parallel to y=1/3x+5

If you have constructed your subsets correctly,your means should be mean ofNino.Temp 19.76553 ; Nina.Temp 18.92117 Set up a 2 Sample T-Test to test ifNinoTemperatures are warmer (greater) than Nina Temperatures. Assume a confidence level of 95 %. Assign the var.equal keyword argument based on your previous response. Is this a one-sided or

One main goal of statistics is to use non-complete information to draw a conclusion. Often (especially in economics) the conclusion from statistical analysis can trigger some specific policy response. In your response to this thread, think about an example in every day life when you use--or someone you observe uses--imperfect information/evidence

MATH-1311 - Brucks - Fall 2016 Name: ____________________________________________ Optimization Project Instructions: Answer all of the following on your own paper. Show all necessary work neatly, using proper notation, and box your answers. Unless otherwise noted, exact answers are expected, as opposed to decimal approximations. Students may

CONCORDIA UNIVERSITY Department of Economics ECON 221/2 SECTIONS A, B, C and DD STATISTICAL METHODS I FALL 2016 - ASSIGNMENT 1 Due: Monday, October 17, before 3:00 pm Name: I.D: Section: Points Total: 100 points 1. (16 points) Of the employees that work for Hapolonians Incorporated, 35 percent have an MBA and 40 percent are over the age of 35. Of

Identify and describe two (2) problems that can affect the results of a criterion-related validity study. Note: Please, no pasted answers, just elaborated answers.

For the following function, state it domain and create sign diagram:f(x) = xx 1

The belief is that the mean number of hours per week of part-time work of high school seniors in a city is 10.5 hours. Data from a simple random sample of 22 seniors indicated that their mean number of parttime work was 12.3 with a standard deviation of 1.3. Test whether these data cast doubt on the current belief. (use " = 0.05) Part a: State

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Exercise 4.4.2. (a) Is f(x) = 1/x uniformly continuous on (0, 1)? (b) Is g(x) = (x ^2 + 1) uniformly continuous on (0, 1)? (c) Is h(x) = x sin(1/x) uniformly continuous on (0, 1)? Exercise 4.4.3. Show that f(x) = 1/x 2 is uniformly continuous on the set [1,) but not on the set (0, 1]. Exercise 4.4.4. Decide whether each of the following statements

$FL2@(#) IBM SPSS STATISTICS MS Windows 22.0.0.0 ##########################Y@16 Nov 1616:18:49SPSS/PC+ ###########################GENDER ########################AGE ########################MARITAL ####MARITAL STATUS ########################ETHNIC ########################INCOME ########################TOTHELP ####tothelp

Suppose that 3% of all adults suffer from diabetes and that 32% of all adults are obese. Suppose also that 2% of all adults both are obese and suffer from diabetes. (a) Find the probability that a randomly chosen adult is obese, given that he or she suffers from diabetes. Round your answer to2decimal places. (b) Find the probability that a

4. (4 points) A high school with 1000 students offers two AP courses: Statistics and Calculus. There are 200 students in the Calculus class roster, and 180 students in the Statistics class roster. We also know that 100 students enroll in both courses. (a) (2 points) Find the probability that a randomly selected student takes neither AP course.

1. please go to the this website: https://portal.mypearson.com/login username: nawafking password: nalgul@317 2. select the course (BUSN5760) 3. in the course home select HWChs10and11 and you find one question answers and 9 not answered

According to government data, the probability that an adult was never in a museum is 15%. In a random survey of 10 adults, what is the probability that two or fewer were never in a museum? Round to the nearest ten-thousandth

1.In 2006, Merck released a vaccine named Gardasil for HPV - the most common cause of cervical cancer among young women. The company conducted four placebo controlled double blind clinical studies of women aged 16 to 26. The results were Treatment n Cervical cancer cases n Genital wart cases Gardasil 8487 0 7897 1 Placebo 8460 32 7899 91 (a): Give

To test the hypothesis in Exercise 1,the admissions counselors select a random sample of freshmen and compare their scores on the SAT to those of the population of upperclassmen. They find that the freshmen do in fact have a higher mean SAT score. However, what they are unaware of is that the sample of freshmen was not representative of all

Flip a coin 60 times. Record the outcome of each of the 60 flips in order from 1 to 60, using the Tally Sheet accompanying the Final Exam. Tally the number of heads and the number of tails and calculate the proportion of heads in your sample. Based on your sample result, calculate a 95% Confidence Interval for the true population value. C alculate

Health Care workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex allergy. Each in a sample of 42 hospital employees who were diagnosed with a latex allergy based on a skin-prick test reported on their exposure to latex gloves. Summary statistics for the number of latex gloves used per

1.One of the largest issues in ancient mathematics was accuracynobody had calculators that went out ten decimal places, and accuracy generally got worse as the numbers got larger. Why did trigonometry allow for some questions to be answered very accurately, even if the numbers involved were very large? 2.If the terminal side of a 330 degree angle

Gentle Ben is a Morgan horse at a Colorado dude ranch. Over the past 8 weeks, a veterinarian took the following glucose readings from this horse (in mg/100 ml). 95 87 83 106 99 108 85 89 The sample mean is x 94.0. Let x be a random variable representing glucose readings taken from Gentle Ben. We may assume that x has a normal distribution, and we

Details Conduct a literature search to locate research articles focused on a practice problem of interest. This literature search should include both quantitative and qualitative peer research articles to support your practice problem or issue of interest in 350-750 words. Identify six peer research articles which will be utilized through the next

Exam grades across all sections of introductory statistics at a large university are approximately normally distributed with a mean of and a standard deviation of . Use the normal distribution to answer the following questions. (a) What percent of students scored above an 88? (b) If the highest9% of students will be given a grade of A, what is the

The table below shows the distance y, in miles, traveled by a toy car in x minutes: 20 30 40 50 5 10 15 20 Part A: What is the most likely value of the correlation coefficient of the data in the table? Based on the correlation coefficient, describe the relationship between time and distance traveled by the toy car. (4 points) [Choose the value of

It is 4 multiple choice questions. I need the answers within the hour though if possible. Please do not pick up the questions if the time is not possible for you. Thank you so much! In order to have a greater confidence in the estimation of the population mean, instead of a point estimate, we can use __________. a perfect estimate an interval

In 2006, it was determined that 54% of Americans under the age of 24 felt that marijuana should not be legalized. Suppose a follow-up study is to be conducted next year, using a sample of 100 Americans under the age of 24. Please use 54% as though it were the value of the true proportion p {"version":"1.1","math":"p"}. Calculate the probability

In a study examining the effect of alcohol on reaction time, researchers found that even moderate alcohol consumption significantly slowed response time to an emergency situation in a driving simulation. In a similar study, researchers measured reaction 30 minutes after participants consumed one 6-ounce glass of wine. Again, they used a

hi! I have a end of term project. I am completely lost in this class. Please help me! See the requirements and questions attached. I would like to submit this before the deadline which is 12 /24. I would like to submit by 12/17 which is next Saturday. If you have any questions please contact me at v..s@gmail.com. Thank you in advance.

1. El rea de un tringulo es de 24 pies cuadrados y la base mide 8 pies. Cul es la altura del tringulo en pulgadas? 2. Un crculo tiene un radio de a metros. Si el radio aumenta al doble, Cunto aumenta el rea del crculo original?

Resting pulse rate is an important measure of the fitness of a person's cardiovascular system, with a lower rate indicating greater fitness. The mean pulse rate for all adult males is approximately 72 beats per minute. A random sample of 50 male students currently enrolled in the Business School at a major university was selected and the mean

Resting pulse rate is an important measure of the fitness of a person's cardiovascular system, with a lower rate indicating greater fitness. The mean pulse rate for all adult males is approximately 72 beats per minute. A random sample of 50 male students currently enrolled in the Business School at a major university was selected and the mean

Find the following probabilities based on the standard normal variableZ. (Round your answers to 4 decimal places.) a. P(Z> 0.74) b. P(Z1.92) c. P(0 Z 1.62) d. P(0.90 Z 2.94)

Coefficient of variation and standard deviation are two measures of dispersion or spread among data values. Provide two different sets of ten data points each as examples. Explain which of the two mentioned measures can more accurately specify which of these two data sets have more spread or variability in their data values. Calculate the standard

The net weights of a sample of bottles filled by a machine manufactured by Edne, and the net weights of a sample filled by a similar machine manufactured by Orno, Inc. are (in grams): Edne: 5, 8, 7, 6, 9, and 7 Orno: 8, 10, 7, 11, 9, 12, 14, and 9. Testing the claim, at the 0.05 level of significance, that the mean weight of the bottles filled by

Activity 7.6 - Module Problems Complete the following problems and submit the results in either a Microsoft Word document or a Microsoft Excel spreadsheet. If you choose to use an Excel spreadsheet, place each problem on a separate sheet and label the tab with problem number. Save your document with a descriptive file name, including the

What is the difference between the product and quotient rule?

(a) Define the decision variables and write the linear programming model for the problem in the space provided below (b) Sketch the feasible region. Give your answer in the worksheet named P1-Graph (i) You can use QM for Windows to get the graph, copy and paste it onto the worksheet named P1-Graph OR (ii) You can sketch the feasible region on

Solve the equation and please show work (3x - 1) 4 - 16 = 0.

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The statistical distribution used for the ANOVA test on the equality of population means is the ____distribution. t F z none of the above

Make up an example of two variables that might be related in such a way that the Pearson correlation coefficient could not be used to measure the relationship strength but the Spearman coefficient could be used instead. Explain the rationale for your answer.

please answer these questions as soon as possible, thank you Sketch the graph of each of the given functions by completing the following steps: (show all the work for each step) i) h(x)=x 2 25/9-x 2 (a) Find the domain. (b) Find any x and y intercepts. (c) Is the function even or odd? Is it periodic? (d) Find any/all vertical and horizontal

find the mean for the given sample data. unless indicated otherwise, round your answer to one more decimal place than is present in the original data values. students in hugh logans math class took scholastic aptitude test. their scores are shown below. fine the mean score 536 608 344 340 596 357 343 566 470 482

A new antiviral drug for hepatitis C was administered to 180 randomly chosen patients who had been diagnosed with this disease. Doctors wanted to know whether a patient's probability of improving was independent of the dose of the drug. They tested H0:The probability of improving is independent of the dose against Ha:The probability of improving

Against the wind a small plane flew 210 miles in one hour and ten minutes. The return trip took only 50 minutes. What was the speed of the plane in still air? What was the speed of the wind?

What are the concepts of independent and dependent events; can you please provide examples of independent and dependent events from the business environmentwith other examples as well please?

Correlation and Regression A survey was carried out to find the salaries for technicians working in maintenance at Atlanta International Airport. The number of years spent in education was recorded as was their yearly salary. Below in the table are the results for this survey. Education (years) Income ($ ,000s) 8 20 12 28 10 27 20 55 16 45 18 60

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