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Mathematics Questions and Answers March 13, 2022

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QUESTION 1 A common convention in social science is to set the alpha level at .05 and to reject the null hypothesis if the observed significance level is less than the alpha level, p < .05. Which of the following is correct? a. If p = .041, do not reject the null hypothesis b. If p = .074, reject the null hypothesis c. If p = .000, reject the null

Help please 6 A random sample of 25 items is drawn from a population whose standard deviation is unknown. The sample mean is = 850 and the sample standard deviation is s= 15. Use Appendix D to find the values of Student's t. points (a) Construct an interval estimate of / with 95% confidence. (Round your answers to 3 decimal places.) The 95%
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please help me solve this Brandeis, Math 10a Friday Assessment page 9 *G7 The graph of the derivative of a function f(x) is shown below. The graph above is the DERIVATIVE of f(x). Use it to answer the following questions about f(x). (a) On what interval(s) is f(x) increasing? (b) On what interval(s) is f(a) decreasing? (c) At what point(s) does f
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Next you want to compare the variation between (SSB) and within (SSW) dependent variable categories (that is, between and within incidences of bullying). Ideally, you will have high differences between (SSB) dependent variable categories relative to the difference within (SSW) categories. When the difference between SSB and SSW is great, do you

Calculate at least 2 measures of central tendency and at least 2 measures of variation for your Continuous Variable sample data. Explain the results and meaning of these measures in your report. Include a summary of the data in your report using a graph or table. Use Excel for this task. Describe what is a Discrete Probability Distribution.
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Find theZ-scores that separate the middle 54 % of the distribution from the area in the tails of the standard normal distribution.

This is the exercises of one sided limit, help me write down the full solutions with answers and also explanation ya Given the following function I 3x 7 30) = :3 I 2 .I Is the function continuous at a} x = -6 h] x = 1 Given the function 21:1 + 6x 20 f1(1) = I] 312 +2.1: 1' Is the function continuous? if no, why? if x
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Imagine you're running a casino and introducing a new game. The game involves rolling a fair six-sided die. Each player pays $10 to play. If the die shows a 1 or 2, the player wins $20. If it shows a 3 or 4, the player wins $10. If it shows a 5 or 6, the player loses. Discuss how you would calculate the expected value, standard deviation, and

please answer as accurately as possible and show all work according to textbook . Thanks. 4. Let f(x) =3x3 + x 2. a. Find an interval where the function f has one root. b. Use Rolle's theorem to show that the function f has exactly one root. Hint. See Example 2 on page 283 of the textbook. THE MEAN VALUE THEOREM III 283 IIll Figure 2 shows a graph
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In a survey of 2251 adults, 704 say they believe in UFOs. Construct a 90% confidence interval for the population proportion of adults who believe in UFOs. A 90% confidence interval for the population proportion is ( (Round to three decimal places asneeded.)

Last year, 29% of internet users had ad-blocking software installed on their device. In a random sample of 260 internet users, how many are expected to have ad-blocking software on their device?

What is the t obtained score for small two sample significance test with an alpha of .05 if democrats mean is 8.2, standard deviation of 1.5, sample size of 27 and republicans mean is 7.8, standard deviation of 1.3 and sample size of 24

can someone please help solve and explain this problem \f
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Name the basic unit, or building block, of all living things@@@@@@@@@@@ The@@@@@@@@@@@@V\VWHPkeeps the blood continuously supplied with The kidneys are part of the ____________ syurinary stem. @@@@@@@@@@@@@@

Z is a standard normal variable. Find the value of Z in the following (show your works) a.The area to the left of Z is 0.9279. b.The area to the right of -Z is 0.9834. c.The area between -Z and Z is 0.7108.

Briefly explain what is happening in the figure below (Cluster Density and Distance). \f
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Hoy es un da increble. A las 11:00 de la maana, recibo una llamada de Jennifer Lpez. Ella quiere trabajar conmigo en un proyecto que estoy preparando para mi clase de msica. Tambin, ella me va a pagar un milln de dlares por mi trabajo. Yo . Nosotros estamos sufriendo. Hace mucho sol, la temperatura es de 35 grados y estamos en el campo jugando con

Canvas Gy Exam X Consider the following dependent random samples Observations x-values 2 22.0 21.0 23.1 21.7 3 18.1 18.7 6 19.6 13.2 17.5 20.7 14.7 16.4 y-values d = [al = -0.65 [di-a Sa= = 0.916 n-1 1. State the null and alternative hypotheses, the degrees of freedom and the t value. 2. State if this a left-tailed, right-tailed, or two-tailed

Full steps, Thank you! 4. (15 points) Let A (1, 1, 0), B(2, 1, 1), C(0, 2,0), and D(1, 2, -2) be four points in R3. Using vector method: (a) (5 points) Find the volume of the parallelepiped with adjacent edges AB, AC, and AD. (b) (5 points) Find the equation of the plane that contains A, B, and C. (c) (5 points) Find the distance from the line CD
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1.A common blood indicates the presence of a disease 95% of the time when the disease is actually present in an individual.Joe's doctor draws some of Joe's blood and performs the test on his drawn blood.We also know that one percent of all people have the disease.Also, if a person has the disease, then the probability that the diagnostic blood

Recommend the steps that should be taken to draw the particular sample described below. Format your response as a procedure.

Spurious correlation refers to the apparent relationship between variables that either have no true relationship or are related to other variables that have not been measured. One widely publicized stock market indicator in the United States that is an example of spurious correlation is the relationship between the winner of the National Football

Without doing any computation, put the following in order from least to greatest, assuming the population is normally distributed with muequals150 and sigmaequals15. (a) P(140less than or equalsx overbarless than or equals160) for a random sample of size nequals10 (b) P(140less than or equalsx overbarless than or equals160) for a random sample of

A satellite has been placed in a circular, sun-synchronous orbit at an altitude of 1500.0 km. The satellite has a mass of 1200 kg. What is the K.E. of the satellite?

what kind of variable is work? Continuous or Discrete

As it is always very easy to detect randomness in a time series plot just by visual inspection, there is no need for any quantitative method to test for randomness. True or False An exponential smoothing method with = 1 is equivalent to moving average method with a span of 1. True or False

Which of the following characteristics of a Measurement System Analysis relates most to variation over time? A.Stability B.Adequate resolution C.Accuracy D.Discrimination

hoose the correct factorization of 10000 Superscript 42 Baseline times 2700 Superscript 20. A.2 Superscript 168 Baseline times 5 Superscript 168 Baseline times 2 Superscript 40 Baseline times 3 Superscript 60 Baseline times 5 Superscript 40 2 Superscript 168 Baseline times 5 Superscript 168 Baseline times 2 Superscript 40 Baseline times 3

Which of the following is correct about Monte Carlo simulations? Which of the following is correct about Monte Carlo simulations? Uses repeated random sampling to obtain numerical results that are displayed via bubble charts and pie charts. Uses one number to obtain numerical results that are displayed via histograms and probability distribution

A new thermostat has been engineered for the frozen food cases in large supermarkets. Both the old and new thermostats hold temperatures at an average of 25F. However, it is hoped that the new thermostat might be more dependable in the sense that it will hold temperatures closer to 25F. One frozen food case was equipped with the new thermostat,

Volatile Stock and Law of Large Numbers Suppose a very volatile stock rises 70 percent or drops 50 percent in price, with equal probabilities and with different days independent. (a) Suppose a hedge fund manager always invests half of her current fortune into the stock each day. Let Yn be her fortune after n days, starting from an initial fortune

I don't understand f ( 20 ) = 40+8 254 x +4 x>4 Enter your answers as integers in increasing order. If there are no discontinuities, enter NA in both response areas an continuous in both drop-down menus. If there is only one discontinuity, enter NA in the second response area and sele continuous in the second drop-down menu. ac = Click for List x
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Patient Waiting Times. Suppose that the average waiting time for a patient at a phy sician's office is just over 29 minutes. To address the issue of long patient wait times, some physicians' offices are using wait-tracking systems to notify patients of expected wait times. Patients can adjust their arrival times based on this information and spend

A concrete manufacturer wanted to test the durability of two different types of reinforcements to its concrete: rebar and fiber. Employees who work in the research and development department cast 6 different sizes of concrete, making one of each size with rebar and one of each size with fiber. Then, the employeesput the concrete under a steadily

content area top Part 1 The following data represent the flight time (in minutes) of a random sample of six flights from Las Vegas, Nevada, to Newark, New Jersey, on United Airlines. 282, 270, 266, 257, 260, 267 Compute the range and sample standard deviation of flight time. Question content area bottom Part 1 The range of flight time is 25

Suppose that in the month of September following the end of the series, the observed production is 576 and the September seasonal effect is -3.957526, calculate the seasonally adjusted value (de-seasonalized value) for this month based on the additive decomposition

1) (50 points total) In this exercise we will examine whether a teacher's physical attractiveness has any impact on student course evaluations. The dataset to use is called teachingratings, and a description of the variables is available as well. You can access these through the course website. Use an =.05 for hypothesis testing. We'll first

3.3.5Question Help Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 74.6 Mbps. The complete list of 50 data speeds has a mean of x bar =17.64 Mbps and a standard deviation of S =20.77 Mbps. a. What is the difference betweencarrier's highest data speed and the mean of all 50

Dr. Espinoza wanted to know if exposure to the risks of bullying helped reduce bullying at her school. To explore this question she randomly select 200 students in her school and randomly enrolled half the students in an 8-week anti-bullying course; the other half kept their regular course schedule. At the end of the 8 weeks, she had all 200

I need help with the following question. Which one is the correct answer please? In a correlation study, there is/are _____ group(s) of subject, and each subject is measured on ____ variable(s) A 1,1 B 1,2 C 2,1 D 2,2

The limit of f(x) as xright arrowa describes what happens to f(x) when x is near, but not equal to, the value a. Question content area bottom Part 1 Choose the correct answer below. A. This statement is true because it is part of the definition of the limit. B. This statement is false because the limit of x as f(x)right arrowa describes what

Both Dunn's test and the Bonferroni correction methods aim to control Type I error, but Dunn's test potentially offering a better balance between Type I and Type II errors

extrinsic N=23, mean 15.74, standard deviation 5.25 intrinsic N=24, mean 19.883, standard deviation 4.44 Find a 95% confidence interval for the difference in the means of the distributions of the extrinsic group and the intrinsic group. Interpret the confidence interval.

7. For the regression equation Y = 2X - 1, if the mean for X is Mx = 8, what is the mean for Y? a. 15 b. 7 c. 4.5 d. Impossible to determine
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b. Look at the final two values of your standard curve on the scatterplot, do they correlate strongly with the rest of your data? Why or why not
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Internet provides: In a survey of 6000 homeowners with high - speed internet plan was $64.20 with standard deviation $11.77. Assume the plan cost to be approximately bell shaped. Estimate the number of plans that cost between a. 40.66 and $87.74 b. $52.43 and $75.97. 52. Internet provides for the data in exercise 48, estimate the number of

What is an infinite series? What does it means for such a series to converge or diverge. What happens if you add or delete a finite number of terms to a convergent or divergent series? Please provide an example.

Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 23 people who drank ethanol and another group of 23 people given a placebo. The errors for the treatment group have a standard deviation of 2.30, and the errors for the placebo group have a standard

Sherri is doing a study. She believes that the subjects in her study will do about the same as the entire population would. Thus, the belief that Sherri's mean does not differ from the population's mean is the _____ hypothesis, and the belief that Sherri's mean is significantly different from the population's mean is the _____ hypothesis

A random pairing done in competitions is called: Select one: a. Mixed Proficiency b. Team Matches c. Strictly d. Jack and Jill

Chi Square test {gh' school data} ND'ITE: You do not have to wggh' the cases for this exercise This study collected data from 130 high school students. The researchers want to assess if the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their
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Select all that apply Which are reasons why a graph might be more useful than a table to aid in the understanding of quantitative information? Multiple select question. A graph can show how high values can get, whereas this is not easily seen in table form. A graph might show unique features of large data sets, like overall increases or overall

how do I quantify the variable in a political affiliation survey

Could you analyze differences between the 4 ACT subscores in one MANOVA? for the following question. 1.Is there a significant difference in ACT composite test scores between band students and non-band students within a rural secondary school? Would you consider building in the previous year's test score as a covariate? Should I use a propensity

need a assignment for the Team-Pair-Solo (The team pools their knowledge and skills to try a new procedure. After success as a team, they break into pairs and the pair completes the procedure. And finally, after much support and modeling, students are ready to perform the skill independently.) 1. Team work together to solve problem. 2. Pairs work

Hi Team, Before conducting more in depth research, my first thought for how both of these claims can be true is when we consider the classic mean, median, and mode for this situation. Perhaps one way is that the target audience for the Tread Master came first and that they had a larger sample size to survey and gather data that showed the average

In one statistics course, students reported studying an average of 9.5 hours a week, with a standard deviation of 1.5. The professor tells David his study time is at the 67th percentile. How many hours does David study each week? 8.84 10.925 8.075 10.16

8) (2e4X - 5e X) dx Solve the initial value problem. 9) ds dt = cost - sin t, s = 9 10) - = 10t + sec-t, r(- 7) = 4 dt 11 ) dy 1 dx x3 + X, X > 0; y(2) = 5 12) dr d+2 +3 dt t=1 = 5, r(1) = 5 Find f(x) given f"(x). Your answer will involve two arbitrary constants. 13) f" (x) = 7x +5 will aire
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An employment information service claims the mean annual pay for?full-time male workers over age 25 without a high school diploma is ?$ 22 comma 300 22,300 . The annual pay for a random sample of 10 10 ?full-time male workers over age 25 without a high school diploma is listed. At alpha ?equals = 0.05 0.05 ?, test the claim that the mean salary is
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ased on these results, t(2 0)= 2.03, p = .06, n2= .13, what can the educational researcher say about the null hypothesis?

(2 points) If L and U are invertible, then (LU) -1 = U-1 1-1. Inverses of Upper and Lower triangular matrices are easier to calculate than inverses of general square matrices. Use this to Find A- from the given LU factorization: A=LU- 7 41-[1 81 13 -31 AT = 188 =(2 points) Find the LU factorization of 2 1 4 2 A = 10 9 15 9 2 9 4 5 That is, write A
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Consider the following set of constraints: 6Y >= 600; 0.25 X + 3Y >= 300, and X + Y

Find the interval of convergence for the power series: a) n = 0 i n f i n i t y (2^(n+1))(x^n) / (n^2)(5^n) b) n = 0 i n f i n i t y 4(x+2)^n/ 16^n

Need help for all the questions from 1-5. Thanks in advance. 001.jpg" /> MATH 127 1 HOME WORK 2 Due : Wed Oct 3 @ 0830 1 ) An alternate method to compute a definite integral is to use :" \\ } ( x )ax = lim\\ f ( *` ) Axis 1 = 1 Here the subintervals do not always have equal width . In other words , the width of each* subinterval Ax ; may depend
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Fill in the blanks to complete the passage about experiments with independent variables that cannot be manipulated. While a(n) - includes a manipulated independent variable in order to see the change in a dependent variable, a(n) - includes an independent variable that cannot truly be manipulated by the experimenter. Because participants cannot be

8. A trucking company continuously monitors the tread remaining on its fleet of truck tires. The firm knows that standard deviation is 0.1 cm. Suppose a sample of 80 tires were obtained, and the mean tread was 2.2 cm. Construct a 99% confidence interval. The company's operations manager knows that flat tires occur more often when the tread is

A survey of first-time home buyers foundthat the sample mean annual income was $46,000. Assume that the survey used a sample of 25 first-time home buyers and that the sample standard deviation was $1,100. Compute and explain a 95% confidence interval estimate of the population mean.

Question 4 Suppose that a fisherman catches fish according to a Poisson process with rate 2 per hour. We know that yesterday he began fishing at 9:00 pm. (a) What is the probability that he caught exactly two fish by 10:00 am yesterday? (b) What is the probability that he caught exactly two fish by 10:00 am yesterday and five fish by 11:00 am

A retail company is interested in examining whether the time taken for it to obtain approval for a credit card number by phone varies among some different states in US. An ANOVA table is obtained in Table 1. \f\f
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1.The age (in years of the 6 doctors at a local clinic are the following 45, 32, 30, 39, 43, 45 If these ages constitute an entire population, find the standard deviation of the population, round you answer to two decimal places.

BASED ON THIS INFO: EDIT THE SECTION FOR THE METHODS, SUBJECTS, PROCEDURE, AND STATSICAL ANAYLYSIS FOLLOWING THESE EDITS: Two key notes and a reference: The term 'control' leads the reader to believe that you have a 'no warm up' condition - change it to the self-directed or self-determined warm up. Remove any language in your statistical analysis

What data in Google Analytics might indicate that a website or page isn't rendering properly in a particular browser? Question 2 options: A significantly higher exit rate for visitors using Opera compared to other browsers A significantly higher bounce rate for visitors using Firefox compared to other browsers A high bounce rate and slow site

En la investigacin del mercado, los datos cuantitativos producen informacin que puede comunicarse a travs de nmeros o mtricas; mientras que los datos cualitativos producen informacin descriptiva, no numrica. Grupo de opciones de respuesta Falso Verdadero

Can someone help me solve this? The table below shows annual return data for 10 firms in the gold industry and 10 rms in the oil industry. The data is also included in the workbook for Quiz Six. Can we conclude, at (I = 0.10, that the average return is the same for both industries? Do not assume that the variances for returns for the two
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Let X and Y be independently and identically exponentially distributed random variables with a mean of . Define U = X X + Y and W = X + Y. The joint density function for U and W is fUW (u, w) = 1 2 wew/ , 0 < u < 1, w > 0 0 , elsewhere.

A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces. After the redesign, the absorption amounts of a sample of sponges were (in ounces): 4.1, 3.7, 3.3, 3.5, 3.8, 3.9, 3.6, 3.8, 4.0, and 3.9.For 0.01 level of significance,what is the cut-off weight in ounces?

Consider the following graph of the function g. For which value(s) of a does g(x) approach a different number from the right side than it approaches from the left side? (Select that apply.) O -3 0 - 2 0 -1 0 1 0 3 For which value(s) of a does g(x) increase or decrease without bound as x approaches a or for which value(s) of a is g(x) not defined?
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Rewrite the equation v=exp(2w+9x-16y+64z) as the product of four terms. Note that writing exp(a) is the same as writing e a .

Consumer Reports stated that the mean time for a Chrysler Concorde to go from 0 to 60 miles per hour was 8.7 seconds. (a) If you want to set up a statistical test to challenge the claim of 8.7 seconds, what would you use for the null hypothesis? (b) The town of Leadville, Colorado, has an elevation over 10,000 feet. Suppose you wanted to test the

Respond to the following: When was the last time you heard reference to something being correlated? In the context you heard it what was the person trying to tell you? Did they explain why it was correlated

can you show me how to work this problem in excel? The following data are collected to study unemployment in a particular region in upstate New York. The first column shows the number of months unemployed and the second column shows the count of people in the study with the corresponing unemployment length. LetXbe a random variable indicating the

the total cost of producing g units is: c (g)=g^2+4g+200 dollars. the price at which g units are sold is: 40-g dollars. Use calculus to find the level of production that results in maximum profit.

X has a continuous uniform distribution on the interval (5,95) What would be P(X > 58 | X > 34)

if the assumption has not been made then we should use non-parametric test with ANOVA

The calculation of a pooled estimate of the population variance assumes that the two populations from which the samples were drawn have the same variance. degrees of freedom for the two samples are equal. means of the two samples are equal. variances of the samples are based on the same number of cases

Please answer all four parts of the question showing full work Question 4. (3 + 5 +5 +5 points) Evaluate the integral if it exists. If it does not exist, explain why. )I=2/_d:c coasec I9 311126 (d) 1:]E cos29 d6
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If survey was done on 2019 and there was a low response to the survey and the same survey was done in 2020 and the response had a higher rate than Survey 2019. Would the results from 2020 (if higher) be significantly different or not from 2019? How about if it has a lower rate from 2019? Would this be significant different or not? What p-value can

HW 4 UCLA - MAE 107 Homework objectives This homework has two objectives: 1. The first problem considers the first order ODE y = ay b1 u b2u. This ODE models several circuit topologies you have studied in prior homework. Note that this ODE can be considered as a "superposition" of two familiar ODEs: y = ay b2u and y = ay b1 u. 2. Problem 2 will

Expenditure : Food 1. Confidence Interval Analysis: For one expenditure variable, select and run the appropriate method for estimating a parameter, based on a statistic (i.e., confidence interval method) and complete the following table (Note: Format follows Kozak outline): They spent 6900 annually on food. Table 2: Confidence Interval Information

If you had a normally-distributed process with some average (x-bar) and some standard deviation (s), how would you find the expected percentage that would be above (or below) a certain point of interest? Group of answer choices You would calculate the population arithmetic mean You would calculate the population sigma You would calculate a Z score

Regression analysis provides the researcher with an opportunity to predict and explore future outcomes. Whether it is to determine prevention methods, promote opportunities for learning, or propose new treatments, looking towards the future can have a significant impact on patient care and sustained positive patient outcomes. Exploring regression

A marketing researcher wants to estimate the mean savings($) realized by shoppers who showroom. Showrooming is the practice of inspecting products in retail stores and then purchasing the products online at a lower price. A random sample of 100 shoppers who recently purchased a consumer electronics item online after making a visit to a retail

Match each description to the type of probability being depicted. You notice that your friend grabs his umbrella on the way A. Classical out the door, which surprises you since the sky is clear. B. Empirical When you ask him why, he says, "There is a 100% chance that it rains if I forget my umbrella." C. Subjective 4 The cash register at a fast

Attribute charts are used for Group of answer choices Counted data Variable data Continuous data Measurable data

SPY KO DIS N 64 64 64 monthly average return 0.0072 0.0060 0.0050 monthly return std 0.0397 0.0437 0.0673 Monthly investment growth geomean 0.9917 0.9871 0.0791 mean-geomen -0.9845 -0.9811 -0.0741 annualizedgeomeric- mean 0.1111 0.0903 0.1445
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3. Suppose f (y) is a probability density function (pdf). Let mm) = f: {Maa where f('")(y) is the rth derivative of y). (a) When f is pdf of N (a, 02), please nd R( f (2)) so that we are able to obtain the bandwidth based on normal scale rule. (b) Show that under some conditions, Rom) = (1)? foo Mommy. Which kinds of conditions do we need here?I
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When data follows a normal distribution, it allows us to make certain assumptions about it that can be helpful. In addition, normal distribution is a requirement for several statistical analyses. There are multiple ways to determine if a dataset is normally distributed, one of which is by looking at a histogram

(c) We are 95% confident that the interval from 0.53 to 0.61 contains the true proportion of adults in the country during the period of economic uncertainty who believed wages paid to workers in industry were too low. Is the interpretation reasonable? A. The interpretation is reasonable. B. The interpretation is flawed. The interpretation suggests

Answer items 7 and 8 from the following information: The mean for VO2max is 50 ml/kg/min and the standard deviation is 10 ml/kg/min. Professor Mill wants to estimate VO2max from a field test of running a given distance for time. The coefficient of determination for the correlation between VO2max and running time is .84. Assume that his equation

Create a hypothetical situation that states a skill that you are going to teach and a specific group of people who are to be the learners. You will have only 10 minutes within this segment to teach this skill. Detail a brief plan that will efficiently utilize the amount of time allocated in order to produce maximum skill development

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