S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. may 2023
  6. 20

Mathematics Questions and Answers May 20, 2023

Expert-verified solutions to help you succeed

One indication that a population is not normally distributed is when Group of answer choices A small sample drawn from the population is positively skewed. Two variables are measured at the same time. A scale or index is used for the measured variable. A ceiling or floor effect is present in a large sample

Write an equation of a line tangent to the graph 3 x squared equals short dash 3 y squared plus 75 at the point left parenthesis short dash 4 comma short dash 3 right parenthesis

Hands-on Assignment 3: Problem Statement Let's suppose we want to find out if there is a correlation between the use of prescription drug use and health insurance coverage (meaning are people getting more prescriptions if they have health insurance coverage). This requires data mining to explore if there is a correlation, and we have to integrate

Which best describes the result of the query below? SELECT YEAR, AVG(GPA) FROM STUDENT WHERE GPA > 2.0 GROUP BY YEAR a. The average GPA of the students with a GPA higher than 2.0. b. The average maximum GPA of all the students in each year. c. The average GPA of students with a GPA higher than 2.0 each year. d. The year of the student with the

In previous exercises we have linked probability to recurrence interval: Probability of an event = 1 / recurrence interval. What recurrence interval does a 1% probability of flooding indicate? In previous exercises we have linked probability to recurrence interval: Probability of an event = 1 / recurrence interval. What recurrence interval does a

A study was conducted to test the hypothesis that the type of praise affects students' school performance. Two groups are set up. One group of students receives effort-praise on good performance and the other group receives ability-praise. The researcher then compares the two groups on their subsequent test performance. In inferential statistics,

Pls help I need the answer Question 7 In the accompanying diagram of a circle, chords AC and BD intersect at point E, DE = 6, EB = 4, and AE = 3. What is EC? D E C A B O a. 4 O b. 11 Oc. 7 Od. 8
image text in transcribed

Vanessa earned scores of 72, 96, 68, and 81 on the four exams in the class. What was her mean exam score? Round your answer to the nearest whole number

20 The following regression equation can be used to predict children's height (in feet) based on their age (in years): Height = 2.34 + .22(Age) Based on this equation, what is the expected height of an eight-year-old boy? 3.81 feet 3.88 feet O 4.10 feet O 4.23 feet

This week we will be using an excerpt from the National Health Interview Survey available through the CDC here: https://www.cdc.gov/nchs/nhis/2019nhis.htm(Links to an external site.) . Download the required data set (in Excel format), that includes the coded variables and their values, run descriptive statistics using SPSS, copying and pasting

explain what is meant by the mathematical concept known as the derivative. Provide a real-life example where the derivative is used. Feel free to use one of the areas provided above or find your own. Be certain to cite your source(s). please provide enough information

What is an effective way of using the same script with many students without it becoming boring? a. Get different groups of students to act out the same script in different ways/styles b. Do a different activity instead c. Students learn best with repetition d. Have only one select group perform the skit

Remember our baby chick data? Below is data about the weight of the chicks in ounces, at one-week old. Use that information to answer the questions that follow. Chicks on control diet: n = 19, EX= 53,[X2 = 154, (EX)2 = 2809 Chicks on experimental diets: n = 30, EX = 104, EX2 = 369, (EX)2 = 10,816 31. What is the mean for the "control" diet?

zoom # 68% Edit View History Bookmarks Profiles Tab Window Help tion 4 - Ch 12 Homework connect.mheducation.com%252F#/acti... () ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUri=https%2534%252F Help Sav Saved Homework Assignment i 4 Using data from 50 workers, a researcher estimates Wage - So + 1Education +
image text in transcribedimage text in transcribed

Question 1 Use table-lookup method to find the Laplace transform F (s) of the following functions in / domain : (a) f(1) = (2+41+2)@" (5%) (b) f(1) =be" cos 21-elf (5 %) (c) f(1) = sint [ HINT : cos 2/ = cos' / - sin ; sin / + cos? ( = 1 ] (10 % )Laplace and Inverse Laplace Transforms First and second order transformation: L{ f' (t) } = sF(s) -
image text in transcribedimage text in transcribed

Select all the options that are statistically significant predictors of AIDS per 100k in the final model

An advanced type of regression analysis that handles research situations in which people are grouped in some way that could affect the pattern of scores is multiple regression. partial correlation. factor analysis. multilevel modeling

A hotel chain is comparing the results of two locations. Hotel A has a much higher conversion rate than Hotel B. You note that customers at Hotel B tend to abandon the cart after checking Rates and Availability. This could be explained by Hotel B being much smaller or busier than Hotel A. Question 4 options: True False

A headline states "Heartburn predicts a hairy baby". What type of claim is this? Group of answer choices Frequency Associational Causal

You have decided to place $168 in equal deposits every month at the beginning of the month into a savings account earning 13.49 percent per year, compounded monthly for the next 7 years. The first deposit is made today. How much money will be in the account at the end of that time period? Round the answer to two decimal places.

4. (12%) The function f(x, y) = 12x - 23 - 2y2 + y has 6 critical points. Find and classify them (Local Max / Local Min / Saddle) with the Second Derivatives Test. 4
image text in transcribed

Which of the following describes the amount of variation in the response that is explained by the least squares line? Question 4 options: Line of best fit Variability

Suppose we use the R command below, where all variables below are quantitative. lm( Revenue ~ ResearchBudget + AdminBudget + MarketingBudget, data=BronlynsExamData) We are given the summary statistics below: Variable Estimate of coefficient p-value (intercept) 50000 0.00002 ResearchBudget 2.1 0.00001 AdminBudget 0.2 0.84 MarketingBudget 1.4 0.003

A random sample of 20 wait times at a local hospital's Emergency Room found an average wait of 12 minutes with a standard deviation of 1.2 minutes. Find the 95% confidence interval for the true average wait time at the hospital's ER. Then interpret the confidence interval with a complete sentence

if there is a significant difference existing between the listing price averages of the mid atlantic region compared to the national average the confidence level used to determine this is 95% or a significance level of = 0.05. means

Which of the following is the best example of nominal scale data? Which of the following is the best example of nominal scale data? A researcher ranks video game players by their skill, from best to worst A researcher asks people to indicate how many hours of video games they play per week, on average A researcher categorizes people into those who

Daily balances on personal cheque accounts at the U1 bank are normally distributed, with a mean of $600 and a standard deviation of $200. What percentage of daily balances are in excess of $1000

\f
image text in transcribed

Pls help I'm stuck on the answer Question 19 In the circle shown, chords AC and BD intersect at E. If AE = 8, EC = 6, and BE = 4. How long is DE? A B C D O a. 12 O b. 10 O c. 14 Od. 16
image text in transcribed

A researcher is interested in estimating a Structural var. Consider the invertible reduced-form VAR with 3 variables: (I - \Phi L)Y_t = u_t, u_t \sim iid N(0, \Sigma) where \Sigma has non-zero diagonal entries. Assume, that there are 3 structural shocks \epsilon_t = (\epsilon_{1t}, \epsilon_{2t}, \epsilon_{3t})' that drive the system, with

Consider the following parlor game to be played between two players. Each player begins with three chips: one red, one white, and one blue. Each chip can be used only once. To begin, each player selects one of her chips and places it on the table, concealed. Both players then uncover the chips and determine the payo to the winning player. In

The days to maturity for a sample of five money market funds are shown here . The dollar amounts invested in the funds are provided Days to Maturity Dollar Value ( 5 millions ) 16 20 15 20 8 10 5 25 4 10 Use the weighted mean to determine the mean number of days to maturity for dollars invested in these five money market funds . Round your answer

Suppose the height of an object at any time t 0 is given by the function h(t , where h is feet and t is in seconds. The first derivative h'(t represents the rate of change in height with respect to time (which is actually the velocity of the object), and the units are feet per second. What does the second derivative h''(t represent, and what are

Reflection: In a minimum of 100-200 words per question, describe what you did and/or observed during this 3rd grade math class field experience. What went well? *

Penn state stat 500 suppose the researcher would like to see if the stopping distance of an automobile is different for the two tire brands. What is the response variable and what type of variable is it? What is the explanatory variable and what type of variable is it

The degree to which a measure is consistent. This can be consistency over time, with the other items of the measure, or among others raters or subjects. options: Validity Reliability Continuance Reproducibility

What are the "unstandardized coefficients" values in a multiple regression output used for? Group of answer choices To create the regression equation. These are not included in a multiple regression output. To determine the nature and strength of the relationhip between the variables. To determine if the regression line is a good fit for the data

Use Sheet 2 of the Excel file to answer the following questions. A school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.750 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Create a histogram, and calculate @, the t-statistic, and the p-value. From the
image text in transcribed

Which of the following describes a limitation of all measures of correlation? Group of answer choices It requires equal variances. It cannot prove causation. It only compares two means at a time. It requires that variables have a curvilinear relationship

What does this mean " and the post-two-month mean was 10.13 Compared to the control group, which revealed a relative increase in the mean impulsivity score at the post- and post-two-month intervals, the Arabic Versions of the Beck Scale for Suicide Ideation Scale mean score before the intervention was 16.33 SD (6.08), then the post was 7.23 SD

Cul de las siguientes afirmaciones es falsa? A. El cambio de aceite o lubricacin en un motor se puede considerar una tarea de servicio (servicing) a realizar en el primer nivel de mantenimiento (O). B. El cambio del alternador en un motor se puede considerar una tarea de servicio (servicing) a realizar en el primer nivel de mantenimiento (O). C.

Which of the following types of experiment is most likely to provide results that mimic actual practice in real-world settings? Group of answer choices field experiment Internet experiment laboratory experiment None of the three settings can inexpensively collect data from a large sample

Find the graph that matches the following hypothesis test. H 0 : p 17.1 , H a : p < 17.1 Select the correct answer below: A normal curve is over a horizontal axis and is centered on 17.1. A tick is labeled on the axis at a point less than 17.1. The area under the curve from the point less than 17.1 on the left is shaded. A normal curve is over a

Answe the question please! 4. Write the equation of the line that passes through the points (3, 7) and (-1 2) in: (a) Point-slope form
image text in transcribed

if other factors are held constant, which set of sample characteristics is most likely to reject a null hypothesis stating that = 80?

Decisions for each of the steps in the DECIDE process are dependent on decisions for the previous steps

The main use of chi-square is to __________. compare mean differences. remove the need for a population mean in nonparametric tests. calculate the critical region of F obtained. determine whether categorical variables are significantly different

What is the difference between Qualitative Risk and Quantitative Risk? Choose one 5 points There is no difference Qualitative uses qualifications not needed in quantitative analysis Qualitative is an educated guess while Quantitative uses "hard" numbers to create metrics Qualitative risk is determined by the business and Quantitative is determined

Which of the following is true of the "Doctoral or professional degree" education level category, as defined by the Bureau of Labor Statistics: Group of answer choices It usually requires at least 3 years of full-time academic work beyond a bachelor's degree It usually requires at least 2 years but not more than 4 years of full-time academic study

In this area, Ashland can perform the following skills: a. Uses the toilet on his own b. Pulls pants down and up independently c. Takes off and puts on jacket independently d. Use a spoon when eating e. Eats food without assistance f. Throws garbage on his own g. Hangs jacket and backpack on his own h. Washes his hands independently i. Wipes table

nfant and children's heights and weights are often reported in percentiles. A percentile is the percentage of children who have a lower height or weight than the stated value. According to the CDC, the 50% percentile for the weight of a 36-month-old male is approximately 31.9 pounds. Assume that the weights of 3-year-old male children follow a

1. Research was conducted to see if swearing made people feel better when in an uncomfortable situation or not. All subjects were instructed to put their hands in ice water, say a neutral word, then rate their level of pain. Then the same participants were instructed to put their hands in ice water again, say their favorite curse word, and rate
image text in transcribed

Randomly select one card from a standard deck of 52 cards. Suppose we define the event LaTeX: A to be that the selected card is a Diamond, and the event LaTeX: B is that the selected card is a Spade. Then LaTeX: A and LaTeX: B are independent. Note: A standard deck of playing cards contains a total of 52 cards of 4 types: 13 each of Spades, Clubs,

Solve the recurrence an 2 an_1 + (In2 an_3 + 8 (n 2 3) where a0 = 0, a1 = 4 and a2 = 4 by using a characteristic equation and a particular solution
image text in transcribed

Jy 1/(z + 4) dz, where y is the circle of radius 1 centered at -4, oriented counterclockwise. Sy (Re z) dz, where y is the line segment from 1 to i. (y (z2 + 3z + 4) dz, where y is the circle | z) = 2 oriented counterclockwise
image text in transcribed

Which of the following is/are formal procedure(s) for determining whether the result we obtained from our experiment is due to chance or not. (choose one or more) Group of answer choices Compare p-value to alpha Compare the test statistic to alpha Compare p-value to the critical value Compare test statistic to the critical value

Find the median of the following set of numbers. {36, 16, 24, 32, 46}

A researcher completed a one sample t-test and calculated a 99% confidence interval as [0.75, 1.10]. What does this confidence interval tell you?If you collected many, many more samples, the true mean would be contained within 99% of similarly constructed confidence intervals. There is a 99% chance the true mean is contained in this interval.

10 options: The waiting time for a table at a busy restaurant has a uniform distribution between 0 and 10 minutes. What is the 95th percentile of this distribution? (Recall: The 95th percentile divides the distribution into 2 parts so that 95% of area is to the left of 95th percentile) _______ minutes Answer: (Round answer to one decimal

During model evaluation and validation, what performance metrics are used to assess the accuracy of the models? a. Mean squared error, R-squared, and adjusted R-squared b. Jaccard similarity coefficient, cosine similarity, and Kendall rank correlation c. Sensitivity, specificity, and area under the curve d. Accuracy, precision, recall, and F1 score

Which of the following possibilities is a serious concern with a repeated-measures study? Question 40 options: You will obtain negative values for the difference scores. The results will be influenced by order effects. The mean difference is due to individual differences rather than treatment differences. All of the other options are major

En una ciudad hay tres canales de televisin, A, B y C. Una persona selecciona un canal cada da. Si sintoniza el canal A un da, al da siguiente puede igualmente sintonizar cualquiera de los otros dos canales. Si sintoniza el canal B, al da siguiente tiene un 40% de probabilidad de volver a sintonizar el mismo canal e igual probabilidad de

I believe that the statistical test which would be the most appropriate for my chosen variables is the multiple regression. This analysis is a statistical technique utilized to examine the relationship between multiple independent variables and a single dependent variable. The aim is to understand how the independent variables collectively predict

Age, x Vocabulary size, y 1 4 2 230 3 620 4 1100 5 2100 6 2600 3 570 5 2300 2 250 4 1400 6 2500 The accompanying table shows the ages (in years) of 11 children and the numbers of words in their vocabulary. Complete parts (a) through (d) below. requals 0.977 (Round to three decimal places as needed.) Part 3 (c) Describe the type of correlation, if

Una compaa de Florida que est asignada al "Nivel 2" para cobertura bajo FWCJUA debe pagar: A. tasas que son un 25% superiores a las tasas voluntarias del mercado. B. tarifas un 50% superiores a las del mercado voluntario. C. una comisin de hasta el 10% de la totalidad de su nmina. D. una comisin de hasta el 5% de la totalidad de su nmina

I need an excellent spreadsheet filled in with the following info, please (attached) There are 195 sovereign countries in the world today that are officially recognized. Look at the populations of cities within Brazil at four different points in time Use all of the data points for each of the years given but note that not every city has a

We do an independent-samples t-test, and find that the p-value for the Levene's test for equality of variances is not significantit is greater than .05 This means a. our variances in our two groups are not dissimilar, and we are sad b. the variances in our two groups are not dissimilar, and we are happy c. the means of our two groups are not

All of these statements apply to cross-sectional studies except Group of answer choices They are never appropriate for testing hypotheses Participants may be selected by exposure status or as a sample of the entire population The sample size is the total number of people on whom the data is based They can never measure risk They only produce

case study 5 Question 1. build up a model to solve the problem. this model should find the optimal solution such as which teacher should teach which courses and in which time and day. question 2. for building up this model, find out the variables and constraints. Question 3. explain what is the problem and how to find the solution. Ivey Publishing
image text in transcribedimage text in transcribedimage text in transcribed

a Multiple Choice 17-055 Question Workspace Exhibit 17-4 The Espresso Cart has had the following pattern of espresso sales over the last two weeks: Week1 Week 2 Monday 873 Monday 912 Tuesday 904 Tuesday 859 Wednesday 911 Wednesday 906 Thursday 887 Thursday 900 Friday 899 Friday ? Refer to Exhibit 17-4. What is the forecast for Friday's sales using

Match the following terms to the correct descriptions: Question 32 options: often our first go-to analyses to understand our data allow us to determine beyond a reasonable doubt that groups vary systematically used to summarize a set of observations used to draw presumptions from a sample to a population 1. Inferential Statistics 2. Descriptive

A study is conducted to evaluate the effectiveness of a weight loss program. A group of 20 participants undergoes the program, and their weights are recorded before and after completing the program. The table below shows the weights (in kilograms) of a sample of five participants: Participant Before (kg) After (kg) 1 80 75 2 65 62 3 72 70 4 68 67

La participacin en la La participacin en la Asociacin de aseguramiento conjunto de automviles de la Florida es obligatoria para: A. Todos los residentes del estado de Florida. B. Aseguradoras de Florida que solo ofrecen seguros de automviles de lneas personales. C. las 10 aseguradoras de automviles ms grandes de Florida. D. todas las aseguradoras

An Internet service provider sampled 555 customers, and finds that 78 of them experienced an interruption in high-speed service during the previous month. Find a point estimate for the population proportion of all customers who experienced an interruption. Round the answer to at least three decimal places

If you are sampling the entire population of Suva, and you distribute your questions to every person in Suva your sample can be said to be ______________. A. biased B. representative C. random D. stratified

Why might a researcher be interested in examining the pre-test scores of the participants who dropped out of their study? Group of answer choices There is no reason to examine the scores of participants who dropped out of the study because those scores are not included in the final results. To determine if there was a fundamental difference in

This type of research moves from general to specific. Here, one uses a theory to develop hypotheses and collect data to test those hypotheses. options: deduction conduction induction reduction

Simplify using the distributive property. negative 4 left parenthesis a plus 13 right parenthesis

Exercise 6-29 (Algo) (LO6-5) Keith's Florists has 15 delivery trucks, used mainly to deliver flowers and flower arrangements in the Greenville, South Carolina, area. Of these 15 trucks, seven have brake problems. A sample of six trucks is randomly selected. What is the probability that two of those tested have defective brakes? (Round your answer
image text in transcribed

A food distributor buys fruit from local farmers, sorts it by quality, and then packages it to sell to larger grocers. This company is performing the distribution function of Multiple Choice product processing. breaking bulk. physical distribution. accumulating bulk determining variety

Chapter 3 in H & K discussed what they found in the survey LA pop survey data. Were the gender quotas visible in the countries they examined? Group of answer choices Yes, they were visible to citizens and they show empirical proof of this visibility. No, they weren't visible to citizens, and the authors show empirical proof of this. They could not

Heidi conducted research on success in mathematics. She found that perseverance, motivation, and number sense had a direct effect on mathematics success. Student attitudes about math had an indirect effect. An indirect effect refers to ______. Group of answer choices the effects of a variable directly on another the effect of the variable at the

Jika Anda memilih metode penelitian kuantitatif, maka: 1. Sebutkan lokasi penelitian Anda 2. Identifikasi dan jelaskan variabel penelitian Anda 3. Sebutkan populasi dan sampelnya 4. Jelaskan teknik pengambilan sampelnya, dan alasan Anda memilih teknik pengambilan sampel tersebut

Find the gradient of the function f=(x^2+y^2+z^2)e^{-\sqrt{x^2+y^2+z^2}}

Post a total of 3 substantive responses over 2 separate days for full participation. This includes your initial post and 2 replies to classmates or your faculty member. As you worked through the content from Week 3, you wrote down some reflections from the activities. Look back on your reflections and use them to help you share new ideas about the

THE QUESTIONS 3 + 4 ARE BASED ON THE FOLLOWING INFORMATION: A recent survey asked respondents about their monthly purchases of raffle tickets. The monthly expenditures, in dollars, of ten people who play the raffle are 23, 15, 11, 20, 28, 35, 13, 10, 20, and 24. 3) What can we say about the shape of the distribution of monthly purchases of raffle

Weak experimental research designs ______. Group of answer choices should be used in educational settings control confounding extraneous variables always have a control group do not control for confounding extraneous variables

The medical community unanimously agrees on the health benefits of regular exercise, but are adults listening? During each of the past 15 years, a polling organization has surveyed Americans about their exercise habits. In the most recent of these polls, slightly over half of all American adults reported that they exercise for 30 or more minutes
image text in transcribed

need help with 8 in 10 min please ASAP just in a simple form no need for long explanations. thank you \f
image text in transcribed

Suppose a large survey was given in Michigan to individuals who own a car. In this data set, we have the following two variables: Community type: rural, small town, suburban, urban, other Length of time you've owned the car (in years) Which is the more appropriate method to determine if there are statistically significant differences in average

Researchers want to determine how many times per week people walk their dogs. They select a representative sample of 250 dog owners and ask them about their dog walking habits over the last year. What type of bias might be a problem? Group of answer choices Measurement Desirability Selection Recall

Test the claim about the population mean u at the level of significance a. Assume the population is normally distributed. Claim: u
image text in transcribed

_____ are techniques of data generation and analysis that rely primarily on verbal rather than mathematical or statistical procedures. Multiple choice question. Quantitative methods Qualitative methods Polling methods Empirical methods

Solve the system of equations by the substitution method or elimination method. List your answers as points in the form (x, g). If there are no solutions, type "None". y =m27m+5 1 =ym Answer (separate by commas)
image text in transcribed

67 Take Quiz Exit [ Question 1 1. Alarge pizza chain is interested in knowing the proportion of adults who like pineapple on their pizza. Taking a random sample of 1650 adults, 659 said they like pineapple on their pizza. a. Construct a 90% confidence interval estimate of the proportion of adults who say that they like pineapple on their pizza. b.
image text in transcribedimage text in transcribed

Which of the following is the correct way to report the results of a hypothesis test and a measure of effect size using a t statistic? Question 31 options: t(19) = 2.30, r2 = 0.42, p < .05 t(19) = 2.30, p < .05, r2 = 0.42 r2 = 0.42, t(19) = 2.30 , p < .05 t = 2.30, df = 19, p < .05, r2 = 0.42

reporting bias of this study what type of risk of bias

The results section explains your findings in the experiment detail. It is important to present the results in "plain English" and accompany those results with statistics on Brain Asymmetry. In your synopsis, you will include: Organize the results: What are the results stating and how do they fit in with the experiment? What was your hypothesis?

Part 2 : Questions from Chapter 6 ( Some Advanced Trig Problems ); #7. In the drawing shown on the right, PQRS is a rectangle measuring 5 metres by 7 metres. Find the distance labeled "x" ( or in other words X the length of the line segment ST ), accurate to 4 significant digits. ( 10 marks ) W 5 m 61 R Q 7 m Ans
image text in transcribed

The dataset below consists of 5 examples described with 2 numeric features, Weight and Height. The class is Diabetes and has two values: yes and no. It describes patients in terms of their weight in kilograms and height in meters and whether or not they have diabetes. Weight Height Diabetes 1 68 1.7 yes 2 55 1.6 no 3 65 1.6 yes 4 100 1.9 yes 5 65

Showing 600 - 700 of 1499
  • 7 / 15