S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. february 2022
  6. 06

Mathematics Questions and Answers February 06, 2022

Expert-verified solutions to help you succeed

Please help with homework problem. A researcher was interested in studying if the severity of damage to people and/or property involved in an accident is associated with the type of vehicle(s) involved in the accident. He obtained the following data 'om the National Highway Trafc Safety Administration for accidents that occurred in 1999. The data
image text in transcribed

Need help solving Cost, Revenue & Profit Some account services will not be View available until you sign in again. For these problems, I will represent the number of items and y will represent the money. The fixed costs for a certain item are $180 per week. The cost to produce each item is $11 per item. Using this information, what is the cost
image text in transcribed

Engineers are testing company fleet vehicle fuel economy (miles per gallon) performance by using different types of fuel. One vehicle of each size is tested. Does this sample provide sufficient evidence to conclude that there is a significant difference in treatment means? 87 UOctane 89 Octane 91 Octane Ethanol 5% Ethanol 18% Compact 8.4 29.7 16.8
image text in transcribedimage text in transcribed

Based on the data in the following link, please fill in Table 1. Based on your learning in Practice 3, please fill in Tables 2 and 3. https://www.pro-football-reference.com/players/M/MahoPa00/gamelog/2020/ Game Comp Att Yds TD 1 24 32 211 3 2 27 47 302 2 3 31 42 385 4 4 19 29 236 2 5 22 43 340 2 6 21 26 225 2 7 15 23 200 1 8 31 42 416 5 9 30 45

11. If 4x - 9 0, find *-4 lim f (x) . (Hint: Show how you used the Squeeze Theorem on page 71 in your textbook to evaluate the required limit)
image text in transcribed

On a Likert scale, participants are required to Group of answer choices Place a check along an unnumbered line to indicate the degree of disagreement with a statement Choose the upper and lower limits to the rating scale Check one of five alternatives indicating various degrees of agreement or disagreement with a statement Circle a number on a

Which of the following data sets or plots could have a regression line with a negative y-intercept? Select the correct answer below: The difference in height between two twins (shorter twin - taller twin), plotted as a function of age. The number of people saved from a well, as a function of the number of years since the town was founded. The

Given the domain 0" S 9 S 360, the largest non-permissible value of 9 , to the nearest degree, for the identity sin6(sin6 -csc9)=sin29 -1 is
image text in transcribed

A student polls was completed to see if students in the school district are for or against the new legislation regarding school uniforms. 450 students were surveyed and it was determined 230 were against the new legislation. Calculate the EBP using a 90% confidence level, round to three decimal places.

D Question 5 1 pts Using Cohort 92 as the sample, what is the df (Degrees of Freedom) that we would need to use on the t-table for a one- sample t-test? O 109 O 108 O 110 O 100 D Question 6 1 pts From the t-table, what's the critical t-score for p = .05? Include all 3 numbers after the decimal point. D Question 7 1 pts Calculate the t-score: Your
image text in transcribedimage text in transcribedimage text in transcribed

A researcher is interested in whether number of hours of studying per week predicts college GPA. The researcher also is interested in whether number of extracurricular activities and number of roommates adds to prediction of college GPA, once number of hours of studying per week is taken into consideration. The researcher collects data from 35

For the following data (a) display the data in a scatter plot, (b) calculate the correlation coefficient r, and (c) make a conclusion about the type of correlation. The ages (in years) of 6 children and the number of words in their vocabulary Age, x 3 4 Vocabulary size, y 450 450 1400 1300 2250 2100 (a) Choose the correct scatter plot below OA.
image text in transcribed

What is the definition of qualitative data? What data points from this exercise were considered qualitative

___________ is the best means for presenting data for quick visualization of relationships. Group of answer choices Frequency Distribution Table Graphs Variable

Exercises 13.1 For years, the state of Illinois has administered the Illinois State Aptitude Test (ISAT) to third, fifth, and eighth graders. For much of this time, the test was relatively low stakesnot tied to promotion to the next grade, teacher com- pensation, school resources, and so on. The stakes changed in 2002, when the ISAT became the
image text in transcribed

All of the mares in the stable ___ new horseshoes. need needs

Allie has developed a theory concerning test grades. She posits that there is a relationship between her frequency of study and the resulting grade. In order to test her theory, she has to generate a(n) Multiple Choice O theory. O inference hypothesis. O research

7 5-1. The data shown here are x and R values for 24 samples of size n = 5 taken from a process producing bearings. The mea- surements are made on the inside diam- eter of the bearing, with only the last three decimals recorded (i.e., 34.5 should be 0.50345). Sample Sample Number R Number HI R 34.5 13 35.4 34.2 4 14 34.0 6 31.6 4 15 37.1 31.5 4
image text in transcribed

Select the best explanation for how one sample would be simulated in order to generate the null distribution. Put each pair (brain size, IQ) on a piece of paper. Draw with replacement 40 times. Plot the correlation coefficient of the resampled data on the null distribution. Holding the order of brain size values constant, randomize the order of

Submit Answer 37. [-/0.13 Points] DETAILS LARMPMT1 11.1.022. 0/100 Submissions Used Proportions can be used to convert units. For example, to convert 250 centimeters to meters, you set up the proportion 1 m x m 100 cm 250 cm Use proportions as described above to convert each of the following. (If necessary, round your answers to one decimal
image text in transcribed

Why do scientists run multiple repeats for the same experiment? Select one or more: a. The experiment needs to be done more than once due to the potential for variation and it needs to be verified more than once. 4 O b. Randomizing experiments is never really important. c. Increasing the number of items, or people, that you are collecting data

The following data represents the number of televisions sold per day at a particular wholesale store over a random sample of five business days. 9 2 7 7 5 What is the range of this sample? A. 6 B. 8 C. 7 D. 5

According to a researchinstitution, the average hotel price in a certain year was $ 97.27 . Assume the population standard deviation is $ 21.00 and that a random sample of 30 hotels was selected. Complete parts a through d below. a. Calculate the standard error of the mean. =$ b. What is the probability that the sample mean will be less than $ 100

Are all data sets best described with graphs? Talk about when a data set might not benefit from being displayed graphically.

Of 7,000 respondents, 3,128 women and 1,892 men said yes to having eating disorders. Do you test using sample proportions or sample means

The sides of a small rectangular box are measured to be (1.90 0.01) cm, (2.10 0.02) cm, and (3.0 0.1) cm long. Calculate its volume and uncertainty in cm3

What percentage of all systems implementations in North America is believed to fail? Group of answer choices 10. 75. 50. 25

In qualitative research, the unit of analysis is Group of answer choices the object(s) about which the researcher would like to answer a research question. the core idea of the study's research question. the number of participants in a study. the number of research questions in the study

Given the confusion matrices below, Which of the following statement is true? A. Model M1 has higher Precision and Model M2 has higher Recall. B. Model M1 has higher Recall and Model M2 has higher Precision. C. Model M1 has higher Precision and higher Recall. D. Model M2 has higher Precision and higher Recall. Table 5.8. Confusion matrix for two

What is the technique used by scientists to standardize the normal curve? What is the technique used by scientists to standardize the normal curve? converting the probabilities into basic percentages so the curve can be streamlined, facilitating further analyses applying the standardized probability means to each curve converting a distribution's

Please help me out here and label the answers clearly. For questions 1 - 3, the polar coordinates of a point are given. Find the rectangular coordinates of each point. (2 points each) 1. [237'] For questions 4 6, the rectangular coordinates of a point are given. Find the polar coordinates of each point. (2 points each) 4. (4, 0) 5. (3, 4) 6. (2,
image text in transcribedimage text in transcribedimage text in transcribed

THANKS SO MUCH Given the following discrete probability distribution: X 1 2 4 5 9 15 P(X) 0.13 0.18 0.23 0.31 0.09 0.06 (a) Compute the expected value and the variance for this distribution. (3 marks) (b) Determine the median and the mode for this distribution. Comment on the shape of this distribution with a reason to support your conclusion. (4
image text in transcribed

A student at a junior college conducted a survey of 20 randomly selectedfull-time students to determine the relation between the number of hours of video game playing eachweek, x, andgrade-point average, y. She found that a linear relation exists between the two variables. Theleast-squares regression line that describes this relation is

Let us suppose that section 7 of this course has 40 students enrolled, 12 of whom enjoy learning Spanish. Let us also suppose that section 8 of this course also has 40 students enrolled, 23 of whom enjoy learning Spanish. What we're observing here is an example of

Please box answers a(x,y) Solve the system u = 3x - y, v= 2x + y for x and y in terms of u and v. Then find the value of the Jacobian - a(u, v) Find the image under the transformation of the triangular region with vertices (0,0), (1,3), and (1, - 2) in the xy-plane. Sketch the transformed region in the uv-plane. The function for x in terms of u
image text in transcribed

Please solve. This is my howe work The table below lists the areas (in square kilometers) of all 20 counties in eastern Washington. county area Adams 4986 Asotin 1647 Benton 4411 Chelan 7567 Columbia 2250 Douglas 4715 Ferry 5708 Franklin 3217 Garfield 1840 Grant 6932 Kittitas 5948 Klickitat 4850 Lincoln 5986 Okanogan 13645 Pend Oreille 3627
image text in transcribed

9) A study classified a group of adults, their need to wear glasses, as follows: Used glasses to read It was determined that Yes No they needed glasses Yes .45 15 No 05 50 If only one adult is selected from that group, determine the probability: a) That the adult needs glasses. b) That the adult needs reading glasses but does not use them. c) The
image text in transcribed

In a survey of 3500 adults (18 and over) who reside in California, 2339 were found to like outdoor sports. Construct a confidence estimate for the true proportion of adults who live in California and who like outdoor sports. Use a confidence level of 99%. Write your answer EXACTLY as is given by Excel. Do not round. The lower limit is A . The

The CCMA instructed unions to submit picketing areas nationally in two weeks so picketing rules can be drafted and the certificate can be issued." Which terms do you think the parties will agree upon in the picketing agreement? Substantiate your answer by referring to the provisions of the LRA in terms of picketing.

I need to do stastics reasarch project in college.I have to conduct resasarch study ( i want to talk about effect on mental health before and during covid -19 pandemic. ' i am thinking of comparing mental heath before and during pandemic. . how can i comapre it with past mental heath report . caI need suggestion coming up with a Resarch question

Given the following data:57121620 Find the 20 th percentile score.

Based on the following confusion matrix, answer the following question: Default Prediction Model Actual Yes No Predicted Yes 138 181 No 128 553 Target Variable: Response to an offer (Yes, No ) Important Group: Yes What is sensitivity or Recall (%)? Group of answer choices 62.7 51.9 75.3 48.1

1.The U.S. Census Bureau needs to estimate the median income of females in the U.S.They collect incomes from 3500 females.State the variable, individual, population, sample, parameter, and statistic: a.Female in the US b.Income of a female in the US c.Set of income responses from all females in the US d.Set of income responses from 3500 females in

Please help me for these questions, thank you. Consider a population that has N=4 units. Data on two variables Y (variable of interest) and X (auxiliary variable) are recorded for all the units in the population and summarized below: Unit | 1 2 3 4 X 67 63 66 69 Y 68 62 64 70 Using the data: t, = 265,t, = 264, S} = 6.25, 57 = 13.33. 1. Consider
image text in transcribedimage text in transcribedimage text in transcribed

PS=3x+2, SQ=4x-5, PQ=39. Is S the midpoint of PQ? Justify your answer?

Use StatCrunch to Answer the Following: A study of stress, during COVID-19, on your community college campus, reported a mean stress level of 78 (on a 0 to 100 scale with a higher score indicating more stress), a sample standard deviation of 16 with a margin of error of 4 for 95% confidence. The study was based on a random sample of 64
image text in transcribed

The accompanying data aredrive-through service times(seconds) recorded at a fast food restaurant during dinner times. Assuming that dinner service times at therestaurant's competitor have standard deviation =46.5 sec, use a 0.025 significance level to test the claim that service times at the restaurant have the same variation as service times at

A company claims that its medicine, Brand X, provides faster relief from pain than another company's medicine, Brand Y. A researcher tested both brands of medicine on two groups of randomly selected patients. The sample sizes, sample means and population standard deviations are given below Brand X Y Sample Size n = 50 n = 55 Sample Mean

Questions a through i? Does the linear plot tell you everything you need to know? Simple linear regression results: Dependent Variable: Salinity Independent Variable: Temp Salinity = 34.99979 - 0.17751936 Temp Sample size: 392 R ( correlation coefficient) = -0.91913186 R-sq = 0.84480338 Estimate of error standard deviation: 0.22419731 Parameter
image text in transcribedimage text in transcribedimage text in transcribed

You are interested in the benefits of different types of technology training on teachers' technology skills, use, and their attitude regarding instrucitonal technologies. You are in the unique position to be able to study all of the teachers in a regional unit that houses seveal districts. You therefore can conduct the research any way that you

A population has a mean mu equals 83 and a standard deviation sigma equals 12 . Find the mean and standard deviation of a sampling distribution of sample means with sample size nequals 36 .

The fabled urn of WhoDunk contains millions of red and blue marbles 68% of the marbles are blue and 32% of the marbles are red. Each marble is also labeled with an M or an N (but not both) 94% of the red marbles and 1% of the blue marbles are labeled M (all the rest are labeled N). A single marble is selected at random. . . a. What is the

Find the sample size needed to estimate the percentage of people who have at least one pet at home. Use a 2.3% margin of error; use a confidence level of 95%. Write your answer EXACTLY as is given by Excel. Do not round. The minimum sample size needed is A

Calculate the availability of a component in percent that has an mtbf value of 10000 hours and mttr value of 2 hours

To get to work, a commuter must cross train tracks. The time the train arrives varies slightly from day to day, but the commuter estimates he'll get stopped on about 15% of work days. I have been asked to show all of my work for the following. During a certain 5-day work week, what is the probability that he a) Gets stopped on Monday and then

Are people moving away from having a traditional landline telephone in their homes? A recent report stated that 58% of U.S. households still have a landline telephone. Suppose a random sample of 200 homes was taken and a resident of the home was asked, "Do you have a traditional telephone in your place of residence?" Further suppose that of those

The data below are the average monthly temperatures, in F, and the monthly natural gas consumption, in ccf, for a household in northwestern Pennsylvania. Test the significance of the correlation coefficient using a =0.05 and the claim P < 0. Temperature (x) 47 3521 273948 61 65 70 Consumption (y) 34 169 248 134 137 100 19 34 12 Find out the

A CEO meets with an average of 1.9 people per hour, with a standard deviation of 0.4. Her administrative assistant installed new scheduling software. He kept track of how many people the CEO met with for the next 15 hours, and it averaged 2.3 people. The assistant wants to know if the new scheduling software made a positive difference.

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 what is the mean of sampling distributuion

A company is criticized because only 13 of 43 in executive-level positions are women. The company explains that although this proportion is lower than it might wish, it's not surprising given that only 40% of their employees are women. What do you think? Is the company correct? Draft an appropriate hypothesis to test this assumption. Test your

Let N be a Poisson() random variable. We observe N, say it equals n, we then throw a p-biased coin n times and let X be the number of heads we get. Show that X is a Poisson(p) random variable. (You can use the following identity: k=0 y^k / k! = e^y 4. Let N be a Poisson (1) random variable. We observe N, say it equals n, we then throw a p-biased
image text in transcribed

A study published by Foreman-Wisely and colleagues discovered that 37% of domestic cats in the U.S. are allowed to go outside. Suppose we select a random sample of six domestic cats in the U.S. What is the probability that exactly one is allowed to go outside? You must use one of the calculator functions from the cheat sheet in the Exam II folder.

A brand name has a 90% recognition rate. If the owner of the brand wants to verify that rate by beginning with a small sample of 10 randomly selected consumers, find the probability that exactly 9 of the 10 consumers recognize the brand name, Also find the probability that the number who recognize the brand name is not 9.

For the discussion, please select a peer reviewed scientific article from the library or other source and review it for your classmates. The review should contain the following: Summary Population Sample Parameters Confidence interval Type of test Statistical power/effect size Results Interpretation of the statistical testing

I couldn't figure out this homework exercise for my biostats class Translation: Percutaneous anephrolithotomy (PN) is a surgical procedure to remove a kidney stone by a small puncture through the skin. The authors of an article in the British Medical Journal [14] investigated the effectiveness of NP in the removal of renal calculi. less than
image text in transcribed

Provide at least 2 lines of Evidence that support that it is a normal fault

is 4 24. The slope of the line normal to the graph of y = 2In (secx) at x = =
image text in transcribed

Analysis - eN Practice Proble.. Sp 5 Agenda |... College of Cha... Files & Folders... Context | Cour... Inbox - arbarre... 18 - - Review a... Google Docs 2.1-2.3 Quiz End Behavior 47:34 Time Remaining Return Next 7 5 points Using the following function, please fill in the blanks. f (z) = 325 + 1124 - 2023 (please use the ^ symbol for exponents,
image text in transcribed

Need Urgent. Check comments from time to time for additional instructions 1. Measurements are collected from 100 subjects from each of two sources. The data yield the following frequency histograms. The number above each rectangle is its height. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Source 1 1 1 2 3 4 5 7 8 9 10 11 2 3 4 5 7 8 9 10 5 6 7 8 9 10 11

Experiment 1: Does early exposure to school affect IQ? An educator wants to determine whether early exposure to school will affect IQ. He enlists the aid of the parents of 24 of preschool-age children to participate in this experiment, 12 children go to preschool and 12 children stay home. At the end of 2 years, the IQs of all the children are

1 Which of the following statements correctly describe data and data analysis? Select all that apply. Data is a collection of facts. Correct Data analysis is creating new ways of understanding the unknown using raw data. Data analysis involves collecting, transforming, and organizing data. Correct One goal of data analysis is to draw conclusions.

\f
image text in transcribed

The definition that best describes the weighted average of all the possible outcomes of a probability distribution is known as the: Group of answer choices Mode Median Mean Expected value

According to a CBS news poll, 86% of Americans believe in true love. Suppose we randomly selected 20 Americans. Find the probability that fewer than 15 of them believe in true love

A study compared different psychological therapies for teenage girls suffering from anorexia, an eating disorder that causes them to become dangerously underweight. Each girl's weight was measured before and after a period of therapy. The variable of interest was the weight change, defined as weight at the end of the study minus weight at the

Please help with homework problem. What is the chi-square test statistic value for the contingency table given below?(round off to two decimal place) O 8.10 O 8.01 None of the above \\ /
image text in transcribed

I need help with the two questions below. Based on information about the Miami Heat Basketball team, throughout the years 2010 and 2011, the members of the team had a mean number of free throws attempted of 27.9 with a standard deviation of 7.83. Over a ten-year period, the mean number of free throws attempted by all NBA teams is 25.0. 1.
image text in transcribed

3 A large number of insurance records are to be examined to develop a model for predicting fraudulent claims.Of the claims in the historical database,1%were judged to be fraudulent (class 1). A sample database is taken to develop a model,and oversampling is used to provide a balanced sample in light of the very low response rate.When applied to

Based on the regression model in Part 1, what is a practical interpretation of the coefficient of DISTANCE? Group of answer choices The average fare equals $83.97. The average fare equals $0.08. For each additional mile of distance, fare increases by $0.08 on average. For each additional mile of distance, fare decreases by $0.08 on average. For

1) Assuming the binomial distribution is appropriate, if N = 6 and P = 0.50, the probability of getting exactly 5 P events = _________. I have no clue what formula to use to get the answer. 2)During the past 5 years there has been an inflationary trend. Listed below is the average cost of a gallon of milk for each year. 1981 $1.10 1982 $1.23 1983

In a multiple regression model, with variables x1, x2 and x3, which of the following actions would most likely make the standard error of the slope for x2 decrease? Explain why? A) Increase the sample size by a factor of two. B) Decrease the sample size by a half. C) Remove any points that are leveraged with respect to the x2 variable. D) Remove

solve the question The tensile strength of silicone rubber is thought to be a function of curing temperature. A study was carried out in which samples of 12 specimens of the rubber were prepared using curing temperatures of 20 C and 45 C. The data below show the tensile strength values in megapascals. 20 C: 2.07 2.14 2.22 2.03 2.21 2.03 2.05 2.18
image text in transcribedimage text in transcribedimage text in transcribed

What would have to happen for us to gain increased confidence in the results of this study?

Determine whether the following individual events are overlapping or non-overlapping. Then find the probability of the combined event. Getting a sum of either 7, 9, or 11 on a roll of two dice

Means Tables for Main Effects and Interactions For Question 4, calculate the marginal means for Snack Type as well as the marginal means for Font Style. Put those values in the appropriate boxes. Means Table for 2x2 Factorial ANOVA FONT STYLE Arial Times New Roman Marginal Means for Snacks below SNACK TYPE Salty 2 2 Sweet 5 5 Marginal Means for

STATISTICAL REASONING FOR THE HEALTH SCIENCES- MASTERY WIGGINS Week 5 Assignment: A... CURRENT OBJECTIVE Use the normal distribution to compute probability with technology - Excel Question A worn, poorly set-up machine is observed to produce components whose length X follows a normal distribution with a mean equal to 14 centimeters and a variance

The accompanying table is from a study conducted with the stated objective of addressing cell phone safety by understanding why people use a particular ear for cell phone use. The goal was to determine whether the ear choice is associated with auditory or language brain hemispheric dominance. Assume that one wants to test the claim that handedness

. () = 9^4 + 142^3 + 102^2 1386 + 3 has a maximum or minimum at the points where = 1.5 and where = 7/3 . Use instantaneous rates of change to verify this, and to classify each as a maximum or a minimum.

What is the difference between the null hypothesis and the alternative hypothesis?

Students may alternate work experience and classes with a(n)

Select a data collection method of your choice. Write a measurable and precise objective that can be measured through the method you selected. Then, provide the justification (e.g., pros and cons) for your choices. Last, provide and briefly discuss one additional data method that could work to measure the objective you provided

The false statement about the identity sinx secx = tanx is Select one: O a. Substituting in any value for the variable, other than a non-permissible value, will result in both sides of the equation being equal. O b. The permissible values will always produce identical values on both sides of the equation. O c. The non-permissible values will
image text in transcribed

Test the given claim. Assume that a simple random sample is selected from a normally distributed population. Use either theP-value method or the traditional method of testing hypotheses. Company A uses a new production method to manufacture aircraft altimeters. A simple random sample of new altimeters resulted in errors listed below. Use a 0.05

Se utilizar un conjunto de datos que contiene un ejemplo de 40 estudiantes diestros de introduccin a la psicologa anglosajona de la una gran universidad de Southwestern. Los sujetos realizaron cuatro pruebas secundarias (vocabulario, similitudes, diseo de bloque y finalizacin de imagen) de la Escala Wechsler de Inteligencia para Adultos (1981)

Caso hipottico: Mi cliente est en un proceso civil por la guarda y custodia de su hijo. Al elaborar la demanda, el abogado le pidi le escribiera una narrativa de los hechos desde el nacimiento del menor. Con la narrativa se estructur una demanda que el juez ley y ste respondi declarando que le otorgaba las peticiones de la demanda. A su vez, la

Suppose you have 3 jars with the following contents. Jar 1 has 2 white balls and 1 black ball. Jar 2 has 1 white ball and 2 black balls. Jar 3 has 1 white ball and 1 black ball. One jar is to be selected, and then 1 ball is to be drawn from the selected jar. The probabilities of selecting thefirst, second, and third jars are1/3, 1/2, and 1/6

Determine the average rate of change of in the function over the interval [3, 5]. Bold text start[5 marks]

How is the principle of maximum entropy related to the maximum likelihood principle in statistics? Select one: a. They are independent of each other b. The principle of maximum entropy is a special case of the maximum likelihood principle c. The maximum likelihood principle is a special case of the principle of maximum entropy d. They are

points) possible A formula for the relationship between weight and blood pressure in children is given by the formula below where P(x) is measured in millimeters of mercury and x is measured in pounds. Use the formula to answer the questions. P(x) = 12.9(2 + In x) 10 SXS 100 . . . What is the rate of change of blood pressure with respect to weight
image text in transcribed

Determine whether the statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. If an event is certain to occur, its probability is 1. Question content area bottom Part 1 Choose the correct answer below. A. This statement is false. To make this statement true, change "1" to "4". B. This

Showing 600 - 700 of 1503
  • 7 / 16