S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. march 2023
  6. 11

Mathematics Questions and Answers March 11, 2023

Expert-verified solutions to help you succeed

Identify a business problem or opportunity at a company where you work or with which you're familiar. This will be a business problem that you use for the individual assignments in Weeks 3-5. It should be a problem/opportunity for which gathering and analyzing some type of data would help you understand the problem/opportunity better. Identify a

ANOVA: Show work in EXCEL. USC wants to use a new tutorial to teach the students about business ethics. As an experiment the administrator randomly selected 15 students and randomly assigned them to one of three groups which include either a PowerPoint presentation created by the faculty, AuthorGen Presentation created by the faculty, or a well

In Summit County, 60% of the voter population are Democrats. What is the probability that a random sample of ten Summit County voters will contain: (a) Exactly six Democrats (b) At least seven Democrats (c) No Democrats (d) All Democrats

A vertical pole fixed to the ground is divided in the ratio 1:9 by a mark on it with lower part shorter than the upper part. If the two parts subtend equal angles at a place on the ground, 15 m away from the base of the pole, what is the height of the pole? A. 60 5 m B. 15 5 m C. 15 3 m D. 60 3 m

In one hybridization experiment, 8178 offspring peas were obtained, and 24.67 % of them had green flowers. The others had white flowers. Consider a hypothesis test that uses a 0.05 significance level to test the claim thatgreen-flowered peas occur at a rate of 26 %.a. What is the test statistic?

It is believed that the average amount of money spent per U.S. household per week on food is about $97, with standard deviation $12. A random sample of 25 households in a certain affluent community yields a mean weekly food budget of $100. We want to test the hypothesis that the mean weekly food budget for all households in this community is

Accessibility + Language + On-Screen Keyboard + About + Input The equation used to predict the total body weight (in pounds) of a female athlete at a certain school is ModifyingAbove y with caret equals negative 113 plus 3.51 x 1 plus 1.85 x 2y=113+3.51x1+1.85x2,where x1 is the female athlete's height (in inches) and x2 is the female athlete's

Suponga que la probabilidad de cometer un error de tipo II es igual a 0.0845; cul es la probabilidad de rechazar correctamente Ho cuando es falsa? Es decir, determine la potencia de la prueba. a) 0.0845 b) 0.9155 c) 0.0155 d) No se puede determinar Hello, I need a tutor that understands Spanish and statistics... I have the following questions De

It is known that, nationally, doctors working for HMOs average 13.5 years of experience in their specialties, with a standard deviation of 7.6 years. The distribution is a normal distribution. The executive director of an HMO in a western state is interested in determining whether or not its doctors have less experience than the national average.

Suppose X has an exponential distribution with lambda= 2 . Determine the following: (a) P (X = < 0 ) (b) P (X => 2) (c) P (X= <1) (d) P (1

n=50 p=0.3 find mean variance and and standard deviation

You want to test whether your business costs are statistically different from last year. You sample100 products that you buy and take the differences in prices. The mean difference in price is $.45,and the standard deviation is $4.76. You interpret this standard deviation as the population standarddeviation. (a) What is the hypothesis that you

If is assigned the value 0.001, what are we saying about the type I error? If is assigned the value of 0.05, what are we saying about the type II error?

\f

1. A local drugstore owner knows that, on average, 20 people enter his store eachhour, assume that the number of people that come into the store follows a Poissonprocess. (a) Find the probability that at least 10 people will come to the store in 30 minutes. (b) Find the probability that at least 5 people will come to the store in 15 minutes. 2. A

It appears that the imports of carbon black have been increasing by about 10% annually. Imports Imports of Carbon Black of Carbon Black Year (thousands of tons) Year (thousands of tons) 2006 93 2010 132 2007 106 2011 145 2008 116 2012 166 2009 129 2013 187 a. Determinethe logarithmic trend equation.(Round your answers to 4decimal places.) =+t,

1. A recent magazine article claimed that \"our survey results using a random sample indicate that, on average, American adults watch between 75 and 77 minutes of television per day.\" a. What is the population of interest in this example? - b. Based on the reported confidence interval, what is the average amount of time spent watching TV for the

4 3 2 1. Factor ! f ( x ) = x + x 8 x + 6 x + 36 completely. Then sketch the graph

Stat 2000 In Vancouver, 42% of the days are rainy. Mary takes the bus 65% of the days. On 37% of days, she takes the bus and the weather is rainy. What is the probability that she takes the bus if the weather is not rainy?

Confidence interval for the difference of population means: Use of the standard normal For a study conducted by the research department of a pharmaceutical company, 290 randomly selected individuals were asked to report the amount of money they spend annually on prescription allergy relief medication. The sample mean was found to be $17.50 with a

A clinical trial is conducted comparing a new pain medication for arthritis. Participants are randomly assigned to receive the new medication or a placebo. The outcome is pain relief within 30 minutes. The data are shown in the table below: Pain Relief No Pain Relief New Medication 44 76 Placebo 21 99 A) Estimate the odds ratio in pain relief

Given that n = 6 and p = 0.95 (in a binomial probability distribution), find the following probabilities: a. The probability of exactly 2 successes. b. The probability of at least 2 successes.

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

(Will not be accepted without staple) [First Name] [Last Name] Math-2417, thq 08, 13-10-16, 10:13 [Net ID] [Problem Section] Instructions: 1. Fill in the requested information on the line above. 2. This handout is due at the beginning of problem section. 3. This handout must be printed out and stapled. You may print it double sided. 4. Your work

Pretend you own a company that sells items over the Internet. You decide that shipping costs will be based on the total weight of a customer's purchase. Write a piecewise function for your shipping charges. Include from three to five weight intervals. Post your store name, briefly describe the types of items you sell (for example, pet toys), and

Calculate d 2 y dx 2 .y=0.5x 0.3 i need to find d 2 y dx 2 =

A random sample of sizen= 290 is taken from a population with population proportionP= 0.75. a. Calculate the expected value and the standard error for the sampling distribution of the sample proportion.(Round "expected value" to 2 decimal places and "standard error" to 4 decimal places.) Expected value Standard error b. What is the probability

ID Salary Compa Midpoint Age 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 60.8 26.1 35.4 61.3 46.8 74 41.8 22.5 82.5 23 24.1 65.1 42 23.9 23.7 35.7 71 34.4 24.9 34.2 76.8 62.1 22.7 49.4 24.5 23.2 46.9 77.3 77.7 46.7 23.1 29 63.8 28.1 23.4 23.3 23.5 59.3 1.066 57 31 31 57 48 67 40 23 67 23

A dose of morphine is absorbed from the bloodstream of a patient at a rate proportional to the amount in the bloodstream. (a) Write a dierential equation for M????t, the amount of morphine in the patients bloodstream, using k as the constant proportionality. (b) Assuming that the initial dose of morphine is M0, solve the initial value problem to

Calculate the p-value for the following conditions and determine whether or not to reject the null hypothesis. a)one-tail test, zx=1.50, and =0.01 b)one-tail test, zx=negative -2.85, and=0.10 c)two tailtest,zx=2.10, and =0.01 d)two-tail test, zx-=-1.39, and =0.05 a) The p-value is ____ (Round to four decimal places asneeded.) Since=0.01, (Reject

Respond to one of the two following questions. Response must be 250-400 words FIRST QUESTION option: TRUSTING THE RESULTS. If you were to read the results of a study showing that daily use of a certain exercise machine resulted in an average 10-pound weight loss, what would you want to know about the numbers in addition to the average? SECOND

Catherine Chao, Director of Marketing Research, is evaluating consumer acceptance of alternative toothpaste packages. She wonders whether acceptance is influenced by children in the household. Her staff prepared the following contingency table from a random sample of 100 households. Children in Household Pre-teenagers teenagers none Preferred Pump

A presidential candidate has decided to enter primaries in those states in which at least 20% of voters support her. Random samples of 200 voters were taken in each of a number of states. In New Hampshire, 30 voters supported the candidate. Test at a 5%(0.05) level of significance to determine whether the candidate should enter the New Hampshire

What price do farmers get for their watermelon crops? In the third week of July, a random sample of42farming regions gave a sample mean ofx= $6.88per 100 pounds of watermelon. Assume thatis known to be$1.86per 100 pounds. (a) Find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for their

\f

find the area under the standard normal distribution curve between z=0.24 and z=-1.12. explain how

\f

\f

Week 2 Assume that the hourly cost to operate a commercial airplane follows the normal distribution with a mean of $3,985 per hour and a standard deviation of $440. What is the operating cost for the lowest 2% of the airplanes? (Round z value to 2 decimal places and round final answer to nearest whole dollar.)

PART A ( show the steps ) 1. Calculate the number of integers divisible by 4 between 50 and 500, inclusive. 2. Hexadecimal digits are formed using either a numeric decimal digit or a letter from A to F. How many possible digits can be chosen? Did you use the sum rule or the product rule? 3. A combination lock requires three numbers from 1 to 25.

Fully explain the relationship between reliability and validity. Note: Use your own words. NO copied and pasted are allowed. For any words that are not yours, please cite them and provide the references at the end. We use turnitin to determine similarities to other answers. Thank you.

Please answer and explain why? Thank you! The average annual salary of employees at Wintertime Sports was $28,750 last year . This year the company opened another store. Suppose a random sample of 18 employees gave an average annual salary of $25,810 with sample standard deviation s = $4230 . Find the p-value for a test intending to show that the

Explain the simple linear regression model, objective function, constraints and so on in detail! What are some ways linear regression can be applied in the business world? minimum 250 words. no plagiarism, please cite resources. thanks,

In the 1960's a group medical practice (Health Insurance Plan or HIP) undertook a large scale randomized trial to evaluate the eectiveness of mammography. There were 62000 subjects in the experiment (women members of HIP aged 40-64) of whom 31000 were randomly selected to be the control group and the other half were randomized into treatment (i.e.

In a hospital study, it was found that the standard deviation of the sound levels from 20 randomly selected areas designated "casualty doors" was 4.1 dBA and the standard deviation of 24 randomly selected areas designated as "operating theaters" was 7.5 dBA. At = 0.05, can you substantiate theclaim that there is a difference in the standard

Maximizing Profit A company is interested (naturally) in determining the number of items to manufacture in order to maximize their profits. To make this determination, we need to find the difference between the companys revenues and costs. In basic economics, a typical cost function is given by a cubic polynomial, i.e., a function of the form

\f

If Z is a standard normal random variable, then the value z for which P(-z < Z < z) equals 0.8764 is A.3.08 B.1.54 C.0.3764 D.1.16 How do you get the result?

A recent survey found that72% of all adults over 50 wear glasses for driving. You randomly select33adults over 50, and ask if he or she wears glasses. Decide whether you can use the normal distribution to approximate the binomial distribution. If so, find the mean and standard deviation, If not, explain why.

You have collected data from a sample of a population. You want to use this sample to estimate a parameter of the population. To do this, you will use the methods of ______________. Select one: a. Descriptive statisticsb. Inferential statisticsc. The decision making processd. Business forecasting

A company is criticized because only 20 of 49 executives at a local branch are women. The company explains that although this proportion is lower than it might wish, it's not a surprising value given that only 45% of all its employees are women. The company has more than 500 executives worldwide. Test an appropriate hypothesis and state the

(Fit: zu

The Police Department is investigating the need for a speed camera to be implemented on Hasty Road. A sample of 40 cars passing through that road on a particular day were randomly selected and their speeds recorded. The speed limit on Hasty Road is60 miles per hour (mph). The mean speed for the sample was calculated as42 mph. The standard

\f

Let Z be a standard normal random variable. Calculate the following probabilities using the calculator provided. Round your responses to at least three decimal places. P (Z>1.71)= P (Z_ < -2.04)= ^^That is a less than or equal to sign, couldn't find on keyboard how to type it. P (1.12

source between groups within groups total df 2 9 11 ss 22.167 14.75 36.917 stress level minimal moderate high mean 3 4 6 N 4 4 4 =FINV(0.05,2,9) =FINV(0.01,2,9) F 6.7628135593 comparision A to B A to C B to C Absolute difference 1 3 2 4.256495 8.021517 critical range = mss 11.0835 1.6388888889 3.3560909091 2.527417 stress level minimal (A)

A stock index fund invests in a very large number of different stocks, so the return you get from it is roughly the average return for the stocks in the index. 1. Which of these two choices would give you a better chance of tripling your money within a month: investing all your money in the index fund, or investing all your money in a few randomly

A new screening test for Ebolais developed for use in rural communities throughout high-risk areas of Western Africa. The sensitivity and specificity of the new test are ~55% and ~73%, respectively. Within the first two weeks of use in the field, five hundred and fifty people are screened at their local clinic. Assume the true prevalence of Ebola

HHS is also concerned about the cost of prescription medications for Alzheimers patients. On average, it costs a patient $240 every time they fill a prescription. The standard deviation is $30. Assume that prescription costs are normally distributed. What is the probability that a randomly selected prescription will cost less than $175 to fill?

2. Your company prepares and distributes frozen foods. The package claims a net weight of 24.5 ounces. A random sample of today's production was weighted, and the results were summarized as follows: average = 24.41 ounces, standard deviation = 0.11 ounce, sample size = 5 packages. Find the two-sided 95% confidence interval for the mean weight you

In this activity you will investigate the differences between two major brands of soda pop. (Example Pepsi Vs. Coke, Orange Crush Vs. Kroger Orange, A&W Vs. Kroger Root Beer, etc ...) 1. What populations are you studying? 2. To compare, decide if you want to use independent (10.1, 10.2) or matched sampling (10.3). Which would be better and why?

This assignment demonstrates factor analysis and multidimensional scaling (MDS) which are procedures for obtaining perceptual maps. Suppose you were advising a close friend of yours who is considering joining an MBA program. Assume that your friend is very similar to you in terms of background, interests, and career plans. You are helping your

Show work for all please. 1. Simplify the radical expression and show your work: 3/2+5 2.If f(x)= 4x-1 and g(x)= 5x, what is (f g)(7)? 3. Which two end behaviors are true of the following function? h(t) = 2t 4 - t 3 + 6t 2 + 2t - 8 A) As t , h(t) B) As t , h(t) - C) As t -. h(t) D) As t -, h(t) -

A researcher wonders whether talking to plants keeps them from dying, and conducts a study in which he talks to one group of five plants and do not talk to a second group of five plants. After two weeks the researcher records how many plants have died in each group. This number is a ___ variable, which means that the data can be analyzed using a

For this task, use an MS Word document to provide short answers to the following questions. Name the file in the following format: lastnamefirstinitialEDU8006-8-7.doc (example: smithbEDU8006-8-7A.doc). Complete the following: What are the most common reasons you would select a non-parametric test over the parametric alternative? Discuss the issue

How do you find the antiderivative and derivative of y = x ^ 3 ?

What is the formula for finding probability of an event?

A granola bar manufacturer states that their granola bars contain 28 grams of carbohydrates per bar. A sample of five granola bars is tested and a mean of 28.2g is obtained with a standard deviation of 2.7g. If carbohydrate content is normally distributed, the 95% confidence interval for the mean carbohydrate content of all such granola bars made

A study was done to explore the number of chocolate bars consumed by 16-year-old girls in a month's time. The results are shown below. Number of Chocolate Bars Consumed 56 46 12 62 39 24 59 51 39 52 28 41 10 64 27 0 34 5 55 32 42 24 14 63 1 63 52 58 52 26 Use the data from the chocolate bar study to answer the following questions. Use SPSS for all

[Uncertain Scenario Maximizing the Mean] The potential revenues of all projects are in fact uncertain. The company determines that the revenue for project 1 is following a uniform distribution ranging from $1,200,000 to $2,000,000. The revenue for project 2 is distributed normally, with a mean of $1,500,000 and a standard deviation of $200,000.

Joseph King has ambitions to be mayor of Williston, North Dakota. Joe has determined the breakdown of the steps to the nomination and has estimated normal and crash costs and times for the campaign as follows (times are in weeks). Normal Crash Immediate Activity Time Cost Time Cost Predecessors A. Solicit Volunteers 6 $5,000 4 $ 9,000 --- B.

An auditor for a hardware store chain wished to compare the efficiency of two different auditing techniques. To do this he selected a sample of nine store accounts and applied auditing techniques A and B to each of the nine accounts selected. The number of errors found in each of techniques A and B is listed in the table below Errors in A Errors

Will today's children be better off than their parents? Not sure Not sure Not sure Not sure Yes No No No No No Yes No No Yes No Yes No No No No No No No Yes No Not sure Not sure No Not sure Yes Yes Not sure No No No No No No Not sure No Yes Not sure Yes No Not sure Yes No Yes No No No No Yes No No No Not sure No No Yes No No Yes No No Yes Yes Yes

Problem 11-3 Blair & Rosen, Inc. (B&R) is a brokerage firm that specializes in investment portfolios designed to meet the specific risk tolerances of its clients. A client who contacted B&R this past week has a maximum of $50,000 to invest. B&R's investment advisor decides to recommend a portfolio consisting of two investment funds: an Internet

Find the 95% confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers has a variance of 3.2. Assume the variable is normally distributed a. 5.382 < 2 < 26.576 b. 1.68 < 2 < 8.31 c. 2.319 < 2 < 5.155 d. 1.296 < 2 < 2.883

2: Tests of Significance Throughout this assignment you will review mock studies. You will needs to follow the directions outlined in the section using SPSS and decide whether there is significance between the variables. You will need to list the five steps of hypothesis testing (as covered in the lesson for Week 6) to see how every question

Jose needed a personal computer for school but her budget was tight so she decided on a used computer. After some searching, she was down to two possibilities. One she had found a national franchise computer store where she could purchase the PC for $800 with one-year guarantee. However, she was intrigued by a second possibility: a local charity

1. To perform a two-tailed chi-square test at the 1% level of significance about the population standard deviation using a small sample selected from a normally distributed population, we find thecritical valuesusing Select one: a. CHI-SQUARE sub 0.99 and CHI-SQUARE sub 0.01b. CHI-SQUARE sub 0.995 and CHI-SQUARE sub 0.005c. CHI-SQUARE sub 0.975

Rosen's Department Store had 430 big-screen TVs in stock at the end of the year. Inventory records show the following information: DATE QUANTITY COST TOTAL January 1 Beginning Inventory 350 $2,610 $ 913,500 July 8 Purchase 50 2,400 120,000 August 3 Purchase 150 2,880 432,000 October 15 Purchase 450 3,210 1,444,500 November 18 Purchase 50 3,300

21. A number of cars arriving per hour at Shreve Car Wash (SCW) during the past 200 hours of operations is observed to be the following frequency distribution. The total frequency = 200. X = Number of Cars Arriving Frequency 5 30 6 50 7 80 8 30 9 10 Compute the expected value (in 2 dec pl)of X. Select one: a. 7.60 b. 6.70 c. 13.40 d. 134.00 e. 3.35

How many ways can we seat n married couples around a circular table such that no husband wife pair sits next to each other? (Two arrangements are considered identical if one can be obtained from the other by a rotation around the table) Use the inclusion-exclusion principle.

According to a psychologist at the Medical College of Virginia, soccer players who head the ball 10 or more times a game are at risk for brain damage that could lower their intellectual abilities. In tests involving young male soccer players, those who typically headed the ball 10 or more times a game recorded a mean IQ score of 103, compared to a

MATH HELP NEEDED PLEASE HELP! 1) A person borrows $5000 for 6 months at a discount rate (simple interest) of 4% per year. (a) Determine the discount (D) - show work. (b) Determine the proceeds (P), the actual amount the borrower gets - show work. 2) If a $25,000 investment grows to $75,000 in 25 years, what is the interest rate (in percentage,

Given the function f(x) = -2ex , find f(x) if x = 3. Given the function f(x) = -3ex + 1 , find f(x) if x = 2. Calculate the square root of 25 Calculate the square root of 81 Calculate the square root of 144 Factor: 16x +28y Factor: 21x -42xy Factor: 10x + 25x^4 Factor: 32x^3y^4 - 48x^2y Factor: 36xy - 72ac Factor: 6a^2b^7-24a^2b^6 Factor: m(a+2) +

Hello, I'm taking Intro to Computer Systems at Champlain College (CMIT 135). I've seen the answer from one of the uploaded documents but I want to know which equation I would need to use to have gotten that answer because I'm unsure. The answer reads as: A standard computer DVD holds approximately 5 billion characters. Estimate how many linear

Goods and services of all kinds are advertised to potential customers to expand product usage and to make profits. Medications are advertised as well. If they were not, people would be unaware of the products available to them and sales may be so low that no money is made by the companies who have invested in the new medication. When reading or

A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 433 gram setting. It is believed that the machine is underfilling the bags. A 26 bag sample had a mean of 427 grams with a standard deviation of 15. Assume the population is normally distributed. A level of significance of 0.05 will be used.

assignment 2A from Athabasca page 1 Question 1.b.c.d. answers

\f

A population consists of the following five values: 1, 1, 3, 4, 5. (a) List all samples of size 3, and compute the mean of each sample. (Round sample means to 2 decimal places.) Sample Values Sum Mean 1 (Click to select)1,1,51,1,31,1,41,4,51,3,43,4,51,3,5 2 (Click to select)1,3,51,4,51,1,41,1,31,1,53,4,51,3,4 3 (Click to

From a population with standard deviation 25, a sample of size 100 is drawn. The mean of the sample is 235. Construct a 90% confidence interval for the true mean of the population. An evaluator wishes to make a statement about the emotional maturity of the freshmen population, so she decides to sample the population and administer an emotional

I am in a debate. The topic--- statistical survey is just a tip of the iceberg in terms of understanding a social phenomena. Do you agree? I am on the disagree side. Can u please assist me with some information Thank you

A rectangular tank with a square base, an open top, and a volume of 32 ft 3 is to be constructed of sheet steel. Find the dimensions of the tank that has the minimum surface area. The dimensions of the tank with minimum surface area are ____?? ft.

title: "Homework 5" output: pdf_document --\\begin{center} \\textit{Due May 13, 2016 before 11:59 PM via upload to CCLE} \\end{center} \\section{Swirl Package} \\textbf{Problem 1.} - Start swirl and complete the lessons using: **swirl()** - Do the following lessons: a) Do **10: simulation** lesson. What command was used to create my_pois variable?

Shamrock oil owns a parcel of land that has the potential to be an underground oil field. It will cost $500,000 to drill for oil. If oil does exist on the land, shamrock will realize a payoff of $4,000,000 (not including drill cost). With current information, shamrock estimates that there is a 0.2 probability that oil is present on the site.

1.A survey conducted last year by my students in Business Studies found out that the average net income for Business graduates is $74,914. One of my current students queried the results and decided to repeat the research by taking a random sample of 112 Business Graduates to determine whether the net income figure is different. (i)Establish the

Multiply then simplify answers. ( 9t^2 - t - 2 ) ( 6t^2 + 9t - 1 )

\f

A company that makes cartons finds that the probability of producing a carton with a puncture is 0.03, the probability that a carton has a smashed corner is , 0.09 and the probability that a carton has a puncture and has a smashed corner is 0.003 Answer parts (a) and (b) below. a) Are the events"selecting a carton with apuncture" and"selecting a

12)Evaluate the determinant of the given matrix. -4 1 0 2 8 -8 2 -2

Showing 300 - 400 of 1499
  • 4 / 15