S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. february 2023
  6. 28

Mathematics Questions and Answers February 28, 2023

Expert-verified solutions to help you succeed

List the elements in the set. Let U= {q,r,s,t,u,v,w,z,y,z} A= {q,s,u,w,y} B= {q,s,y,z} C= {v,w,x,y,z}. B (A-C)

You are the manager of a restaurant that delivers pizza to college dorm rooms. You have just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 25 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 22.4 minutes and a sample standard

Name ______________________________ QUIZ #6 Probability distributions 1. You have past historical data that shows that in 2008, 60% of all credit card customers had to pay late fees. You take a random sample of 20 credit card holders. Sample size 20 P(Pay late fee) 60% a. What is the probability that exactly 1 in the random sample had to pay a

An exponential probability distribution has lambda equal to 18 customers per hour. Find the following probabilities. a) What is the probability that the next customer will arrive within the next minute? b)What is the probability that the next customer will arrive within the next 45seconds? c)What is the probability that the next customer will

\f

\f\f\f\f\f\f\f\f\f\f

caroline collected 3 /1/4 bags of bottles to take to the recycling center. 1/3 of the bags are glass bottles. 2/3 of the bags are plastic bottles. the recycling center only accepts plastic bottles how many bags will the recycling center accept

Sheet1 Car 1 2 3 4 5 6 7 8 9 10 Brand 1 0.387 0.232 0.264 0.334 0.231 0.348 0.326 0.258 0.246 0.278 Difference Brand 2 (Brand 1 - Brand 2) 0.255 0.132 0.296 -0.064 0.285 -0.021 0.347 -0.013 0.152 0.079 0.338 0.01 0.197 0.129 0.186 0.072 0.251 -0.005 0.131 0.147 Page 1

A researcher conducted an experiment on the effects of a new drug on depression. The researcher had a control group that received nothing, a placebo group, and an experimental group that received the drug. A depression on a 50-point scale was used (50 indicates that a person is very high on the depression variable). The ANOVA summary appears next,

Construct the confidence interval for the population mean = 0.98 0 . 9 8 , x overbar = 6 . 4 , s = 0.9 , and n = 4 0 A 9 8 % confidence interval for is? (Round to two decimal places as needed.)

Assume that a circular manhole cover is to be constructed with a diameter off 22in. Men have a shoulder breadths that are normally distributed with a mean of 18.2 in. and a standard deviation of 1.0. What percentage of men will fit into this manhole? If there is a group of 36 men who work in manholes, what is the probability that their mean

A certain brokerage house wants to estimate the mean daily return on a certain stock. A random sample ofdays yields the following return percentages:1.8,-1.09,-0.02,-2.6,0.56,0.24,0.43,0.46,-0.1,0.76,1.11,-0.34,-2.07,-2.01,-2.08 If we assume that the returns are normally distributed, find aconfidence interval for the mean daily return on this

The profit function for two products is: P=-3x 1 2 +42x 1 -3x 2 2 +48x 2 +700 where x_1 represents units of production of product 1, and x_2 represents units of production of product 2. Producing one unit of product 1 requires 4 labor-hours and producing one unit of product 2 requires 6 labor-hours. Currently, 24 labor-hours are available. The

Ten percent of the population is left-handed. A class of 5350 students is selected. Convert the binomial probability P(x22) to a normal probability by using the correction for continuity. P(x <21.5) P(x>22.5) P(x22.5) P(x21.5)

Assess your utility function in three different ways. a. Use the certainty-equivalent approach to assess your utility function for wealth over a range of 100 to $20,000. b. Use the probability-equivelent approach to assess U($1,500), U($5,600), U($9,050), and U($13,700). Are these assessments consistent with the assessments made in part a? c. Use

Refers to the table below. the relative frequency of students working 9 hours or less number of hours frequency 0-9 40 10-19 50 20-29 70 30-39 40

Month 1st Year 2nd Year 3rd Year January 242 263 282 February 235 238 255 March 232 247 265 April 178 193 205 May 184 193 210 June 140 149 160 July 145 157 166 August 152 161 174 September 110 122 126 October 130 130 148 November 152 167 173 December 206 230 235

Write the formula for the derivative of the function.f(x) =13x 4 +17x 3 +8

Good Day, A homework priority of Mine are the following questions can You support the solution process? Here goes: 1. Suppose 100 people respond to a consumer survey. Of these, 70 live in a city. Of these 70 city residents, 40 are over the age of 30 years. Determine the probability that a randomly selected individual who responded to the survey is

HOW DO I SET THIS PROBLEM UP IN EXCEL: The method that is implemented to get to the optimal solution is known as Linear Programming. This is done by study of analysis of the program and forms the result in terms of coefficient optimization. From the provided information of the County Credit Union (CCU) annual rates of returns on loans for home(H)

Purpose: The overall goal of the learning labs is for you to learn the basic techniques involved in working with data sets. These techniques include: basic summation principles graphing data analyzing data with statistical techniques you will learn in this course The goal for this learning lab is to teach you to: evaluate results from a two-way

Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between: Answer options: 400 and 600 300 and 700 200 and 800 350 and 650 250 and 750

Grading Rubric for Case Study Assignments Criteria Good 20 Fair 15 Unacceptable 0 Score Substance 25% of grade Answers are meaningful and reflect insight and careful analysis of the issues posed; contains rich and fully developed ideas which are extremely well written and presented. Answers are meaningful and reflect insight and analysis of the

\f

A student's marks in five tests are 36%, 78%, 67%, 88% and 98%. The weights for the five tests are 1, 2, 2, 3, 3 respectively. Find the weighted mean of the five tests.

Use the internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used, summarize your finding, and share it with us

A survey found thatwomen's heights are normally distributed with mean 62.36 in. and standard deviation 2.5 in. The survey also found thatmen's heights are normally distributed with a mean 67.3 in. and standard deviation 2.9 Complete parts a through c below. a . Most of the live characters at an amusement park have height requirements with a

\f

\f

What does a y intercept tell you about the relationship between two variables?

Imagine you are in a game show, wherethere are 4 prizes hidden on a game board with 16 spaces. One prize is worth $4000, another is worth $1500, and two are worth $1000. But, wait!!! You are also told that, in the rest of the spaces, there will be a bill of $50 that you have to pay to the host as a penalty for not making the "wise" choice. Choice

\f

The table below shows a distribution and the observed frequencies of the values of a variable from a simple random sample of a population. Perform a chi-square goodness-of-fit test, at the specified significance level, to decide whether the distribution of the variable differs from the given distribution. Distribution: 0.2 0.2 0.1 0.2 0.3 Observed

For U= {q,r,s,t,u,v,w,x,y,z} A= {q,s,u,w,y} B= {q,s,y,z} C= {v,w,x,y,z} identify the following ( the complement of A).

If the average daily balance is $4600.00 and the monthly interest is 3.2%, what is the finance charge for the month? If needed, round the answer to the nearest cent.

Consider the following data on the diameter of a rivet. Assume a normal population. 6.68 6.66 6.62 6.72 6.76 6.67 6.70 6.72 6.78 6.66 6.76 6.72 6.76 6.70 6.76 6.76 6.74 6.74 6.81 6.66 6.64 6.79 6.72 6.82 (a) [6 marks] Estimate the population variance 2. (b) [6 marks] Compute a 95 percent two-sided condence interval for 2.

Exercise # 1: Collect and Comment on the variability of three recent data sets describing similar processes (could be prices of three items over the last month, demographic information related to 3 countries over last year, etc.). Exercise # 2: Plot the probability mass function (PMF) and the cumulative distribution function (CDF) of 3 random

Define the term statistics and make sure you follow the steps .

A trucking company determined that the distance traveled per truck per year is normallydistributed, with a mean of 7070 thousand miles and a standard deviation of 1010 thousand miles. What proportion of trucks can be expected to travel between 58and 70thousand miles in ayear? What percentage of trucks can be expected to travel either less than 4 5

MGMT 490/590: Predictive Analytics Fall 2016 Instructor: Matthew A. Lanham Homework #3 [100 possible points - every question worth 5 points] Due: Thursday, October 27th, 2016 by Midnight Late submissions for any reason will be subject to a 15% late penalty per day past due. No Blackboard excuses. Submission instructions: Submissions should be

Use the given confidence interval limits to find the point estimate ^p and the margin of error E. (0.851,0.885) ^p=

Determine whether the underlined value is a parameter or a statistic.One of greatest baseball hitters of all time has a career batting average 0.366 Is the value a parameter or astatistic?

chapter 5 INTRODUCTION TO MATRIX ALGEBRA GOALS The purpose of this chapter is to introduce you to matrix algebra, which has many applications. You are already familiar with several algebras: elementary algebra, the algebra of logic, the algebra of sets. We hope that as you studied the algebra of logic and the algebra of sets, you compared them

We are interested in determining whether or not the variances of the sales at two music stores (A and B) are equal. A sample of 16 days of sales at store A has a sample standard deviation of 40 while a sample of 21 days of sales from store B has a sample standard deviation of 15. Refer to Exhibit 2. *The test statistic is: *If the level of

A merchant sold 100 bananas. Eighty of them were sold at a profit of 30% while the rest were sold at a loss 40%. What is the percentage gain or loss on the business? can u explain it still dont know about profit and loss and formula to this thank you

Cake A takes the decorator 9 hours, the baker 6 hours, and the design consultant 1 hour to complete. Cake B takes the decorator 10 hours, the baker 4 hours, and the design consultant 2 hours. CakeCtakesthedecorator12hours,thebaker4hour,andthedesignconsultant1hour. Without hiring additional employees, there are 398 decorator hours available, 164

Find the area between y=6cos x and the x-axis for -pi/2

1. Let X uniform(0, ) and consider testing H0: = 1 vs. H1: > 1. We take one observation, X, from this distribution and reject H0 if X > 0.9. (a) Find , the type I error probability. (b) Suppose that = 1.1. Find , the type II error probability. 2.LetX1,...,Xn N(, 2 =4). To test H0: =10 vs H0: >10 we take a random sample of size n = 16 and reject

The average greyhound can reach a top speed of 18.6 meters per second. A particular greyhound breeder claims her dogs are fster than the average greyhound. A sample of 45 of her dogs ran, on average, 19.0 meters per second with a population standard deviation of 1.4 meters per second. With a=0.05, is her claim correct? A) Yes, because the test

\f\f

As you search for the best focus and scope for an essay, you zoom in and out of an imaginary map of a topic. Choose a general topic and describe the "map" as it would look from a zoomed out and a zoomed in perspective. Comment on other students' maps.

5.10 Work hours and education, Part II. The General Social Survey described in Exercise 5.8 included random samples from two groups: US residents with a college degree and US residents without a college degree. For the 505 sampled US residents with a college degree, the average number of hours worked each week was 41.8 hours with a standard

Park University SO307, Statistics For Social Science Please answer the following discussion question in approx. 100 words "The normal weather data from the Mount Washington Observatory are broken down by months. Why might you not want to average across all months in a year? How else could you summarize the year?"

\f\f

z = 1.8 for H a : > claimed value. What is the P-value for the test? A. 0.9641 B. 3.59 C. 96.41 D. 0.0359

One hundred people were asked, Do you favor the death penalty? Of the 33 that answered yes to the question, 14 were male. Of the 67 that answered no to the question, six were male. If one person is selected at random, what is the probability that this person answered yes or was a male? A) 0.39 B) 0.53 C) 0.67 D) 0.13

What is the mean of X, the number of people suffering from PTSD in a sample of 200 veterans?

5 percent level of significance #4. Lady GaGa Doll. Holiday Toys distributes its product, a Lady GaGa doll, through 1000 retail outlets. The marketing directorexpects an average of 40 dolls to be ordered by each retail outlet. Before production starts, the company decides tosurvey 25 retailers and test the marketing directors prediction. The

An employer interviews 7 people for 4 management positions in a company, and of the people are men. If all 7 are qualified, in how many ways can the employer fill the management positions if exactly 2 are men?

A researcher wants to estimate the proportion of people in Los Angeles whoare interested in buying an electric car. She wants to generate a 95% CI for this proportion such that the resulting interval has a width that is no more than 4%. How largea sample size should she take for this?

hello, can you please answer this question from the choices below In a simple linear regression model, if the plots on a scatter diagram lie on a straight line, what is the standard error of the estimate? -1 0 +1 Infinity

A 99% confidence interval (in inches) for the mean height of a population is This result is based on a sample of size 144. If the confidence interval is obtained from the same sample data, what is the degree of confidence? (Hint: you will first need to find the sample mean and sample standard deviation).

Decide whether the normal sampling distribution can be used. If it can beused, test the claim about the population proportion p at the given level of significance using the given sample statistics. Claim: p0.24;=0.01; Samplestatistics:^p with=0.21, n=100 Can the normal sampling distribution beused? State the null and alternative hypotheses

Rework problem 31 in section 4.1 of your text, involving the selection of two numbers. Assume that you select two 2-digit numbers at random from the set of consecutive integers from 00 through 99. The selections are made with replacement and are independent of one another. If the two numbers are the same, you make $750. If they are different, you

\f

\f

The following results were gathered from a survey where three toothpaste brands were tested by three groups. (For example, when 50 people tried Brand A toothpaste for a year, they got zero to one new cavities.) Brand A Brand B Brand C # of New Cavitties 0-1 3-Feb 4 or more 50 22 41 29 39 38 Determine if there is a significant difference in the

smoke yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes no no no no no no no no no no no no no no no no disease yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes

Consider the function f : [, ] R given by f(x) = (e^x)*sin x (a) Calculate local maxima/minima and points of inflection of f(x). (b) Draw the graph of y = f(x) indicating and explaining the main features.

1) If X is normally distributed with a mean of 30 and a standard deviation of 10, find P(30 X 47). a) 0.455 b) 0.855 c) 0.755 d) 0.655 e) 0.955 f) None of the above 2) Find a value of c so that P(Z c) = 0.62. a) 1.31 b) 0.31 c) 0.81 d) -0.31 e) 0.69 f) None of the above

Plan to Remain YES NO Total Responses 274 76 350 Percentage 0.78 0.22 100% Total 76 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N 274 Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Hypothesis Test: Independent Groups (t-Test, pooled variance)

Find the indicated probabilities using the geometricdistribution, the Poissondistribution, or the binomial distribution. Then determine if the events are unusual. Ifconvenient, use the appropriate probability table or technology to find the probabilities. Assume the probability that you will make a sale on any given telephone call is 0.12. Find

solid sphere of radius 20cm weighs 2kg.What is the weight in kg of a solid sphere of radius 30cm of the same material?

Discount Age Income Sex 998 27 47645 1 1422 41 32253 1 2520 21 28650 1 1649 46 29190 2 1354 27 37997 1 1525 43 25400 2 1400 55 30282 2 676 34 45671 2 919 39 46477 2 1431 19 27826 1 1838 46 31731 1 1376 34 20293 1 950 35 32655 2 1472 39 35605 1 2147 19 25801 1 1538 29 20930 1 988 43 49336 2 1164 35 39360 1 131 38 40623 2 564 40 47474 2 1827 52

The stem-and-leaf display below gives the fuel efficiencies (in miles per gallon) for a sample ofnew cars. Use the display to answer the following questions. Fuel efficiency (miles per gallon) 1|4 8 2|3 99 3|3 334 7 7 8 4|4 589 5|1 489 Key:1|4means a fuel efficiency ofmiles per gallon. (a) What is the highest fuel efficiency in the sample overall?

A sample of size 16 was selected from a normal population and used to test the null hypothesis that the population mean was equal to 50 vs. the alternative hypothesis that the population mean was less than 50. The sample produced a mean of 48with a standard deviation of 8. The test statistic is __________ .

\f

6 questions in math statistics. Must show all work for each. 1.Political polls typically sample randomly from the U.S population to investigate the percentage of voters who favor some candidate or issue. The number of people polled is usually on the order of 1000. Suppose that one such poll asks voters how they feel about the Presidents handling

33% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two (b) more than two and(c)

The table below shows the results of a survey that asked 2857 people whether they are involved in any type of charity work. A person is selected at random from the sample Frequently Occasionally Not at all Total Male 226 452797 1475 Female 206430 746 1382 Total 432 8821543 2857 a) find the probability that the person is frequently or occasionally

A farmer wants to build a fence along a river. He has 500 feet of fencing and wants to enclose a rectangular pen on three sides (with the river providing the fourth side). If x is the length of the side perpendicular to the river, determine the area of the pen as a function of x. What is the domain of this function?

GSS2012* How does the amount of education of one's parents (PAEDUC, MAEDUC) affect your education (EDUC)? . Calculate the correlation between the father's and the mother's years of education. Is there any sign of multicollinearity? Explain

WQ-7 Page: 1 of 1 BBA-439-01 Fall 2015 Assigned: 11-23-2015 Due (11:59pm): 11-29-2015 Student Name: email ID: 1 Bags of a certain brand of tortilla chips claim to have a net weight of 14 ounces. The net weights actually vary slightly from bag to bag and are normally distributed with mean . A representative of a consumer advocacy group wishes to

\f

\f\f

ONEWAY alcohol BY rating /STATISTICS DESCRIPTIVES HOMOGENEITY /PLOT MEANS /MISSING ANALYSIS /POSTHOC=TUKEY ALPHA(0.05). Oneway Notes Output Created 07-JUN-2013 12:39:57 Comments C:\\Users\\donn\\Documents\\GCU Lead fac\\Project with Judy for modifying Data PSY845 to introduce SPSS\\drinks database -revised for course applications DH.sav Input

1) A student organization at a university is interested in estimating the proportion of students in favor of showing movies biweekly instead of monthly. A SRS of 423 students revealed that 180 are in favor of showing movies biweekly. State the point estimate. (Round to two decimal places.) 2) A student organization at a university is interested in

One study, based on responses from 1,012 randomly selected teenagers, concluded that39% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of all teenagers in the population feel that grades are their greatest source of pressure. Formulate the null and alternative

For each pair of functionsfandgbelow, findf(g(x))andg(f(x)). Then, determine whetherfandgare inverses of each other.Simplify your answers as much as possible. (Assume that your expressions are defined for allxin the domain of the composition. You donothave to indicate the domain.) (a) f(x)=x+4 g(x)=x-4 f(g(x))= g(f(x))= are they inverses of each

Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin oferror:twopercentagepoints; confidence level 90%;from a priorstudy,^p is estimated by the decimal equivalent of 34% n=

\f\f

1 Part a Max Profit Grader X1 Sofa X2 Table X3 Chair Grader Dec Vars Part b Profit Coefficients Part c Constraint Coefficients Wood Upholstery Labor Warehouse Capacity Solver Solution X1 Sofa X2 Table X3 Chair X1 Sofa Part d Constraint X2 Table X3 Chair Value Grader Grader Grader Part e Amount Used Grader Part f Part g Slack or Type Surplus

Find the area enclosed by the curve r=2-2cos( ) Please show all of your work! Thanks!

1. (65 pts) The following data are the rates of oxygen consumption of birds, measured at differentenvironmental temperatures:T (C) -18 -15 -10 5 0 5 10 19 O2 consumption(ml/g/hr) 5.2 4.7 4.5 3.6 3.4 3.1 2.7 1.8 a) Calculate the intercept, a, and slope, b, for the regression of oxygen consumption rate ontemperature. b) Test the null hypothesis H0:

\f

3. Many animals, including humans, tend to avoid direct eye contact and even patterns that look like eyes. Some insects, including moths, have evolved eye-spot patterns on their wings to help ward off predators. Scaife (1976) reports a study examining how eye-spot patterns affect the behavior of birds. In the study, the birds were tested in a box

Age Gender OwnHome Married Location Salary Children Catalogs History Young Female Rent Single Close $16,400 1 12 1 Middle Female Own Married Far $108,100 3 18 3 Middle Male Own Married Close $97,300 1 12 NA Old Male Own Married Close $26,800 0 12 1 Young Male Rent Single Close $11,200 0 6 NA Middle Female Rent Single Close $42,800 0 12 2 Middle

the question is La Sanda bought 20 shares of stock for $175. SHe sold the tock for a total profit of $25. What was the selling price of each share of stock?

if in the Ring x 2 =x, the prove that each element is its own additive inverse. also, addition and subtraction are same.

Kevin and Randy Muise have a jar containing 56 coins, all of which are either quarters or nickels. The total value of the coins in the jar is $ 11.60. How many of each type of coin do they have?

Showing 900 - 1000 of 1523
  • 10 / 16