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Mathematics Questions and Answers March 09, 2023

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I need help with the following problem: There were about 1,000 students with scores in the range 450-650 on the Verbal SAT. About ____ of them had scores in the range 500 to 600. Fill in the blank.

Find the indicated probability using the standard normal distribution. P(-0.36

A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately 1 2 mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers. Male Driver Female Driver 1.4 -0.1 1.2

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There is a 14 percent chance that a Noodles & Company customer will order bread with the meal. Use Excel to find the probability that in a sample of 10 customers (a) more than five will order bread.(Round your answer to 5 decimal places.) P(X> 5) (b) no more than two will.(Round your answer to 4 decimal places.) P(X 2) (c) none of the 10 will

1. True or False. Justify for full credit. (a) The normal distribution curve is always symmetric to 0. (d) In a hypothesis testing, if the p-value is less than the significance level , we do not have sufficient evidence to reject the null hypothesis. Hints Quiz #5 1. True or False. Justify for full credit. (a) The normal distribution curve is

The following shows the temperatures (high, low) and weather conditions in a given Sunday for some selected world cities. For the weather conditions, the following notations are used: c = clear; cl = cloudy; sh = showers; pc = partly cloudy. 1. 2. 3. 4. How many elements are in this data set? How many variables are in this data set? How many

Suppose that we are interested in buying ball bearings from a certain manufacturer. We require very precisely manufactured ball bearings, and so we decide to investigate this manufacturer's output. In a random sample of 200 of the ball bearings, 50 of them contain manufacturing defects that make them useless to us. What is a 93% confidence

Question:Measuring and monitoring in the control phase helps to sustain the gains made by the implementation of the improvements. Calculating capability indices supports the quality of the results. Given the following data, calculate Cp and Cpk. USL = 150 LSL = 50 s = 5 x-bar = 75 Please show the work on how this answer is obtained for a better

Prove that 81 | (10n+1 9n 10) for every nonnegative integer n

Answer the following questions showing all work. For questions that require Minitab Express, include the appropriate output (copy+paste) along with an explanation. Both output and explanation are needed to receive full credit. 1. In Spring 2016 a sample of 523 Penn State World Campus STAT200 students were asked how many languages they can speak.

URL http://highered.mheducation.com/olc2/dl/540865/Sample_Project_Report.pdf NORTHWESTERN OKLAHOMA STATE UNIVERSITY -DIVISION OF BUSINESS COURSE: GBUS 3753 Business Research SUMMER PROFESSOR: Sneary, K 2016 SECTION: Online The courses listed below are required prerequisites for this course. ALL PREREQUISITES MUST BE COMPLETED WITH A GRADE OF \"C\"

Consider the problem of sending a binary message, 0 or 1, through asignal channel consisting of several stages, where transmissionthrough each stage is subject to a fixed probability of erroralpha. Suppose that X0=0 is the signal that is sent and let Xn bethe signal that is received at the nth state. Assume that {Xn} is aMarkov chain with

Confidence Interval based on a T-distribution You intend to estimate a population meanwith the following sample. 63.2 73 61.7 50.5 52.1 54.3 49.7 75.3 56.9 58.3 77.5 62 You believe the population is normally distributed. Find the 99.9% confidence interval. Enter your answer as anopen-interval(i.e., parentheses) accurate to two decimal places.

a hand of five cards is randomly chosen, without replacement, from a standard 52 card deck. What is the probability that the hand consist of two parts of the same kind(with each pair being of a different kind from the other pair) and one more card of a third kind?

A survey is conducted by the American Automobile Association to investigate the daily expense of a family of four while on vacation. Suppose that a sample of 64 families of four vacationing at Niagara Falls resulted in sample mean of $252.45 per day and a sample standard deviation of $74.50. a. Develop a 95% confidence interval estimate of the

Complete the statement below. A confidence interval for a population mean__________. Choose the correct answer below. A. A confidence interval for a population mean gives possible values the true population mean will be with a certain level of confidence. B. A confidence interval for a population mean gives possible values the true population mean

A wire lies along the piecewise linear curve extending from the point (4,4) to the point (10,7) to the point (10,10). If the density of the wire is given by (x,y)=2xy+3x, use a line integral to find the mass of the wire.

Question 2 (1 point) Assume that we conduct a survey of KSU and GA Tech business school alumni. In total, 230 alumni respond to our survey, 150 GA Tech graduates and 80 KSU graduates. From this survey we construct the following income data: GA Tech graduates (150 responders), average income 71,000, and the standard deviation is 12,000; KSU

Is it true that the length of a confidence interval can be determined if you know only the margin of error? Explain your answer.

A hypothesis testing was performedto decide if the sample data support the claim. Ho: support the claim. Ha: opposite to the claim. This is Left-Taled test with the significance level 10% (0.10). Calculated z-value for test statistics is z = - 0.45. Does the sample data support the claim? Based on this sample, should we reject or do not reject Ho?

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What is the probability that a randomly selected person has an IQ between 85 and 115?

Another sample of candies was opened and recorded. The sample size was 30. Below is the summary of the sample. Assume the standard deviation is known. red 3.16 1.61 color mean sd 1 green 2.63 1.42 total 9.1 2.54 90% CI for mean number of red candies z(a/2) = z(0.10/2) = Lower Upper 2 blue 3.32 1.42 1.6448536 mean - z(a/2)*(sd/sqrt(n)) 2.6764614

The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of12.6minutes and a standard deviation of3.9minutes. Letxbe the mean delivery time for a random sample of10orders at this restaurant. Calculate the mean and standard deviation ofx. Round your answers to two decimal places.

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how reliability assessment in a process industry can improve the cost effectiveness in the overall ?

if n = 20 and p = .70, then the standard deviation of the binomial distribution is?

Given the following sample observations, draw a scatter diagram on a separate piece of paper.(Round your answers to 3 decimal places.) X: -7 -17 13 1 16 Y: 59 243 157 1 342 The coefficient of correlation is. Does the relationship between the variables appear to be linear?(Click to select)YesNo Try squaring theX- variable and then determine the

A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service. The firm wants 85 percent confidence and an error of +- 5 percent (i.e. 0.05). What is the required sample size (to the next higher integer)?

Calculus I (Math-UA-121.036) Fall 2016-HW 7 Section 3.3 1. Find the derivative of the following functions using logarithmic differentiation. q x(x+2) (a) f (x) = (2x+1)(3x+2) (b) f (x) = (2x + 1)(4x2 ) x 9 (c) f (x) = xx x 2. According to a simplified economic model, the purchasing power of 1 dollar in the year 2000 + t is equal to P (t) =

Six different colored dice are rolled. Of interest is the number of dice that show a "3." Find the probability that all six dice show a "3." (Round your answer to five decimal places.)

The purpose of a null hypothesis is to : a) give a point of comparison for the research results b) express the researchers true expectations c) it has no purpose d) express what happens if nothing happens

A study by Jackman-Cram, Dobson, and Martin (2006) investigated the communication behavior of married couples during problem-solving discussions. The researchers first classified participant couples according to their level of marital distress (distressed, nondistressed). They then classified the couples on the basis of whether one of the spouses

What is was the average speed in km/ h of a boat that moves 15.0 km across a lake in 45 min

In class of 25 students 3 students failed. What is the probability that student from this class will pass (NOT fail)? 0.45 0.60 0.72 0.88

As part of an evaluation program, a sporting goods retailer wanted to compare the downhill coasting speeds of 4 brands of bicycles. She took 3 of each brand and determined their maximum downhill speeds. The results are presented in miles per hour in the table below. Trial Barth Tornado Reiser Shaw 1 43 37 41 43 2 46 38 45 45 3 43 39 42 46 The null

The percentage of executives in a certain industry receiving cash signing bonuses is increasing. The percentage is given by the function B(t) = 4.899(1.321) t , where t is the number of years since 1996. Find the percentage of executives receiving signing bonuses in 2002 and in 2003. In 2002, ________________% of executives received signing

X has the following probability distribution P(X): X 1 2 3 4 P (X) .1 .5 .2 .2 Compute the expected value of X.

If I have a likelihood function based on the exponential distribution with parameter, why would a normal prior with mean prior andvery large variance be inappropriate for?

The probability that a visit to a primary care physician office results in neither lab work nor referral to a specialist is 35%. Of those coming to the office, 30% are referred to specialist (event A) and 40% require lab work (event B). Determine the probability that a visit to the office results in both lab work and a referral and then determine

The two intervals (114.3,115.1) and (114.0,115.4) are confidence intervals (computed using the same sample data) for= true average resonance frequency(in hertz) for all tennis rackets of a certain type. (a) What is the value of the sample mean resonance frequency? (Hint: Where is the confidence interval centered?) ? Hz

Fully define construct-irrelevant variance. Be sure to include the main type of validity it is related to as well its effects on test scores. Incorporate Messick (1995) from your readings into your answer.

The presence of student-owned information and communication technologies (smartphones, laptops, tablets, etc.) in today's college classroom creates learning problems when students distract themselves during lectures by texting and using social media. Research on multitasking presents clear evidence that human information processing is insufficient

In October 2012, Apple introduced a much smaller variant of Apple iPad, known as the Ipad mini. weighing less than 11 ounces, it is 50% lighter than the standard iPad. Battery tests for the iPad mini showed a mean life of 10.25 hours. (The Wall street journal, Oct. 31, 2012) Assume the battery life of the Ipad mini is uniformly distributed between

BUAD 2060-DL, Assignment 2 Novelty Toys, Inc. sells a variety of new and innovative children's toys. Management learned that the preholiday season is the best time to introduce a new toy, because many families use this time to look for new ideas for December holiday gifts. When Novelty discovers a new toy with good market potential, it choses an

Suppose the distribution of weights for adult American alligators has an unknown shape, but a mean of 790 pounds and standard deviation of 75 pounds. A random sample of 50 alligators is taken from the population of all American alligators. A.Describe the sampling distribution for the sample mean. B. What is the probability that the sample mean

Calculus Writing Assignment: Differentiability Each question is worth 5 points. Total: 50 Points Answer each of the following questions. Make sure to show your work. 1) If possible, give an example of where a function is differentiable at a point but not continuous at that point. 2) If possible, give an example of where a function is continuous at

Identify a research question as a consultant in the Industrial Organizational field working in Human Resourcesthat can be addressed by a one-way ANOVA. Indicate why a one-way ANOVA would be the appropriate analysis for this research question. Describe the variables and their scale of measurement. Discuss the expected outcome.

Assume that the hourly cost to operate a commercial airplane follows the normal distribution with a mean of $3,236 per hour and a standard deviation of $432. What is the operating cost for the lowest 5% of the airplanes?(Roundzvalue to 2 decimal places and round final answer to nearest whole dollar.)

Question: #1 List the coordinates of where extrema or points of inflection occur. State where the function is increasing or decreasing as well as where it is concave up or concave down. What are the coordinates of the relative extrema? Find the inflection points. Determine the candidates for inflection points (solve for x). Sketch the graph using

Which probability distribution applies to the following question (I do NOT want you to answer it, just tell which probability distribution applies here and why). Given: The probability that a student passes the written test for a private pilot's license is 0.75. Question: What is the probability that a student will fail on the first attempt and

Wk 7 Question 2 A social scientist wishes to conduct a survey. She plans to ask a yes/no question to a random sample from the U.S. adult population. One proposal is to select 100 people; another proposal is to select 900 people. Which of the following is true regarding the sample proportion p-hat, of "yes" responses? A The sample proportion from

Citizen registration and voting varies by age and gender. The following data is based on registration and voting results from the Current Population Survey following the 2012 election. A survey was conducted of adults eligible to vote. The respondents were asked in they registered to vote. The data below are based on a total sample of 760. We will

Scenario: Statistical significance is found in a study, but the effect in reality is very small (i.e., there was a very minor difference in attitude between men and women). Were the results meaningful? An independent samples t test was conducted to determine whether differences exist between men and women on cultural competency scores. The samples

Which one of the followings do we use in making a decision for the P-value method? Comparing the P-value against the significant level Comparing the P-value against the critical value Comparing the Standardized z-test against the critical value Comparing the critical value against the significant level

How do you make a decision for a claim that the mean value of males weight is 150 pounds for a significant level of 0.04 using a rejection region method? A sample with a mean of 145 pounds, size of 36, and a standard deviation of 16 pounds is selected. Is -1.875 > 2.054? Is standardized z-test critical value or standardized z-test > critical

Module 4 Assignment Chapter 9 1. (Hypothetical) The General Social Survey measures the amount of hours that individuals spend on the internet each week. Males use the Internet 10.17 hours per week. (standard deviation 11.71 N = 118), while women use the Internet 9.08 hours per week (standard deviation 12.26; N = 157). a) Test the research

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STAT 121: Wri+ng Assignment 1 Condence Intervals (12 points) Direc+ons: Read the following ar0cle and answer each ques0on completely but concisely. Be sure to save a copy of your work, and see the syllabus for submission details. (The spacing between the ques0ons is not necessarily an indica0on of the expected response length.) Journal March 26,

The times per week a student uses a lab computer are normally distributed, with a mean of 6.1hours and a standard deviation of 1.5hours. A student is randomly selected. Find the following probabilities. (a) Find the probability that the student uses a lab computer less than 4hours per week. (b) Find the probability that the student uses a lab

Many regions along the coast in North and South Carolina and Georgia have experienced rapid population growth over the last 10 years. It is expected that the growth will continue over the next 10 years. This has motivated many of the large grocery store chains to build new stores in the region. The Kelleys Super Grocery Stores Inc. chain is no

The professor in a certain course requires the students to turn in two term papers during the semester. The length of the first paper is supposed to be about 15 pages, but the professor further explains that what he means by that is that it must be somewhere between 13 and 17 pages. (Since we will measure the length of papers only to the nearest

i can't seem to figure this out, can someone show me step by step on how to get the answer. PLEASE! thank you 1.)Write the equation of the tangent line to the graph ofy= (9x 2 6x+2)(1 + 2x)atx= 1.Check the reasonableness of your answer by graphing both the function and the tangent line. 2.) Write the equation of the tangent line to the graph of y

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Biostatistics - Lehman College Homework I. The administrator of a physical therapy facility has found that postoperative performance scores on a knee flexibility test have tended to follow a normal distribution with a standard deviation of 4. For a simple random sample of ten patients who have recently had knee surgery, the scores are as follows:

Product Age Gender Education Marital Status Usage Fitness TM195 18 Male 14 Single 3 4 TM195 19 Male 15 Single 2 3 TM195 19 Female 14 Partnered 4 3 TM195 19 Male 12 Single 3 3 TM195 20 Male 13 Partnered 4 2 TM195 20 Female 14 Partnered 3 3 TM195 21 Female 14 Partnered 3 3 TM195 21 Male 13 Single 3 3 TM195 21 Male 15 Single 5 4 TM195 21 Female 15

Player The net revenue for a certain car company (in billions of dollars) between the years 2005and 2012 is approximated by R(x) = -.694x 3 -.694x 3 +15.6x 2 -153.3x +494.4, where x =5 corresponds to the year 2005 Complete part (a) (a) What is the revenue in 2007? $(billion)

Thequality-control manager at a compact fluorescent light bulb (CFL) factory needsto determine whether the mean life of a large shipment of CFLs is equal to7,500 hours. The population standard deviation is 1,000 hours. A random sampleof 64 CFLs indicate a sample life of 7,250. a. State the Null andAlternative Hypothesis. b. Draw the normal

astman Publishing Company is considering publishing an electronic textbook on spreadsheet applications for business. The fixed cost of manuscript preparation, textbook design, and website construction is estimated to be $150,000. Variable processing costs are estimated to be $7 per book. The publisher plans to sell access to the book for $49 each.

Steele Breakfast Foods Inc. produces a popular brand of raisin bran cereal. The package indicates it contains 25.0 ounces of cereal. To ensure the product quality, the Steele inspection department makes hourly checks on the production process. As a part of the hourly check, 4 boxes are selected and their contents weighed. The results are reported

1. The chartered financial analyst (CFA) designation is fast becoming a requirement for serious investment professionals. Although it requires a successful completion of three levels of grueling exams, it also entails promising careers with lucrative salaries. A student of financial is curious about the average salary of CFA charterholders in

Asportspsychologistreadthatlackofsleepimpairsreactiontimeandwantstoreplicatethestudy.Shecollecteddataontwosamples.Group1waskeptawakefor24hours.Group2wasallowedtosleepcomfortablyfor8hours.Thefollowingmorning,bothgroupsweregivenatestofreactiontimewiththefollowingresultsshownbelow.Doessleepdeprivationhaveanadverseeffectonreactiontime?Use=0.05. Please

Q: Sketch the graph of the following function. List the coordinates of where extrema or points of inflection occur. State where the function is increasing or decreasing as well as where it is concave up or concave down. What are the coordinates of the relativeextrema? Find the inflection points. Determine the candidates for inflection points(solve

2. True or False Temperature remains constant during phase change.

Question 1. A simple linear regression model for marks (Yi) and the hours of study (Xi) is as follows: Yi =0 +1 Xi +ei where 0 and 1 are unknown parameters, and ei is the disturbance term. The regression results are: Regression Statistics___________ Coefficient Standard error t Stat p-value Intercept 50 2.00 A 0.01 Study hours B 0.50 4 0.05 R

Football Baseball Basketball Soccer Male 8 7 20 15 Female 5 3 12 10 Based on the given data calculate the probability that randomly selected person likes soccer. 15/80= 3/16 25/80= 5/16 50/80= 5/8 30/80=3/8

A poll is given, showing 35% are in favor of a new building project. If 5 people are chosen at random, what is the probability that exactly 3 of them favor the new building project?

A payment of $800 on an invoice for $1887 reduced the balance owed to $1070.67. What cash discount was allowed on the $800 payment?

How does one solve a system of linear equations? Can you please explain it step by step

A die is rolled, find the probability that an even number is obtained.

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uiz 2 Each question is worth 1 point. Don't leave anything blank. I can always find a way to give you some credit if you've made an attempt. Be sure to post any questions you have after the answers open. The work you turn in by 11:59 P.M. on July 24th must be your own. 1. You draw two cards from a deck, what is the probability that: a. both of

Submit the Following (using this website: http://www.gpower.hhu.de/) 2. Calculate the sample size needed given these factors: ANOVA (fixed effects, omnibus, one-way) small effect size alpha =.05 beta = .2 3 groups Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample

Find the revenue function given the marginal revenue function R'(x)=600-5e .0002x .Recall that if no items are sold, the revenue is 0.

Let y represent the total cost of publishing a book (in dollars). Let x represent the number of copies of the book printed. Suppose that x and y are related by the equation 1200+25x=y. Answer the questions below. Note that a change can be an increase or a decrease. For an increase, use a positive number. For a decrease, use a negative number. A.

Competitive Bidding The Illinois State Police Department is interested in tires for its squad cars. These tires must satisfy the specification that the mean life of the tire must be greater than 80,000 miles and the standard deviation must be less than 500 miles. Five different tire makers sent the automaker tires to be tested. (The identities of

Question #1: Poker is back. It is so popular that the internet is loaded with on-line poker sites. Johnny C. is a poker enthusiast who believes that a certain on-line site is manipulating the probabilities to encourage winning. He has recorded the results of 3 months of playing with the accepted probabilities for each hand, n = 2,996. Hand 1 pair

The annual rates of growth of output of a factory in 5 years are 5.0, 7.5, 2.5, 5.0, and 10.0 respectively. What is the compound rate of growth of output per annum for the period?

The number of requests for assistance received by a towing service is a Poisson process with average of 4 requests per hour*. a) Compute the probability that exactly ten requests are received during a particular 2 hour period. b) if the operators of the towing service take a 30 min break for lunch, what is the probability that they do not miss any

First Barry Bobby Cory Dale Glenn John Kal Kurt Mike Mike Pete Rey Ruben Robby Will Wally Andres Al Andres Bob Billy Jo Curt Dan John Jose Jack Kevin Len Mike Mariano Ozzie Oddibe Steve Shawon Steve Vince Alvin Argenis Billy Chris Daryl Danny Eric Glenn Herm Jim Jeff John Jose Kirby Larry Mike Mike Mark Mickey Milt Rob Rick Scott Terry Andy Bill

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This group discussion will help prepare you for activity M1A2, in which you will write and submit an individual complete solution to a similar problem. Solve the following problem, and post your solutions to the discussion forum. Jill has a swimming pool in her backyard. It is shaped like a rectangle and measures approximately 16.3 feet wide and

A country has m+1 cities (m N), one of which is the capital. There is a direct railway connection between each city and the capital, but there are no tracks between any two non-capital cities. A traveler starts in the capital and takes a train to a randomly chosen noncapital city (all cities are equally likely to be chosen), spends a night there

. A dishonest shopkeeper mixes water in acid to earn a profit. He sells acid worth $5.4/litre at $4.2/litre. If he initially had 14 litres of acid then how many litres of water did he add to it?

Respond to this post and comment on the following: Do you think the variables are appropriately used? Why or why not? Does the addition of the control variables make sense to you? Why or why not? Doestheanalysisanswertheresearchquestion?Besureandprovideconstructiveandhelpfulcommentsforpossibleimprovement. If there was a significant effect,

Perform the indicated operation, if possible 9 +8 Solve for x + =

Week 5 Practice Worksheet PSY/315 Version 6 1 University of Phoenix Material Week 5 Practice Worksheet Chapter 13 1. Your research team has been tasked with finding the correlation of the following scenario: Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more

7.One conclusion you might reach (hint) after completing the readings for this assignment is that there are no bad designs, only bad design choices (and implementations). State a research question for which a single-group post-test only design can yield relatively unambiguous findings. (Could the research question be: The effect of after school

The following data represents the number of days absent per year in a population of six employees of a small company: 1 3 6 7 9 10 a. Assuming that you sample without replacement, select all possible samples of n = 2 and construct the sampling distribution of the mean. Compute the mean of all of the sample means and also compute the population

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