CELLULAR2022LQedmentum login - SearchX e Two-Way Frequency Tables: Prac XKODAK BLACK-TRUMP TIES (FU X +← → Chttps://f2.app.edmentum.com/assessments-delivery/ua/ce/launch/16659/45518967/aHR0cHM6Ly9mMiShcHAUZWRtZW50dW0uY29tL2xlYXJuZX...ATwo-Way Frequency Tables: PracticeSave and ExitQuestion 2 of 5Select the correct answer.The dance committee at a local high school polled students to determine what theme they would like to have for the school dance. Theresults of the poll are shown in the two-way frequency table below.Starry Night Beach Party Masquerade TotalGirls924856196Boys688848204Total160136104400Approximately what percentage of the total number of girls prefer the starry night theme?O 46.9%O73.9%O 34.7%O 57.5%Submit80°FClearWER || T ||1MPResettoLA▼

Given data is Starry Night Beach party Masquerade Total Girls 92 48 56 196 Boys 68 88 48…

Answered: The dance committee at a local high…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The company "TRAMAD" is conducting a study on the variation of the prices of its shares, listed on the Santiago Stock Exchange. For this purpose, it takes a sample of prices corresponding to the last 30 working days. The value indicated is the one that has been registered at the closing time of the operations: 450 540 280 440 350 720 400 190 410 700 600 500 250 780 290 580 320 220 320 660 300 360 320 605 180 300 210 520 290 420 a) Make a frequency table. b) TRAMAD estimates that your situation is not alarming if the percentage of days in which prices were less than or equal to $400 is less than 30%. What do you say Is this company's situation alarming or not? Explain. c) Calculate the mean and standard deviation. d) Calculate and interpret the quartile 1.
A company that supplies gasoline to a city has recorded the weeklyusage (tons/week) for the past 3 years. The file BA2854GasolineRecord.xlsxcontains this record.(a) Propose a method for predicting the demand for gasoline. Use thatmethod to forecast demand for next year (weeks 157 to 208).(b) Improve your prediction in part (a) by including a statement about demand variability. (Hint: Look at or the range of the data.) week demand (tons) 1 1174.5 2 1316.2 3 1197 4 1127.3 5 1193.1 6 1260.7 7 1378.2 8 1273.7 9 1366.4 10 1113 11 1177.7 12 1056 13 1291.2 14 1269.1 15 1289.6 16 1181 17 1249 18 1212 19 1286.2 20 1204.8 21 1266.2 22 1332.4 23 1236.3 24 1266.1 25 1415.3 26 1100.1 27 1208.1 28 1505.1 29 1282.7 30 1190.5 31 1152.8 32 1089.7 33 1404.7 34 1308.6 35 1255.4 36 1106.7 37 1484.6 38 1317.4 39 1294.7 40 1154 41 1449.9 42 1174.9 43 1466.9 44 1282.4 45 1228 46 1174 47 1196.2 48 1443.8 49…
Determine the mean waiting time W for an M/M/2 system when lambda = 2 and μ = 1.2. Compare this with the mean waiting time in an M/M/1 system whose arrival rate is lambda = 1 and service rate is μ = 1.2. Since the arrival rate per server is the same in both cases and service times don’t vary, should the wait times be the same in both cases?
Solve its from frequency distribution
A report about an isolated community claims there are more newborn females than males, although we assume equal frequencies for each. Records indicate 628 boys and 718 girls born in the past month. What are H0 and Ha? Compute χ2obt. What is χ2crit? What do you conclude about birthrates in this community?
Ali Baba's Car Wash Service Centre is open 6 days a week, but its busiest day is always on Sunday. From the previous data, Ali Baba estimates that dirty cars arrive at the rate of one every two minutes, One car at a time is cleaned in this example of a single-channel waiting line. Assuming Poisson arrivals and exponential service times, find the following: iii) Compute the average time that a car spends in the system.
In the manufacturing of a certain scientific instrument great importance is attached to the life of a particular critical component. This component is obtained in bulk from two sources, A and B, and in the course of inspection, the lives of 1000 of the components from each source are determined. The following frequency tables are obtained:- Source A Source A Source B Source B Life (hours) No of components Life(hours) No of Components 1000-1020 1020-1040 1040-1060 1060-1080 1080-1100 1100-1120 40 96 364 372 85 43 1030-1040 1040-1050 1050-1060 1060-1070 1070-1080 1080-1090 339 136 25 20 130 350 i. Find Median and two quartiles for each group. ii. Find mean and Standard deviation for each source and compare them. iii. Which source do you think providing better quality of components and why?
Southwestern Electronics has developed a new calculator that performs a series of functionsnot yet performed by any other calculator. The marketing department is planning todemonstrate this calculator to a group of potential customers, but it is worried about someinitial problems, which have resulted in 4 percent of the new calculators developingmathematical inconsistencies. The marketing VP is planning on randomly selecting a groupof calculators for this demonstration and is worried about the chances of selecting acalculator that could start malfunctioning. He believes that whether or not a calculatormalfunctions is a Bernoulli process, and he is convinced that the probability of a malfunctionis really about 0.04. Assuming that the VP selects exactly 50 calculators to use in thedemonstration, and using the Poisson distribution as an approximation of the binomial whatis the chance of getting at least two calculators malfunctioning?
Fluoride Exposure in Drinking WaterExercise 2.250 introduces a study showing thatfluoride exposure might have long-term negativeconsequences for the offspring of pregnant women.Part of the study examines the effect of adding flu-oride to tap water on mean fluoride concentrationin women. Summary statistics for fluoride concen-tration (measured in mg/L) for the two groups are given in Table 6.17. Find and interpret a 99% con-fidence interval for the mean increase in fluorideconcentration for those with fluoridated tap water. 1. find the t-score enter positive z-score 2. find the standard of error round 4 decimal places. 3 find the margin of error round 4 decimal places
The goal of a ________ is to explain the relationship between observed phenomena, without necessarily being directly testable. datum theory hypothesis quantitative study
The problem of traffic delay in a highway can be studied in the following way. Let us assume that the probability of no traffic delay in one period, given no traffic delay in previous period, is 0.85 and that the probability of finding a traffic delay in one period, given a delay in the previous period is 0.75. The period of time is 30 minutes. Define the approach that should be used to solve the problem and identify all your inputs of the model.
Some companies "grade on a bell curve" to compare the performance of their managers and professional workers. This forces the use of some low performance ratings so that not all workers are listed as "above average." Ford Motor Company's "performance management process" for this year assigned 10%10% A grades, 80%80% B grades, and 10%10% C grades to the company's managers. Suppose Ford's performance scores really are Normally distributed. This year, managers with scores less than 2525 received C grades and those with scores of at least 475475 received A grades. What is the mean of the scores? (Enter your answer as a whole number.) mean: What is the standard deviation of the scores? (Enter your answer rounded to one decimal place.) standard deviation:

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