A random sample of 80 eighth grade students' scores on a national mathematics assessment test has a mean score of 286. This test result prompts a state schooladministrator to declare that the mean score for the state's eighth graders on this exam is more than 280. Assume that the population standard deviation is 30. Ata=0.11, is there enough evidence to support the administrator's claim? Complete parts (a) through (e).GILEz (a) Write the claim mathematically and identify Ho and H. Choose the correct answer below.OA. Ho: 280OB. Ho: 280 (claim)H₂H>280OC. Ho: HS280 (claim)H₂H>280Ha 280 (claim)VE. Ho: 5280QF. Ho <280OD. Ho: 2280 (claim)H₂H<280H>280 (claim)H:2280 (claim)21(b) Find the standardized test statistic z, and its corresponding area.NSZ= (Round to two decimal places as needed.)MI(b) Find the standardized test statistic z, and its corresponding area.The standardized test statistic is

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Answered: A random sample of 80 eighth grade…

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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Assume that adults have IQ scores that are normally distributed with a mean of 103.2 and a standard deviation 19.1. Find the first quartile Q1, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is nothing. (Type an integer or decimal rounded to one decimal place as needed.)
Assume that adults have IQ scores that normally distributed with a mean of 99.2 and a standard deviation of 24.2. Find the first quartile Q1. Which is the IQ score separating the bottom 25% from the top 75%. ( hint . Draw a graph ). The first quartile is ____ ( type an integer or decimal rounded to one decimal place as needed .)
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A random sample of 76 eighth grade students' scores on a national mathematics assessment test has a mean score of 283. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 40. At x = 0.07, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and H₂. Choose the correct answer below. a A. Ho: μ≤275 (claim) Ha:μ>275 D. Ho: μ=275 (claim) Ha:μ>275 (b) Find the standardized test statistic z. Z= (Round to two decimal places as needed.) B. Ho: μ = 275 H₂:μ>275 (claim) E. Ho:μ≤275 Ha:μ> 275 (claim) C. Ho: μ<275 H₂:μ ≥275 (claim) F. Ho:μ ≥275 (claim) Ha: μ<275
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Assume that adults have IQ scores that are normally distributed with a mean of 100.9 and a standard deviation 24.4. Find the first quartile Q₁, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)
A random sample of 80 eighth grade students' scores on a national mathematics assessment test has a mean score of 289. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 285. Assume that the population standard deviation is 37. At a = 0.05, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and Ha. Choose the correct answer below. O A. Ho: H=285 Ha: u> 285 (claim) O B. Ho: µ = 285 (claim) O C. H : μ 285 Ha: µ2 285 (claim) O D. Ho: u2285 (claim) Ο Ε. Ho:μ 285 OF. Ho: µs285 (claim) H:p>285 Ha: u 285 (claim)
Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard deviation 16.7. Find the first quartile Q₁, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)
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A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a mean score of 267. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 30. At x = 0.08, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and H₂. Choose the correct answer below. A. Ho: μ = 260 B. Ho: μ≤260 (claim) C. Ho: μ≤260 Ha: μ> 260 (claim) Ha:μ> 260 Ha: μ> 260 (claim) O E. Ho: μ 260 Ha: μ ≥260 (claim)

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