Unit 3: Statistics Exam Review (optional not part of..Brittany VQuestion 9 of 29 (1 point) Question Attempt: 1 of 1Español1234= 56.79.1011The distribution of scores on a standardized aptitude test is approximately normal with a mean of 520 and astandard deviation of 105. What is the minimum score needed to be in the top 15% on this test? Carry yourintermediate computations to at least four decimal places, and round your answer to the nearest integer.

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Answered: Brittany Question 9 of 29 (1 point)…

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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Suppose you wish to determine if the mean IQ of students on a certain campus is different from the mean IQ in the general population, 100. To conduct this study, you obtain a simple random sample of 90 students on this campus, administer an IQ test, and record the results. The mean IQ of the sample of 90 students is found to be 106.5 with a standard deviation of 13.1. Complete parts (a) through (c) below. Question Help v Click the icon to view the t-distribution table. (a) Construct a hypothesis test Ho: H= Ho versus H,: µ#Ho for Ho = 102, 103, 104, 105, 106, 107, 108, 109, 110, and 111 at a = 0.05 level of significance. Determine the test statistics for Hn = 102, 103, 104, 105, and 106. Ho = 102 to =O Ho = 103 to =D to =D to =0 to =D0 %3D Ho = 104 Ho = 105 Ho = 106 %3D (Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. Question Viewer 6. parts 6 remaining Clear All Check Answer MacBook Air 888 F7 FS esc F3 F2 & #3 $4 dele 8 9 1 3…
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Determine the number of standard deviations from the mean (z-score). In the United States, the distribution of a male's height has a mean of 69 inches with a standard deviation of 3 inches. How many standard deviations from the mean is John Doe, who is 67 inches tall? Question 15 options: 0.67 standard deviations below the mean 0.33 standard deviations below the mean 2 standard deviations below the mean 1 standard deviation below the mean
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Scores on the Wechsler Adult Intelligence Scale for the 2020 to 3434 age group are approximately Normally distributed with a mean of 110 and a standard deviation of 15. How high must a person score to be in the top 5%5% of all scores? Enter your answer as a whole number.
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answer only c-e In the 1992 presidential election, Alaska's 40 election districts averaged 1939 votes per district for President Clinton. The standard deviation was 550. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(40, 550)c. Find the probability that a randomly selected district had fewer than 1961 votes for President Clinton. ___________d. Find the probability that a randomly selected district had between 1843 and 2007 votes for President Clinton. __________e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number. _________
I’ve already posted this one, but I’m posting it again, because I need to be shown what to input into my TI-84 Plus calculator to solve.
Use the table to answer the question. Note: Round z-scores to the nearest hundredth and then find the required A values using the table.A biologist found the wingspans of a group of monary butterflies to be normally distributed with a mean of 52.8 mm and a standard deviation of 2.5 mm. What percent of the butterflies had the following wingspans? (Round your answers to one decimal place.) (a) less than 48.7 mm %(b) between 50 and 55 mm %
Use the table to answer the question. Note: Round z-scores to the nearest hundredth and then find the required A values using the table.The cholesterol levels of a group of young women at a university are normally distributed, with a mean of 181 and a standard deviation of 38. What percent of the young women have the following cholesterol levels? (Round your answers to one decimal place.) (a) greater than 223 %(b) between 186 and 222 %
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