Illustration 19.34. A persón buys 100 electric tubes each of twowell-known makes, taken at random from the stocks for testing pur-pose. He finds that make A has a mean life of 1300 hrs with SD=82hrs, and make B has a mean life of 1248 hrs with SD=93 hrs. Dis-cuss the significance of these results.

Answered: Image /qna-images/answer/df7c2d99-dd98-4d8d-9159-ba108517a59e.jpg

Answered: Illustration 19.34. A persòn buys 100…

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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I need help on this question below The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test had a mean of 35 and a standard deviation of 9. High School GPAs had a mean of 2.9 and a standard deviation of 0.2.What high school GPA do you need to equal a score of 56 on the Accuplacer test?Give answer to two decimal places.
Q1 An engineering student wants to study the impact of temperature and humidity on yield. The following data was recorded by the student. S.N Temperature Humidity Yield 1 40 57 112 2 45 54 118 3 50 54 128 4 55 60 121 60 66 126 65 59 136 7 70 61 144 8 75 58 142 80 59 149 10 85 56 165
#3
Solve these questions using the data table below please
Question 7.2.9 A chemist has a 5-gallon sample of river water taken downstream from the outflow of a chemical plant. He is concerned about the concentration, c (in parts per million), of a certain toxic substance in the water. He wants to take several measurements, find the mean concentration of the toxic substance for this sample, and have a 95% chance of being within 5 parts per million of the true mean value of c. If the concentration of the toxic substance in all measurements is normally distributed with o = 12.50 parts per million, what is the minimum integer number nof measurements needed to achieve this goal?
man loves, as everyone should, to collect and analyze statistical information. He wishes to find a relationship between how many hours students study and how they do on their statistics tests. He takes a random sample of 16 students at Ideal U., asks how many hours they studied for a university-wide stat test and how they did on the test, enters the data into a computer for analysis and presents the results below. ANALYSIS OF HOURS AND GRADES (n = 16): Descriptive Statistics: HOURS GRADES Mean: 4.2 75.8 Mode: 5.0 79.0 St. Dev: 2.3 10.1 Quartiles: Q0 2.0 34.0 Q1 3.2 53.7 Q2 4.7 78.5 Q3 6.3 86.9 Q4 9.0 97.0 Regression Analysis: Reg. Eq. is: GRADE = 16.9 + 9.025*HOURS Rsquared = .985 std error = 0.027 F = 8.52 p = .018 What problem might there be in using the regression model to predict what grade a student might get if they studied 10 hours? a. The predicted grade for 10 hours is more than 100, which is impossible. b. The value of 10…
A sample of n = 10 scores has a mean of 7. If a new score of X = 18 is added to the sample, what will be the new value for the sample mean? 8.0 8.8 9.78 6.36
A random sample of 42 earthquakes that have occurred between January 2015 and September 2017 was selected and for each earthquake the magnitude of the earthquake and the number of people killed was recorded. The data appear in the scatterplot below. 400 350 300 250 200 150 100 50 0 3 -50 4 5 6 7 8 9 10 -100 -150 Magnitude of Earthquake 8 Consider the scatterplot above question 2. Use this scatterplot to describe completely the relationship between the magnitude of the earthquake and the number of people killed. Positive and linear Negative, moderate, linear O Negative, strong, linear Positive, moderate, linear Number of People Killed ---
Please solve only only the last question.

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