1. Two electric car engine/battery systems A and B were compared. The amount of miles driven on a single charge wasmeasured. The results of the experiments are given in the following table.SystemANumber of Trials5075Average Mileage3642a. Find a 99% confidence interval for uB – HA, the difference in population mean mileages for battery systems Band A. Assume we know the population standard deviations are 6 miles for A and 8 miles for B.b. The engineer for battery system A says that "Engine system A performs just as well as system B. While thesample average for B, 42, is higher than that of A, 36, these are just the results of a limited experiment and due tosample variance." Based on your Confidence Interval you found in part (a), would you agree or disagree with theclaim that the systems perform equally?

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Answered: 1. Two electric car engine/battery…

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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A student would like to estimate the proportion of students at his school who have lunch during period 4. To do so, he selects a random sample of 40 students and finds that 30% of them have period 4 lunch. Later, he goes to the guidance office and finds that of the 380 students at this school, 25% of them have period 4 lunch. Which of the following properly describes the number, 25%? O sample O statistic O population O parameter Save and Exit Next Submit Mark this and return hp $ & 4. 6. 7 8 e r y f j k
Given the following details about a multiple regression model based on a sample of 19 observations : bo = 17, b, = 4, b2 = -3, b3 = 8, Sum of squares due to error =177,and Sum of squares due to regression = 850 Find the mean square error (MSE): Select one: O a. 60.71 Ob. 12.64 Oc. 56.67 Od. 11.80
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2.18 2.42 2.57 2.89 Suppose the data represent the inches of rainfall in April for a certain city over the course of 20 years. 4.79 D 0.53 0.76 1.23 1.37 1.86 3.37 3.66 3.88 4.09 4.49 5.04 5.36 5.79 Given the quartiles Q, = 2.020, Q, = 3.280, and Q3 = 4.640, compute the interquartile range, IQR. 3.19 6.08 IQR =D (Round to three decimal places as needed.)
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