Question 6A study on a range of automotive lubricants reported the following data on oxidation-induction time(min) for various commercial oils:Oxidation-Induction Time: 87103130160180195132145211105145153152138879993119129а.Calculate the sample variance and standard deviation for the oxidation-induction time.

Given data is87,103,130,160,180,195,132,145,211,105,145,153,152,138,87,99,93,119,129sample…

Answered: Question 6 A study on a range of…

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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QUESTION 1 The following is a sample of 10 measurements: 14 14 14 10 12 Compute the following: 1.1. Mean; 1.2. Median: 1.8. Mode; 14. Range.
Question 5 For the following sample data 4 5 9. 10 12 Compute the following measures: (Please keep two decimal places for your answers) а. The mean b. The variance с. The standard deviation d. The coefficient of variation
Question 3 A study was conducted to determine the differences in the average weight loss of four groups of individuals: (1) keto diet (2) gym (3) no exercise; and (4) Intermittent. The data is shown below: Gym No-Exercise – No Diet 11.50 12.00 |Keto Diet 9.00 9.50 8.25 Intermittent Fasting 13.25 11.50 12.55 11.75 12.50 13.00 11.00 10.00 9.25 11.25 13.50 11.50 12.00 11.00 12.50 12.25 8.50 13.75 1.25 a. Conduct the relevant tests and provide the conclusions for the study. b. Provide a brief explanation (3 – 5 sentences) of your study and hypothesis test findings using language as appropriate for a client who is intelligent but is not knowledgeable about statistics. Include figures and tables as you think is appropriate.
QUESTION 3 Find the nearest neighbor statistic for the following pattern assuming a study area of 40 km2. 3.5 km 1 km 2.5 km 1 km 3 km 1 km 2 km O 1.47853 1.13547 1.29972 O 1.39774
QUESTION 17 Four different designs for digital computers circuit are being studied to compare the average amount of noise present. A Completely random design have been conducted and the following data have been obtained: Design Noise observed Design Mean 1. 22.4 20 19 30 18 22.4 60 53.0 41 53 60 53.0 3. 36.6 26 25 35 47 36.6 4 75 65.8 6 63 58 65.8 Does the crcuit design affect the average amount of noise? Use a-0.05. One-way ANOVA: Nolse versus Design Tactor Levela Values Design 4 1, 2, 3, 4 Analyain of Variance Source Dr Adi s8 Ads M PValue F-Value Design 4958 1652.50 22.58 0.000 Error 16 1371 73.20 Total 19 6129 Calculate the Dunnett's significant difference to compare two means.
Question 2: a. Derive the variance of the ith residual in a MLR model, i.e., derive Var(ê;). b. Show that standardizing the PRESS residual, that is, dividing the PRESS residual by its standard deviation, results in ê¿/√0²(1 – häi). c. How does part b. compare to the studentized residual?
QUESTION 35 Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the comparison treatments. Each participant takes the assigned medication and his or her systolic blood pressure is recorded after 6 months on the assigned treatment. The data are as follows. Standard Treatment Placebo New Treatment 124 134 114 111 143 117 133 148 121 125 142 124 128 150 122 115 160 128 Is there a difference in mean systolic blood pressure among treatments? Run the appropriate test at α = 0.05.
QUESTION 5 1. Find the standard deviation of the below data: 7467891 2.708 2.598 7.3333 QUESTION 6
Question 5 The proper operation of web-based applications on a phone requires broadband speeds that do not vary much. Listed below are 13 broadband speeds (in Mbps) measured on 13 different days. 121.3 148.8 137.7 171 126.7 173.4 145.2 174.1 153 143.5 160 145.8 146.9 The mean of the data set is 149.8; the sample standard deviation is 16.557; if the normality plot is not provided you may assume that the broadband speeds are normally distributed. 100 Mb Construct a 99% confidence interval for the variance (standard deviation) of broadband speed for the service provider. i. Procedure: Select an answer Select an answer One mean Z procedure One mean T procedure One variance x² procedure One proportion Z procedure ii. Assumptions: (select everything that applies) The number of positive and negative responses are both greater than 10 Sample size is greater than 30 Population standard deviation is known Simple random sample Normal population Population standard deviation is unknown iii.…
Question 4 According to the American Petroleum Institute, the state taxes (in cents) per gallon of gasoline for all 50 states are as follows: State Taxes Per Gallon of Gasoline (Cents) Frequency 11 - 15 2 16 – 20 3 21 – 25 15 26 – 30 18 31 – 35 8 36 - 40 4 Find each of the following: Mean Model Class Variance
QUESTION 18 Use the following data on distance and interaction frequency: y Interaction frequency x distance Mean 10.3 6.2 Std. dev. What is the standard error of the estimate (i.e., the standard deviation of the residuals)? 4.1 2.8 O 3.052 O 3.214 O 3.117 O 3.250

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