DA certain article reported the following observations, listed in increasing order, on drill lifetime (number of holes that a drill machines before it breaks) when holes were drilled in a certain brass alloy.12 15 2143 475023 30 37 3868 72 74 76 77 7990 93 95 99 100 10358 60 65 6782 83 86 88104 104 111 118162124 137 140 141 147 158169 185 205 249 263 289 321 389 514USE SALTCompute the sample median, sample mean, 10% trimmed mean, and 25% trimmed mean for the lifetime data. (Round 25% trimmed mean to four decimal places.)sample mediansample mean10% trimmed mean25% trimmed meanCompare these measures.

Let X be the given data and arrange X in increasing order…

Answered: A certain article reported the…

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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Isle Royale, an island in Lake Superior, has provided an important study site of wolves and their prey. Of special interest is the study of the number of moose killed by wolves. In the period from 1958 to 1974, there were 296 moose deaths identified as wolf kills. The age distribution of the kills is as follows. Number Killed by Wolves Age of Moose in Years Calf (0.5 yr) 1-5 114 49 71 11-15 16-20 59 3 (a) For each age group, compute the probability that a moose in that age group is killed by a wolf. (Round your answers to three decimal places.) 0.5 1-5 6-10 11-15 16-20 (b) Consider all ages in a class equal to the class midpoint. Find the expected age of a moose killed by a wolf and the standard deviation of the ages. (Round your answers to two decimal places.)
The data show the population (in thousands) for a recent year of a sample of cities in South Carolina. 13 21 24 26 66 16 23 15 16 30 28 35 90 18 30 26 21 27 103 48 22 48 106 34 33 56 the data value---? Corresponds to the 48th percentile?
A certain article reported the following observations, listed in increasing order, on drill lifetime (number of holes that a drill machines before it breaks) when holes were drilled in a certain brass alloy. 12 15 21 23 30 58 60 65 68 67 82 83 86 88 104 104 111 118 124 137 140 141 147 158 USE SALT sample mean 10% trimmed mean 25% trimmed mean 90 773 15 268 Compare these measures. 72 93 38 43 47 50 162 169 185 205 249 263 289 321 389 514 74 76 77 79 95 99 100 103 Compute the sample median, sample mean, 10% trimmed mean, and 25% trimmed mean for the lifetime data. (Round 25% trimmed mean to four decimal places.) sample median PRACTICE ANOTHER 4
130 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0 16 0.1231 16 1 21 0.1615 37 2 17 0.1308 54 3 15 4 15 0.1154 84 5 14 0.1077 98 6 16 0.1231 114 7 0.1231 130 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 5 times per week? %
The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it needs to be replaced. A consumer group tests this claim by surveying a random sample of 10 owners who had the fuel injection system replaced. The ages of the cars at the time of replacement were (in months): 21 46 49 48 53 46 30 51 42 52 A USE SALT (i) Use your calculator to calculate the mean age of a car when the fuel injection system fails x and standard deviation s. (Round your answers to four decimal places.) X = months months (ii) Test the claim that the fuel injection system lasts less than an average of 48 months before needing replacement. Use a 5% level of significance. What are we testing in this problem? O single mean O single proportion (a) What is the level of significance? 0.05 State the null and alternate hypotheses. O Ho: H = 48; H,: H # 48 O Ho: p = 48; H,: p # 48 O Ho: p = 48; H: p > 48 O H: H = 48; H,: µ 48 (b) What sampling distribution will you use? What assumptions…
The weekly wages (to the nearest K) of the production line workers in small factory is shown in the table below: Weekly wage (K) Number of workers 16 – 25 5 26 – 35 16 36 – 45 14 46 – 55 22 56 – 65 26 66 – 75 14 i. Calculate the estimate of the mean wage ii. Find an estimate for the median wage iii. Find an estimate for the modal wage iv. Find an estimate for the quartile deviation wage v. Compute the coefficient of variation
Consider the following observed weights (in kilograms) of a randomsample of 20 learners and use it to estimate the true value of theaverage weight of learners enrolled in the class. 40 45 46 48 48 50 55 55 56 5858 59 60 60 62 62 64 64 65 66 1. Compute the mean.2. Interpret the result.

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