A certain article reported the following observations, listed in increasing order, on drill lifetime (number of holes that a drillmachines before it breaks) when holes were drilled in a certain brass alloy.1014 20 23 31 37 39 44 475961 647767 69 70 73 7593 95 988285 86 90 91101106 106 111 119 123 137 140 141160147 157169 185 207 247 264 290 323 387 513USE SALT5078105Compute 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 median92sample mean10% trimmed mean25% trimmed mean119.32Compare these measures.

The number of observations is 50

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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The data below represent the prices of different items in a supermarket, construct the frequency table (use 6 classes) and find: 1) Мean 2) Median 3) Mode 4) Variance 5) Standard deviation 165 186 122 172 140 153 208 169 156 114 113 135 131 125 177 136 171 179 152 155 136 127 112 188 116
Find the sample standard deviation for the following Grouped Frequency Data Table (GFDT). Lower Class Limit Upper Class Limit Frequency 40 44 1 45 49 8 50 54 3 55 59 4 60 64 6 65 69 11 70 74 2 75 79 9 80 84 5
The age at inauguration for each U.S. President is shown in the sequence of data values below. 57 54 52 55 51 56 61 68 56 55 54 61 57 51 46 54 51 52 57 49 54 42 60 69 58 64 49 51 62 64 57 48 50 56 43 46 61 65 47 55 55 54 28 92 1) Find the 27th 39th, 45th, 68th, and 82th percentiles. 2) Make a five number summary and a boxplot for the given data. 3) Find the outliers using the IQR times 1.5 rule. If there is an outliers, make a modified boxplot for the given data and use asterisks (*) to indicate any outlier.
a) Calculate the unbiased estimate for the population mean b) Calculate the unbiased estimate for the population standard deviation
15. Diameter of Douglas Fir Trees The diameter of the Douglas fir tree is measured at a height of 1.37 meters. The S following data represent the diameter in centimeters of a random sample of 12 Douglas firs in the western Washington Cascades. 156 162 147 173 147 190 130 101 159 113 181 109 Source: L. Winter. "Live Tree and Tree-Ring Records to Reconstruct the Structural Development of an Old-Growth Douglas Fir/Western Hemlock Stand in the Western Washington Cascades." Corvallis, OR: Forest Science Data Bank, 2005. (a) Obtain a point estimate for the mean and standard deviation diameter of a Douglas fir tree in the western Washington Cascades. (b) Because the sample size is small, we must verify that the data come from a population that is normally distributed and that the data do not contain any outliers. The figures show the normal probability plot and boxplot. The correlation between the tree diameters and expected z-scores is 0.982. Use Option 1 or Option 2 to determine if the…
pauieidxa aJe Pien aun 2. Consider the following data on the hours of burnout for a sample of 59 lightbulbs 68 70 86 88 62 61 79 92 116 103 68 63 88 81 62 74 62 94 71 70 58 98 98 65 73 71 70 97 94 59 57 90 71 101 78 43 59 67 61 71 96 75 64 76 72 77 74 65 82 86 66 86 96 107 57 97 86 59 83 Describe the shape of the data using coefficient measures based on the moments 3. Ten competitors in a beauty contest are ranked by three judges as follows: Competitors Judges 6. 7 8 9. 10 1|Page
The data given is shown below 40 40 43 46 44 49 51 54 46 51 47 49 49 45 45 44 45 41 49 52 51 54 50 51 41 52 53 50 46 56 42 42 40 42 49 47 51 48 46 57 48 55 49 46 57 44 49 43 44 43 51 48 48 46 49 Class width = 6 Find the following: A. standard deviation B. Variance C. Percentile (50th)
The following sample data give the flexural strength (MPa) for concrete beams of a certain type. 7.3, 6.3, 6.8, 7.0, 7.6, 6.8, 7.0, 6.3, 7.9, 9.0, 7.8, 9.7, 7.8, 11.6, 11.8, 10.7 Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion, and give the estimator you used. O Etr(6.25) = 8.09 μ. 8.21 * = 8.21 * = 8.14
Referring to Table 2, the mean square for the factor filling time is____ 1). 0.9030 2). 0.4234 3). 0.4515 4). 0.2117
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
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