**Transcription for Educational Website****Sample Analysis of Aluminum-Alloy Channels**Samples of aluminum-alloy channels were tested for stiffness. The following frequency distribution was obtained. The distribution is assumed to be normal.| **Stiffness** | **Frequency** ||---------------|---------------|| 2480 | 23 || 2440 | 35 || 2400 | 40 || 2360 | 33 || 2320 | 21 |**Question:**What is the approximate mean of the population from which the samples were taken?- [ ] 2367- [ ] 2398- [ ] 2402- [ ] 2419**Explanation:**This table presents a frequency distribution of stiffness values observed in aluminum-alloy channels. Each stiffness value corresponds to the number of samples exhibiting that specific stiffness. The goal is to determine the mean stiffness of the sampled population, which can be approximated using statistical methods.

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Answered: Samples of aluminum-alloy channels were…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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The data represents the body mass index (BMI) values for 20 females. Construct a frequency distribution beginning with a lower class limit of 15.0 and use a class width of 6.0. 17.7 33.5 26.7 25.6 25.4 28.2 23.4 18.3 28.7 22.7 19.2 21.9 25.6 37.7 32.4 29.7 44.9 30.9 29.5 25.3 Body Mass Index Frequency 15.0-20.9 nothing 21.0-26.9 nothing 27.0-32.9 nothing Body Mass Index Frequency 33.0-38.9 nothing 39.0-44.9 nothing
The last digit of the heights of 58 statistics students were obtained as part of an experiment conducted for a class. Use the following frequency distribution to construct a histogram. What can be concluded from the distribution of the digits? Specifically, do the heights appear to be reported or actually measured? Digit Frequency 0 15 1 5 2 3 4 3 23456789 13 A w war w 5 3 3 4 Choose the correct histogram below. A. O B. C. D. 32- 16- 16- 0 1 2 3 4 5 6 7 8 9 Laba 0 1 2 3 4 5 6 7 8 9 32- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 Are the data reported or measured? OA. The data appears to be measured. The heights occur with roughly the same frequency. B. The data appears to be reported. Certain heights occur a disproportionate number of times. C. The data appears to be measured. Certain heights occur a disproportionate number of times. D. The data appears to be reported. The heights occur with roughly the same frequency.
A boat capsized and sank in a lake. Based on an assumption of a mean weight of 133 Ib, the boat was rated to carry 70 passengers (so the load limit was 9,310 Ib). After the boat sank, the assumed mean weight for similar boats was changed from 133 lb to 174 lb. Complete parts a and b below. a. Assume that a similar boat is loaded with 70 passengers, and assume that the weights of people are normally distributed with mean of 181.1 Ib and a standard deviation of 38.6 lb. Find the probability that the boat is overloaded because the 70 passengers have mean weight greater than 133 lb The probability isO: (Round to four decimal places as needed.) b. The boat was later rated to carry only 17 passengers, and the load limit was changed to 2,958 Ib. Find the probability that the boat is overloaded because the mean weight of the passengers is greater than 174 (so that their total weight is greater than the maximum capacity of 2,958 Ib). The probability is. (Round to four decimal places as needed.)…
Given the following frequency distribution table for a set of data about the weights of rainbow trout (in pounds) caught by all visitors at a lake on a Saturday afternoon, construct a histogram that accurately summarizes the data. Weight (in pounds) Frequency 4.5-6.5 5 6.5-8.5 2 8.5-10.5 5 10.5-12.5 6 12.5-14.5 2 14.5-16.5 1 Create the corresponding histogram to represent this data below. Drag the dots on the top of the histogram to create the chart.
1. Compute the variance of the number of boats sold daily (show your calculation prices in a table) 2. Compute the standard deviation of the number of boats sills daily.
Examine the frequency distribution. What is the width of a class in this frequency distribution? Enter your answer as a number, like this: 42
The data represents the body mass index (BMI) values for 20 females. Construct a frequency distribution beginning with a lower class limit of 15.0 and use a class width of 6.0. 17.7 33.5 26.9 24.3 24.6 29.2 25.4 18.3 28.5 21.7 19.2 22.6 22.1 37.7 35.4 27.6 44.9 31.5 27.7 23.9 Body Mass Index Frequency 15.0-20.9 21.0-26.9 27.0-32.9 33.0-38.9 39.0-44.9
please answer blank questions only and or ones with a red x next to them.
Consider a sample with data values of 57,45,50,39,50,59,60, and 48. Compute the following values a. Mode b. 40th percentile c. Variance d. Standard deviation e. Coefficient of variation
Refer to the accompanying data set and use the 30 screw lengths to construct a frequency distribution. Begin with a lower class limit of 2.970 in, and use a class width of 0.010 in The screws were labeled as having a length of 3 in Click on icon to view the data -X Data table Screw Lengths (inches) 2.977 3,002 2.991 2.979 2.982 2.991 3.004 2978 3.002 3.009 3.005 2.997 2.992 2.983 2.991 3.001 3.006 2.987 2.994 3.014 2.998 3.011 3.005 3.009 2.986 2.981 3.002 2.986 3.003 2.993 n
The following data set shows project grades for an elementary statistics class. 20 21 b.) median = 25 11 c.) range= 16 15 d.) standard deviation = 21 13 13 24 18 21 22 26 24 14 Use the data to find each of the following values for this data: (if necessary, round to two decimal places) [BE SURE TO CHECK YOUR DATA IN THE CALCULATOR] a.) mean = 13 18 12 15
The data represents the body mass index (BMI) values for 20 females. Construct a frequency distribution beginning with a lower class limit of 15.0 and use a class width of 6.0. 17.7 33.5 26.3 25.7 21.3 27.4 24.8 18.3 29.2 24.6 19.2 25.9 22.7 37.7 32.8 28.4 44.9 32.8 29.9 23.4 Body Mass Index Frequency Body Mass Index Frequency 15.0-20.9 33.0-38.9 21.0-26.9 39.0-44.9 27.0-32.9

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