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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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Data point X value is 120 and has an assigned weight of 5 Data point Y value is 300 and has an assigned weight of 7 Data point Z value is 285 and has an assigned weight of 2 What is the weighted average? Round to one decimal place.
Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…
which one is the greatest?
Wetlands offer a diversity of benefits. They provide a habitat for wildlife, spawning grounds for U.S. commercial fish, and renewable timber resources. In the last 200 years, the United States has lost more than half its wetlands. Environmental Almanac gives the percentage of wetlands lost in each state in the last 200 years. For the 30 of the lower 48 states, the percentage loss of wetlands per state is as follows. 83 59 35 30 33 45 45 50 59 87 35 50 37 20 68 48 71 51 51 60 38 87 38 9 42 90 42 50 27 27 Make a stem-and-leaf display of these data. (Use the tens digit as the stem and the ones digit as the leaf. Enter NONE in any unused answer blanks.) How are the percentages distributed? Is the distribution skewed? Are there any gaps? (Select all that apply.) a)The percentages are concentrated from 20% to 60%. b)These data are strongly skewed left. c)There are no gaps in the data. d)These data are fairly symmetric, perhaps slightly skewed right. e)There is a gap…
4.49 Couldn’t fit the whole chart but the last one is Vermont and the numbers are 11 and 6
Part 3. 1. By relying on the data table below, determine the weighted average of all data. Rounded to the nearest unit.
Ink Replay Replay 3. A survey taker randomly approached 344 individuals in the mall, hoping to ask some survey questions. Only 206 people agreed to participate. They were asked (1) their sex; (2) whether or not they exercise. The results are below. Men Women Do not exercise 16, 31.4% Do not exercise 48, 31.0% Exercise 35, 686% Exerci se" 107 690% What proportion of the men exercise? -68.6% What proportion of the women exercise? -69.0% Do the two variables (sex and whether or not someone exercises) seem to be associated? Explain. What proportion of those who exercise were women? What proportion of those who exercise were men? Do your answers d. and e. make you rethink your response to c.? Explain. Is it misleading that the two pies are the same size? Explain. D Focus
Plz ans d and e part only
24
your car is more crowded than you think. table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.

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