Elana recorded the height of all of her classmates and calculated the standard deviation. If everything else stayed the same, what change to the data would make the standard deviation increase?(A)BDOIf the tallest person were tallerIf the shortest person were tallerIf everyone in the class were one inch tallerIf the tallest and shortest person were removed from the data set(E) If someone whose height was exactly equal to the mean were added to the data set3SSLE%OOll8&

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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 scores on two standardized tests are normally distributed.The first test had a mean of 58 and a standard deviation of 10.The second test had a mean of 80 and a standard deviation of 3.What score would you need on the second test to equal a score of 62 on the first test?Give answer to the nearest whole number.
Marla scored 70% on her last unit exam in her statistics class. When Marla took the SAT exam, she scored at the 70th percentile in mathematics. Explain the difference in these two scores.
The scores on two standardized tests are normally distributed. The first test had a mean of 50 and a standard deviation of 6. The second test had a mean of 70 and a standard deviation of 5. What score would you need on the second test to equal a score of 62 on the first test? Give answer to the nearest whole number.
the average (mean) score on an exam was 76.52 in a class consisting of 14 supply chain students and 11 HR students. If the 14 supply chain students averaged 84, what was the average score of the 11 HR students?
Round each z-score to the nearest hundredth.A data set has a mean of x = 4079 and a standard deviation of 113. Find the z-score for each of the following. (a) x = 3840(b) x = 4200(c) x = 4300(d) x = 4030
Adam just graded his exams. the mean score is 74, the median is 76.5, the range is 65 and the standard deviation is 11. If he decides to add 7 points to each student's score to curve, what will the new mean, median, range, and standard deviation be Explain step by step
ONLY SOLVE C The speed at which people type is measured in terms of words per minute (wpm). The WPM data file contains the typing speeds in wpm for 39 individuals. Download this data and import it into R or RStudio and answer the following questions.(a) Use R to compute the mean, median, and standard deviation wpm.Mean: x―= wpm (Include all decimals printed by R)Median: x~= wpm (Include all decimals printed by R)Standard deviation: s= wpm (Include all decimals printed by R)(b) Use R to compute the 30th percentile.Answer: wpm (Include all decimals printed by R)(c) 35% of wpm values are greater than what wpm? Use R.Answer: wpm (Include all decimals printed by R)
According to this data, what is the "normal range" for creatinine levels? That is, in what range will 95% of healthy individuals' creatinine levels fall? use ( = 0.97 mg/dL, s = .07 mg/dL) Please select the single best answer .90 - 1.04 mg/dL .83 - 1.11 mg/dL .76 - 1.18 mg/dL .69 - 1.25 mg/dL
Find the simple standard deviation of the data. Be sure to include the screenshot of excel of your answers and formulas/command that you use.
Raw scores on standardized tests are often transformed for easier comparison. A test of Math ability has a Mean of 153 and a Standard Deviation of 10 when given to 3rd-graders. While 6th-graders have a Mean of 164 and a Standard Deviation of 7 on the same test. Leslie is a 3rd-grade student who scores 159 on the test. Hollis is a 6th-grade student who scores 168 on the test. Calculate the z-score for each student. Who scored higher within their grade-level? O Hollis; because her z-score is closer to the Mean for 6th-graders than Leslie's is for 3rd-graders. Leslie; because her z-score is larger than Hollis' z-score. O Leslie; because she is almost as smart as Hollis. O Hollis; because 168 is higher than Leslie's 159. O Leslie; because she is 6 points higher than the 3rd-grade level Mean while Hollis is only 4 points higher than the 6th-grade level Mean. Question 6 4 pts
The United Nations stores statistics about all the live births in the United States. The latest data concerns the birthweights of infants born in 2015. The μ is 3056 grams and the σ is 514 grams. Calculate the total weight of twins, one born one standard deviation below the mean and the other born two standard deviations below the mean. What is the total weight

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