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 increaseA(ВEIf 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 setIf someone whose height was exactly equal to the mean were added to the data set

The heights of all classmated are recorded and the standard deviation is calculated.

Answered: Elana recorded the height of all of her…

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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Two teachers have a friendly rivalry. They want to know which of their students did better on their respective final exams. The first teacher teaches chemistry and her 49 students had a mean = 68. The national mean and standard deviation for this exam is 65 and 10, respectively. The second teacher teaches history and his 64 students had a mean = 72. The national mean and standard deviation for this exam is 70 and 7, respectively. Taking into account the average performance of students on chemistry and history exams nationwide, which teachers' students did better on their respective final exams?
For fun a medical school professor once made a class of med students jump up and down for 1 minute and then measure their heart rate. Below are the values that were recorded: 136 144 99 145 135 125 115 127 124 101 100 103 130 119 121 123 116 115 126 114 125 125 116 137 152 Using StatCrunch - report back to the class the mean, median, and std deviation for the data by pasting the output into Word and attaching it to your post. Graph the data as a histogram with a fit to a Normal curve and include this in your Word document. One of the students had a rate of 127 and exclaimed, "I am in better shape than all you people!" Compute a z score to prove them right or wrong.
Please find a,b,c and d
A medical lab tested a sample of 8 vials of blood for acidity on the pH scale. Use this data to answer the questions that follow: 7.4, 7.5, 7.2, 7.4, 7.2, 7.1, 7.2, 7.3Use your calculator to find the mean, median, mode, and standard deviation for this sample. Round your answers to four decimal places if necessary.
Please answer B, C, & D.
Sarah'sscore on the Stats midterm was 81 points. The class average was 76 and the standard deviation was 5 points. What was her z-score? z=
The manager of a department store wants to estimate the average amount ofmoney a customer will spend in her store. She estimates from past experiencethe standard deviation is $30. How big of a sample should she take to be 95%sure her estimate is off by no more than $5?
On a nationwide math test, the mean was 51 and the standard deviation was 4. If Roberto scored 85, what was his z-score?
On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90, what was his z-score?
Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte scored a 688 on a test with a mean of 493 and a standard deviation of 150. What score would I have to get on a test with a mean of 85 and a standarddeviation of 15 to have the best score out of the three of us?
Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below. Pierce got a score of 71.5; this version has a mean of 62.5 and a standard deviation of 15. Vincent got a score of 309.2; this version has a mean of 294 and a standard deviation of 19. Norma got a score of 7.96; this version has a mean of 7.2 and a standard deviation of 0.4. If the company has only one position to fill and prefers to fill it with the applicant who performed best on the aptitude test, which of applicants should be offered the job?
Students taking the Graduate Management Aptitude Test averaged 812 with a standard deviation of 145. Only those in the top 20 percent can apply for a particular scholarship. Gus Genius received a 900 on the test. Can he apply?

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