4. A mathematics placement test is given to all entering freshmen at a small college. Astudent who receives grades below 35 is denied admission to the regular mathematicscourse and placed in a remedial class. The placement test scores and the final grades for20 students who took the regular course were recorded as follows:StudentPlacement Test (X) Course Grade (Y)505335413356144056555686536735118607099079103590591154128091136048146071156071164047175553185068196557205079c. Graph the estimated regression line.

For the given data graph the estimated regression line

Answered: 4. A mathematics placement test is…

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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19. A high school math teacher summarized the 35 math SAT scores for the students in her calculau class. The mean for the class was 521 and themedian was 535. The range of the scores was 235 and the highest score in the entire class was 675. Approximately 40% of the lass scored higher than 562. State whether each of the following is true or false. a. The 45th percentile exceeds 540. b. The lowest score in the class was 440. c. The z-score for a score of 510 is a negative number. d. The third quartile exceeds 562. e. The percentile rank of 562 is 40.
Suppose a survey conducted in 2012 asked a group of adults from a certain country whether they drink seltzer water. Of the 3,062 people who responded, 22.8% said they drink seltzer water. Complete parts a through d. a. Identify the sample. What is the sample? A. The group of adults in the particular country who did not respond to the survey B. The 22.8% who reported they drink seltzer water C. The 3,062 people who responded D. All adults in the particular country b. Identify the population. What is the population? A. All of the adults in the world B. The 22.8% of respondents in the survey who reported they drink seltzer water C. All of the adults in the particular country D. The 3,062 people who responded to the survey
Suppose we want to compare the GPA for students in at least three different social classes (Upper, Middle, Working). We obtain GPA records for a randomly selected set of 30 students, ten from each social class group. What test should you use and why?
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