A researcher selects a random sample of 138 collegeWhich of the following contributed the most to thestudents from her local university. For each student,value of the x? statistic?she records if they are full- or part-time and whetherfull-time student and sleeps wellthey sleep well. She would like to know if there isconvincing evidence that school schedule isassociated with sleeping. Let a = 0.05.part-time student and sleeps wellfull-time student and does not sleep wellThe observed and expected counts are displayed inpart-time student and does not sleep wellthe tables.Observed counts:Sleep Well?YesNoFull-Time2837SchedulePart-Time4924Expected counts: The observed and expected counts are displayed inO part-time student and does not sleep wellthe tables.Observed counts:Sleep Well?YesNoFull-Time2837SchedulePart-Time4924Expected counts:Sleep Well?YesNoFull-Time36.328.7SchedulePart-Time40.732.3

The correct answer is option c which is full time students and sleep well

Answered: A researcher selects a random sample of…

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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3. Can SAT scores predict college performance? Let x be a variable that represents SAT score of a computer science major, and let y be a variable that represents a student’s GPA upon graduation. A random sample of n =15 computer science majors provided their SAT scores and GPAs: x 1232 1070 1086 1287 1130 1048 1121 1095 1135 1208 1333 1160 1186 1243 1261 y 3.52 2.91 2.4 3.47 3.47 2.37 2.4 2.24 3.02 3.32 3.59 2.54 3.19 3.71 3.58 The scatter diagram for the SAT score and GPA is given below: (a) Find the sample correlation coefficient r. Truncate to two decimal places. What does the value tell you about the data? (b) Find the equation of the least squares line . Truncate to four decimal places. What does the slope mean? (c) Find the value of the coefficient of determination . Truncate to two decimal places. What does this number mean? (d) What is the predicted GPA if a computer science major got a…

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