20 A The data below is a distribution of the marks (with a maximum of 45) obtained by students in a test. Investigate whether the data is negatively or positively skewed. Marks 31-35 36-40 41-45 46-50 51-55 56-60 61-65 Frequency 15 22 20 11 8 13 10 B The distribution below shows the heights of students of diverse age groups. Determine the extent of the relationship between the ages of students and their heights using the Spearman's rank correlation coefficient. Age (x) 23 24 25 26 27 28 Height (y) 23 19 15 11 7 25

20 A The data below is a distribution of the marks (with a maximum of 45) obtained by students in a test. Investigate whether the data is negatively or positively skewed. Marks 31-35 36-40 41-45 46-50 51-55 56-60 61-65 Frequency 15 22 20 11 8 13 10 B The distribution below shows the heights of students of diverse age groups. Determine the extent of the relationship between the ages of students and their heights using the Spearman's rank correlation coefficient. Age (x) 23 24 25 26 27 28 Height (y) 23 19 15 11 7 25

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 data represent the time, in minutes, spent reading a political blog in a day. Construct a frequency distribution using 5 classes. In the table, include the midpoints, relative frequencies, and cumulative frequencies. Which class has the greatest frequency and which has the least frequency? 14 5 11 2 3 19 6 15 15 18 1 18 11 4 13 0 14 6 12 16 Complete the table, starting with the lowest class limit. (Simplify your answers.) Class Frequency Midpoint Relative Frequency Cumulative Frequency nothing-nothing nothing nothing nothing nothing nothing-nothing nothing nothing nothing nothing nothing-nothing nothing nothing nothing nothing nothing-nothing nothing nothing nothing nothing nothing-nothing nothing nothing nothing nothing Which class has…
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The data represent the time, in minutes, spent reading a political blog in a day. Construct a frequency distribution using 5 classes. In the table, include the midpoints, relative frequencies, and cumulative frequencies. Which class has the greatest frequency and which has the least frequency? 8 8 36 14 31 39 32 36 19 3 4 25 26 12 16 9 Complete the table, starting with the lowest class limit. (Simplify your answers.) Relative Cumulative Class Frequency Midpoint Frequency Frequency Which class has the greatest frequency? The class with the greatest frequency is from to Which class has the least frequency? The class with the least frequency is from | to
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…
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