Task 2: The following example is from the online Nature textbook . As you know,

Question

Task 2: The following example is from the online Nature textbook. As you know, there is an ongoing controversy over whether or not cell-phone usage while driving results in more traffic accidents. One hypothesis is that reaction time is slowed down while having a conversation on a cell phone. A simple study was designed to test whether reaction times are indeed slowed down while on the phone, without putting the subjects at risk of an accident. In this study, 8 students are asked to catch a falling object (a ruler) while talking on the phone, and to repeat the experiment while not talking on the phone (not necessarily in that order).

I DONT KNOW HOW TO FINISH THE TABLE AND THE GRAPH. PLEASE SHOW WORK SO I CAN LEARN. THANK YOU.

"c ::S Lecture 02 worksheet-Scientific Method [Compatibility Mode] Noldirnia Delgado- × Table Tools Insert Design Layout References Mailings Review View Help Design Layout Tell me what you want to do d% Cut Copy Find . ece Paste Normal TNo Spac. Heading1 Heading 2 itle Subtitle Subtle Em.. Emphasis Select Fonmat Painter Clipboard Font Paragraph Editing Response time (seconds) Variance (x-mean) With cell phones Test subject With c Without Without es cell phones hones (5-4.38) A2 (3-2.25) 2 (3-4.38) A2 (1-2.25) A2 (3-4.38) A2 1-2.25) 2 (4-4.38) A2 (2-2.25) 2 .56 1.90 =.14 (6-4.38) A2 (2-2.25) 2 ,06 -2.62 (3-4.38) A2 (4-2.25) 2 ,06 -3.06 (7-4.38) 2 (3-2.25) A2 -6.86 .56 (4-4.38) A2 (2-2.25) A2 = .06 4.38 Mean seconds seconds 2.25 There are two ways to calculate Page 3 of4 530 wordsEnglish (United States) + 110% O Type here to search 612 PM 9/4/2018

Explanation / Answer

Variance can be calculated by adding up individual variances,

Variance for group with cell phones = (0.38+1.90+1.90+0.14+2.62+1.90+6.86+0.14)

= 13.22

Variance for group without cell phones = (0.56+1.56+1.56+0.06+0.06+3.06+0.56+0.06)

= 7.48

Standard deviation can be calculated by taking square root of variance.

For group with cell phones, SD = square root of 13.22 = 3.636

For group without cell phones, SD = square root of 7.48 = 2.735

There are 8 samples in both groups.

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