Question

PLEASE ANSWER BOTH QUESTIONS AND USE DROP DOWN MENU, I HAVE INCLUDED THE DATA SET! THANK YOU

Subjects Right-hand Thread Left-hand Thread 1 86.2 123.3 2 106.5 97.8 3 74.5 104.0 4 83.8 101.6 5 154.3 140.7 6 127.1 99.0 7 106.9 131.7 8 99.8 91.2 9 111.8 115.6 10 118.8 123.2 11 120.6 127.8 12 142.3 111.7 13 76.4 130.7 14 145.5 121.0 15 124.4 138.7 16 119.6 133.1 17 122.8 107.8 18 85.5 99.4 19 118.3 149.1 20 102.0 126.5 21 102.3 83.8 22 118.1 145.5 23 132.0 110.4 24 101.1 136.0 25 118.2 131.6 26 105.4 122.0 27 112.1 113.6 28 109.4 95.5 29 109.5 128.5 30 111.6 115.8 31 106.2 95.0 32 103.4 112.5 33 115.7 102.6 34 105.7 97.5 35 120.9 133.9 36 143.9 161.7 37 145.5 124.1 38 134.1 147.8 39 128.1 115.0 40 120.4 133.0 41 145.3 125.8 Question 15 2 pts The design of controls and instruments has a large effect on how easily people can use them. A student project investigated this effect by asking a group of right-handed students to turn a knob (with their right hands) that moved an indicator by screw action. There were two identical instruments, one with a right-hand thread (the knob turns clockwise) and the other with a left-hand thread (the knob turns counterclockwise). Each of the students used both instruments. The times required (in seconds) to move the indicator a fixed distance were measured. The project hoped to show that right-handed people find right-hand threads easier to use. Let Ha be the mean difference in time to complete the task between the two threads calculated by the time with the right- hand thread minus the time with the left-hand thread. Step 1: The alternative hypothesis is Omd=0 Она to O Md > 0 OM <0 Question 16 8 pts Continued from the previous question: Step 2: The data are given in an Excel file "Final (DATA)-Threads." Perform the test at a = 5% using Excel Data Analysis and answer the following questions: 1. The test statistic ✓ Choose1 We conclude that there is no evidence that right-hand people find right-hand threads more difficult to use than left-hand threads. -1.850 We conclude that right-hand people find right-hand threads more difficult to use than left-hand threads. 2. The conclusion of the test -5.102 3. A point estimate associated with a 95% confidence interval for the mean difference 4. The margin of error associated with a 95% confidence interval for the mean difference - 10.194 We conclude that right-hand people find right-hand threads easier to use than left-hand threads. 7.594 We conclude that the average time to move right-hand threads is the same as that to move left-hand threads, -2.713 -1.457 -8.748 -4.613 We conclude that there is no evidence that right-hand people find right-hand threads easier to use than left-hand threads. 6.398 4.428 -2.407 Question 17 ots 5.574

Answer 1

15 ) H120 option ) 1-13 16 ) test statistic ita Sann - - -6 2197 Scha () - 2777 y: 6 2 1 - 0 9 0 2าาาา 9-4591Dา या

: 40 to, - 1:459477 df file 41-13 P. value 0.076121 1 p-value 10076112 ) » (0.001 Trene do not reject to no evidence the night hand threads Easies to There in people find night hand than left hand threads use 3....95 af = 40 d:0.05 talzialfa 9.02/ Point estimate: 80.27775 V41 3:1668. 5. 4. The margin Error Adidj x 3-1668 22:02 1 X 3.1668 36:4001