A group of students were timed in their efforts to complete an F1 concession task fora certain module. The times (in seconds) of 20 students are summarised in thefollowing stem-and-leaf plot:Stem4568Leaf1567890 1 24 5688033574|1= 41Figure 1: Stem-and-leaf plot6Calculate the mean (correct to three decimal places).Calculate the median.What is the difference between unimodal and bimodal?Are the data in this scenario unimodal or bimodal? Which time score(s)occurred most frequently?

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Twenty five right-handed students were asked to turn a knob (using 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). The data presented below gives the times (in seconds) each subject took to move the indicator a fixed distance: Obs.# R Obs.# R L L Obs.# R 1 113 8 116 166 22 100 2 105 105 9 75 146 23 89 3 130 133 10 96 123 24 85 4 101 108 11 122 135 25 88 5 138 115 12 103 6 118 170 13 116 7 87 103 14 107 At 1% level of significance, can we conclude that these right-handed students found it easier to use the knobs with a right-hand thread? Use the following form of the difference: right-left. 1. Test Stat: L 137 2. Critical Region: a. T> 2.492 b. Tabs (2.492) c. T> abs (-2.492) d. T < -2.492 Obs.# R 15 118 16 103 17 111 18 104 19 111 147 20 89 87 21 78 145 78 107 84 148 112 93 76 L 116 78 101 123 3. Conclusion:…
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A group of students were timed in their efforts to complete an F1 concession task for a certain module. The times (in seconds) of 20 students are summarised in the following stem-and-leaf plot: Stem 4 5 6 8 Leaf 156789 01245688 03357 O