A survey was conducted to investigate motor fuel octane ratings
of several blends of gasoline, and...
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A survey was conducted to investigate motor fuel octane ratingsof several blends of gasoline, and the following data ispresented:
88.5
98.8
89.6
92.2
92.7
88.4
87.5
90.9
94.7
88.3
90.4
83.4
87.9
92.6
87.8
89.9
84.3
90.4
91.6
91.0
93.0
93.7
88.3
91.8
90.1
91.2
90.7
88.2
94.4
96.5
89.2
89.7
89.0
90.6
88.6
88.5
90.4
84.3
92.3
92.2
89.8
92.2
88.3
93.3
91.2
93.2
88.9
91.6
87.7
94.2
87.4
86.7
88.6
89.8
90.3
91.1
85.3
91.1
94.2
88.7
92.7
90.0
86.7
90.1
90.5
90.8
92.7
93.3
91.5
93.4
89.3
100.3
90.1
89.3
86.7
89.9
96.1
91.1
87.6
91.8
91.0
91.0
Construct stem-and-leaf diagram for these data and compute thesample quartiles. (10 pts)
Compute sample median, mode, mean, variance and standarddeviation. (5 pts)
Construct a frequency distribution and histogram for theratings by using eight bins. What is the shape of the distribution?(10 pts)
On Excel
Answer & Explanation
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4.2 Ratings (664 Votes)
Ans a the stem and leaf plot isStemandLeafDisplayStemunit1Statistics834SampleSize82843 3Mean9052561853Median904867 7 7StdDeviation2905202874
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