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The following data represents the number of automobiles arriving at a toll booth during 20 intervals, each of ten-minute duration. Compute the mean, median, mode, first quartile, and third quartile for data... (please see attachment for remainder of questions)

Solution Summary

Ex. 11

The following data represents the number of automobiles arriving at a toll booth during 20 intervals, each of ten-minute duration. Compute the mean, median, mode, first quartile, and third quartile for data.

26 26 58 24 22 22 15 33 19 27
21 18 16 20 34 24 27 30 31 33

Ex 13

A sample of 15 college seniors showed the following credit hours taken during the final term of their senior year:

15 21 18 16 18 21 19 15 14 18 17 20 18 15 16

a. What are the mean, median, and mode fro credit hours taken? Compute and interpret.
b. Compute the first and third quartiles.
c. Compute and interpret the 70th percentile

Ex 19

PC World provides ratings for the top 15 notebook PCs. A 100-point scale was used to provide an overall rating for each notebook tested in the study. A score in the 90's is exceptional, while one in the 70s is above average. The overall ratings for the 15 notebooks that were tested are shown here.

Notebook Overall Rating

Ams Tech Roadster 15CTA 380 67
Compaq Prosignia Notebook 150 79
Dell Inspiron 3700C466GT 80
Dell Insprion 7500 R500VT 84
Dell Latitude Cpi A366XT 76
Enpower ENP-313 Pro 77
Gateway Solo 9300LS 92
HP Pavillion Notebook PC 83
IBM Think Pad Series 1480 78
Micro Express NP7400 77
Micro Transport NX PII-400 78
NIC Versa SX 78
Sceptre Soundx 5200 73
Sony VAIO PCG-F340 77

Compute the range, interquartile range, variance, and standard deviation.

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