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A) The attached file contains data on the breadth (in millimeters) of 243 cuckoo eggs....

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beans1 | eNoter

Posted May 22, 2013 at 7:44 PM via web

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A) The attached file contains data on the breadth (in millimeters) of 243 cuckoo eggs. These data are grouped. What first interval starting value and interval width would you need to use to obtain a frequency diagram of these data that uses the same grouping as in the file?


B)Suggest one reason, with a brief explanation, why a normal distribution model might not be suitable for the variation in the data.

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embizze | High School Teacher | (Level 1) Educator Emeritus

Posted May 22, 2013 at 8:45 PM (Answer #1)

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Class               Interval               Frequency
--------------------------------------------
14        `13.75<=x<14.25`            1

14.5     `14.25 <= x < 14.75`             1

15        `14.75<=x<15.25`             5

15.5     `15.25<=x<15.75`             9

etc...

The initial interval value should be 13.75 with a interval width of .5

(b) The data appears to be left-skewed or left-tailed. (The graph shows a "hump" towards the right.) It appears from the data if an egg is different from the mean, that it is more likely to be smaller.

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