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Chapter 3: Q 3.10 (page 101)
We have provided simple data set for you to practices the basics of finding measures of center. For each data set determine the:
a) Mean
b)Median
c) Mode.
The given data set is
a) Mean
b) Median
c) Mode does not exist, because no value occurs more than once.
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Although, in practice, sample data are generally analyzed in inferential studies, what is ultimate objectives of such studies ?
Find the
a. Mean b. median c. models
For the mean and the median, round each answer to one more decimal place than that used for the observations.
Amphibian Embryos. In a study of the effects of radiation on amphibian embryos titled "Shedding Light on Ultraviolet Radiation and Amphibian Embryos" L. Licht recorded the time it took for a sample of seven different species of frogs' and toads' eggs to hatch. The following table shows the times to hatch, in days.
The data set has mean and standard deviation . Fill in the following blanks:
a. Approximately of the observations lie between_ and _
b. Approximately of the observations lie between_ and _
c. Approximately of the observations lie between _and _
A quantitative data set has mean and standard deviation . At least what percentage of the observations lie between and
Cuckoo Care. Many species of cuckoos are brood parasites. The females lay their eggs in the nests of smaller bird species, who then raise the young cuckoos at the expense of their own young. Data on the lengths, in millimeters (), of cuckoo eggs found in the nests of three bird species - the Tree Pipit. Hedge Sparrow, and Pied Wagtail - were collected by the late O.M. Latter in and used by L.H.C. Tippett in his text The Methods of States (New York Wiley, . p. ). Use the following boxplots to compare the lengths of cuckoo eggs found in nests of the three bird species, paying special attention to center and variation.
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