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Chapter 3: Q. 18 (page 151)

Fossil Argonauts. In the article "Fossil Argonauts (Mollusca: Cephalopoda: Octopodida) from Late Miocene Slitstones of the Los Angeles Basin, California" paleontologists L. Saul and C. Stadium discussed fossilized Argonaut cgg cases from the late Miocene period found in California. A sample of 10fossilized egg cases yielded the following data on height, in millimeters. Obtain the mean. median. and mode(s) of these data.

Short Answer

Expert verified

The mean, mode and median of given sample are 30.53,33,32.5 respectively

Step by step solution

01

Given information

We are given sample of fossilized egg we have to find mean,median , mode of these data.

02

Simplify

Given data is 37.5,31.5,27.4,21.0,32.0,33.0,33.0,38.0,17.4,34.5

Mean x=∑xii=10n

where, n=Total number of data in Sample

x=37.5+31.5+27.4+21+32+33+33+38+17.4+34.510x=30.53

Mode - Highest occuring data in sample.

Mode =33.0

Median is middle data when arranged in ascending order.

Given data in ascending order will be

17.4,21,27.4,31.5,32,33,33,34.5,37.5,38

Here, we can see 32and 33are middle value. So we have to take average value.

Median =32+332=32.5

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Most popular questions from this chapter

For you to practice finding the descriptive measures mentioned in this part, we have provided simple data sets. Each data set separately.

a) Calculate the quartiles

b) calculate the interquartile range

c)recognize the five-number summary

1,2,3,4,5,6,7

Although, in practice, sample data are generally analyzed in inferential studies, what is ultimate objectives of such studies ?

A quantitative data set has size 60. At least how many observations lie within three standard deviation to either side of the mean ?

In Exercises 3.201-3.206, we have provided simple data sets for you to practice the basics of finding a

a. population mean

b. population standard deviation

3.2054,2,0,2,2

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