Chapter 2: Q.15 (page 88)
Draw a smooth curve that represents a symmetric trimodal (three-peak) distribution.
Short Answer
From the given information,
Chapter 2: Q.15 (page 88)
Draw a smooth curve that represents a symmetric trimodal (three-peak) distribution.
From the given information,
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Get started for freeOf the variables you have studied so far, which type yields non numerical data ?
Process Capability. R. Morris and E. Watson studied various aspects of process capability in the paper "Determining Process Capability in a Chemical Batch Process" (Quality Engineering, Vol. , pp. 389-396). In one part of the study, the researchers compared the variability in product of a particular piece of equipment to a known analytic capability to decide whether product consistency could be improved. The following data were obtained for 10 batches of product.
Construct a stem-and-leaf diagram for these data with
a. one line per stem.
b. two lines per stem.
c. Which stem-and-leaf diagram do you find more useful? Why?
Discuss the relative advantages and disadvantages of stem-and leaf diagrams versus frequency histograms.
Forearm Length. In 1903, K. Pearson and A. Lee published the paper "On the Laws of Inheritance in Man. I. Inheritance of Physical Characters" (Biometrika, Vol. 2, pp. 357-462). The article examined and presented data on forearm length, in inches, for a sample of 140 men, which we present on the Weiss Stats site.
a. use the technology of your choice to identify the modality and symmetry (or non-symmetry) of the distribution of the data set.
b. if unimodal, classify the distribution as symmetric right-skewed. or left-skewed.
M&Ms. In the article "Sweetening Statistics-What M&M's Can Teach Us" (Minitab Inc., August 2008), M. Paret and E. Martz discussed several statistical analyses that they performed on bags of M&Ms. The authors took a random sample of small bags of peanut M&Ms and obtained the following weights, in grams (g). Construct a stem-and-leaf diagram for these weights.
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