Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305115347
Author: Roxy Peck; Chris Olsen; Jay L. Devore
Publisher: Brooks Cole
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Chapter 16.1, Problem 3E
a.
To determine
Test whether the data suggest a difference in the mean climbing times for the two gaits.
b.
To determine
Interpret the 95% confidence interval for the difference between the mean climbing times.
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A mail-order catalog firm would like to test the effect of the size of a magazine advertisement and the advertisement design on the number of catalog requests received (data in thousands). Three advertising designs and two different size advertisements were considered. The data obtained follow.
At the 0.05 level of significance,
a. Is there an interaction between type of design and size of advertisement?
b. Is there an effect due to type of design?
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]14. Many animals, including humans, tend
to avoid direct eye contact and even patterns
that look like eyes. Some insects, including
moths, have evolved eye-spot patterns on
their wings to help ward off predators.
Scaife (1976) reports a study examining how
eye-spot patterns affect the behaviour of
birds. In the study, the birds were tested in a
box with two chambers and were free to
move from one chamber to another. In one
chamber, two large eye-spots were painted
on one wall. The other chamber had plain
walls. The researcher recorded the amount
of time each bird spent in the plain chamber
during a 60-minute session. Suppose the
study produced a mean of M
34.5 minutes
on the plain chamber with SS = 210 for a
sample
of n =
15 birds. (Now: If the eye spots have
no effect. then the birds should spend an
average of u = 30 minutes in each chamber.)
a. Is this sample sufficient to conclude that
the eyes pots have a significant influence on
the bird's behaviour? Ike a two-tailed test
with…
5) Alcohol consumption is influenced by price and packaging, but what about
glassware? Atwood et al. (2012) measured whether the time taken to drink a beer
was influenced by the shape of the glass in which it was served. Participants were
given a 12 oz. of chilled lager and were told that they should drink it at their own
pace while watching a nature documentary. The participants were randomly
assigned to receive their beer in either a straight-sided glass or a curved, fluted glass.
The data below are the total time in minutes to drink the glass of beer by the 19
women participants in the study.
Straight glass: 11.63 10.37 17.89 6.96 20.40 20.64 9.26 18.11 10.33 23.54
Curved glass: 7.46 9.28 8.90 6.73 8.25 6.16 13.09 2.10 6.37
a. Show the data in a graph. What trend is suggested? Comment on other
differences between the frequency distributions of the two samples.
b. Test whether the mean total time to drink the beer differs depending on beer
glass shape.
Chapter 16 Solutions
Introduction to Statistics and Data Analysis
Ch. 16.1 - Urinary fluoride concentration (in parts per...Ch. 16.1 - Prob. 2ECh. 16.1 - Prob. 3ECh. 16.1 - A blood lead level of 70 mg/ml has been commonly...Ch. 16.1 - The effectiveness of antidepressants in treating...Ch. 16.1 - Prob. 6ECh. 16.1 - Prob. 7ECh. 16.2 - The effect of a restricted diet in the treatment...Ch. 16.2 - Peak force (N) on the hand was measured just prior...Ch. 16.2 - In an experiment to study the way in which...
Ch. 16.2 - Prob. 11ECh. 16.2 - Prob. 12ECh. 16.2 - Prob. 13ECh. 16.2 - Prob. 14ECh. 16.2 - Prob. 15ECh. 16.2 - Prob. 16ECh. 16.2 - Prob. 17ECh. 16.2 - The signed-rank test can be adapted for use in...Ch. 16.3 - Prob. 19ECh. 16.3 - Prob. 20ECh. 16.3 - The given data on phosphorus concentration in...Ch. 16.3 - Prob. 22ECh. 16.3 - Prob. 23ECh. 16.3 - The following data on amount of food consumed (g)...Ch. 16.3 - The article Effect of Storage Temperature on the...
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