Chapter 8: Q 8.33 (page 330)
What is meant by saying that a statistical procedure is robust?
It means that procedure is working reasonably well.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
For the one-mean interval procedure, express the formula for the endpoints of a confidence interval in the form.
Smelling Out the Enemy. Snakes deposit chemical trails as they travel through their habitats. These trails are often detected and recognized by lizards, which are potential prey. The ability to recognize their predators via tongue flicks can often mean life or death for lizards. Scientists from the University of Antwerp were interested in quantifying the responses of juveniles of the common lizard to natural predator cues to determine whether the behavior is learned or congenital. Seventeen juvenile common lizards were exposed to the chemical cues of the viper snake. Their responses, in number of tongue flicks per twenty minutes, are presented in the following
Find and interpret a confidence interval for the mean number of tongue flicks per minutes for all juvenile common lizards. Assume a population standard deviation of .
Big Bucks. In the article "The Club" (The Business Journal, Vol. 24, Issue 14, Pp. 80-82), J. Trunelle et al. examined Arizona public-company executives with salaries and bonuses totaling over The following data provide the salaries, to the nearest thousand dollars, of a random sample of such executives. 
Digital Viewing Times. Refer to Exercise
a. Find and interpret a lower confidence bound for last year's mean time spent per day with digital media by American adults.
b. Compare your one-sided confidence interval in part (a) to the (two-sided) confidence interval found in Exercise .
Green Sea Urchins. From the paper "Effects of Chronic Nitrate Exposure on Gonad Growth in Green Sea Urchin Strongylocen. trouts drocbachiensis" (A quaculture, Vol. 242, No. 1-4, pp. 357-363) by Siikavuopio et al., the weights, of adult green sea urchins are normally distributed with mean and standard deviation For samples of such weights, identify the distribution of each of the following variables.
a.
b.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
