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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 α.05. b. Compute the estimated Cohen's dto measure the size of the treatment effect. c. Construct the 90% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds.

]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 α.05. b. Compute the estimated Cohen's dto measure the size of the treatment effect. c. Construct the 90% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 α.05. b. Compute the estimated Cohen's dto measure the size of the treatment effect. c. Construct the 90% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds.
Transcribed Image Text:]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 α.05. b. Compute the estimated Cohen's dto measure the size of the treatment effect. c. Construct the 90% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds.
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