How to test the hypothesis of no differences in the mean

Reference no: EM131404505

Stop, look, and listen. Where do you look when you are listening to someone speak? Researchers have discovered that listeners tend to gaze at the eyes or mouth of the speaker.

In a study published in Perception and Psychophysics (August 1998), subjects watched a videotape of a speaker giving a series of short monologues at a social gathering (e.g., a party). The level of background noise (multilingual voices and music) was varied during the listening sessions.

Each subject wore a pair of clear plastic goggles on which an infrared corneal detection system was mounted, enabling the researchers to monitor the subject's eye movements. One response variable of interest was the proportion y of times the subject's eyes fixated on the speaker's mouth.

(a) The researchers wanted to estimate E(y) for four different noise levels: none, low, medium, and high. Hypothesize a model that will allow the researchers to obtain these estimates

(b) Interpret the β's in the model, part a.

(c) Explain how to test the hypothesis of no differences in the mean proportions of mouth fixations for the four background noise levels.

Reference no: EM131404505

Questions Cloud

State the hypothesis in terms of the model parameters : Specify the parameters involved in a test of the hypothesis that no curvature exists in the response surface.- State the hypothesis of part a in terms of the model parameters.

Write down a firm optimization problem : The firm's problem Write down a firm's optimization problem. Be explicit about which variables the firm chooses and which variables it takes as given. Derive and interpret the first order necessary conditions of the firm

Compare the economies and monetary policies of two countries : Compare the economies and monetary policies of the two countries that you have researched. Make at least two recommendations as to primary manner in which both countries could improve their economy and / or monetary policies.

What about anisotropy in the finished product : Do you think it might be important to know whether a raw material to be used in a manufacturing process has anisotropic properties? What about anisotropy in the finished product? Explain.

How to test the hypothesis of no differences in the mean : Explain how to test the hypothesis of no differences in the mean proportions of mouth fixations for the four background noise levels.

Explain principles of internal control were violated in case : Indicate the three ways that Bret attempted to conceal the theft and the dollar amount involved in each method. What principles of internal control were violated in this case?

Locate the least squares prediction equation for y : MINITAB was used to fit the model to the data. Locate the least squares prediction equation for y on the printout shown below.

Estimate the diameter of a copper atom : The atomic weight of copper is 63.55, meaning that 6.023 × 1023 atoms weigh 63.55 g. The density of copper is 8970 kg/m3, and pure copper forms fcc crystals. Estimate the diameter of a copper atom.

Determine the size of the largest hole for the iron atoms : Show that, for the fcc unit cell, the radius r of the largest hole is given by r = 0.414R . Determine the size of the largest hole for the iron atoms in the fcc structure.

User Account

All Pages