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Recognizing rotating objects. Perception and Psychophysics (July 1998) reported on a study of how people view the three-dimensional objects projected onto a rotating two-dimensional image. Each in a sample of 25 university students viewed various depth-rotated objects (e.g., hairbrush, duck, shoe) until they recognized the object. The recognition exposure time-that is, the minimum time (in milliseconds) required for the subject to recognize the object-was recorded for each.
In addition, each subject rated the ‘‘goodness of view'' of the object on a numerical scale, where lower scale values correspond to better views. The next table gives the correlation coefficient, r, between recognition exposure time and goodness of view for several different rotated objects,
(a) Interpret the value of r for each object.
(b) Calculate and interpret the value of r2 for each object.
(c) The table also includes the t-value for testing the null hypothesis of no correlation (i.e., for testing H0 : β1 = 0). Interpret these results.
Develop the "best" regression model possible using this set of variables to help you predict the Risk. State your final model. Interpret the coefficients for the model (i.e. what do the numbers mean?).
The 30N uniform rectangular plate is supported by a pin at A and cable BC attached at corner B. A 65N weight hangs from corner D .a) Find the tension in the cable. b) Find the force exerted on the plate by the pin at A.
Generate the statistical null and alternative hypotheses. Describe what information the effect size would tell you that the probability value would not tell you.
Find the probability distribution of the value x . mean variance and standard derivation.
A researcher, for reasons passing understanding, wishes to assess the association between gender and total cholesterol values. What would be the appropriate statistical procedure
during the period of time that a local university takes phone-in registrations calls come in at the rate of one every
question a random sample of 250 juniors majoring in psychology or communications at a large university is selected.
Standard deviation is $0.10. At α = 0.01, is there significant difference in price? Determine the 99% confidence interval of the difference in the means.
If you randomly assign participants to groups, can you suppose the groups are equivalent at the beginning of the study?
work out the mean, standard deviation and coefficient of variation for each set of results. comment on the accuracy and precision of your results
Prove that the set of open disks in the xy plane with center (x,x) and radius x > 0, x rational, is a countable covering of the set {(x,y): x > 0, y > 0}
Construct a frequency histogram for the interarrival times. Is the data skewed to the right? Give your opinion on whether the phishing attack against the organization was an ‘‘inside job.''
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