Stereograms test In Exercise 50, Chapter 4, we looked at data from an experiment to determine whether visual information about an image helped

“see” the image in 3D.

2-Sample t-Interval for m1 - m2 Conf level = 90% df = 70 m(NV) - m(VV) interval: (0.55, 5.47)

a) Interpret your interval in context.

b) Does it appear that viewing a picture of the image helps people “see” the 3D image in a stereogram?

c) What’s the margin of error for this interval?

d) Explain carefully what the 90% confidence level means.

e) Would you expect a 99% confidence interval to be wider or narrower? Explain.

f) Might that change your conclusion in part b?

Explain.