A manufacturer of automatic washers provides a particular model in one of three colors. Of the first

Question:

A manufacturer of automatic washers provides a particular model in one of three colors. Of the first 1000 washers sold, it is noted that 400 were of the first color. Can you conclude that more than one-third of all customers have a preference for the first color?
a. Find the p-value for the test.
b. If you plan to conduct your test using α = .05, what will be your test conclusions?