For each exercise, perform these steps. Assume that all variables are normally or approximately normally distributed. a.
Question:
For each exercise, perform these steps. Assume that all variables are normally or approximately normally distributed.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.
Use the traditional method of hypothesis testing unless otherwise specified.
In 2010, 91% of households had at least one cell phone. A random sample of 300 households in each of two different counties indicated the following. At the 0.01 level of significance, can it be concluded that a difference in proportions exists?
Transcribed Image Text:
County X County Y n 300 300 X 255 278
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Solution a The hypotheses is called a null hypothesis and the conclusion is called a test for s...View the full answer
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Related Book For
Elementary Statistics A Step By Step Approach
ISBN: 9780077665807
9th Edition
Authors: Allan G. Bluman
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