A national survey reports that the average number of screens (TVs, computers, tablets, and smartphones) in a single-family household 10.7, with a standard deviation of 1.5. You believe that average may be different in Hartsville. You collect a sample of 35 households in Hartsville, and find that the average number of screens is 10.55. Follow the outline to test the hypothesis at a significance level of ?=0.05: ?0:?=10.7??:?≠10.7 Identify the critical z-score for a significance level of ?=0.05 Calculate the standardized test statistic ?=?⎯⎯⎯−??/?√ Round your answer to 2 decimal places.

A national survey reports that the average number of screens (TVs, computers, tablets, and smartphones) in a single-family household 10.7, with a standard deviation of 1.5. You believe that average may be different in Hartsville. You collect a sample of 35 households in Hartsville, and find that the average number of screens is 10.55. Follow the outline to test the hypothesis at a significance level of ?=0.05: ?0:?=10.7??:?≠10.7 Identify the critical z-score for a significance level of ?=0.05 Calculate the standardized test statistic ?=?⎯⎯⎯−??/?√ Round your answer to 2 decimal places.

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Description: A national survey reports that the average number of screens (TVs, computers, tablets, and smartphones) in a single-family household 10.7, with a standard deviation of 1.5. You believe that average may be different in Hartsville. You collect a sample

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Follow the outline to test the hypothesis at a significance level of ?=0.05:

?0:?=10.7??:?≠10.7

Identify the critical z-score for a significance level of ?=0.05

Calculate the standardized test statistic ?=?⎯⎯⎯−??/?√

Round your answer to 2 decimal places.

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