A company claims that the mean monthly residential electricity consumption in a certain region is more than 880 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 67 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 130 kWh. At α=0.05, can you support the claim? Identify H0 and Ha. Find the critical value(s) and identify the rejection region(s). Identify the rejection region(s) Find the standardized test statistic Decide whether to reject or fail to reject the null hypothesis.

A company claims that the mean monthly residential electricity consumption in a certain region is more than 880 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 67 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 130 kWh. At α=0.05, can you support the claim? Identify H0 and Ha. Find the critical value(s) and identify the rejection region(s). Identify the rejection region(s) Find the standardized test statistic Decide whether to reject or fail to reject the null hypothesis.

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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Question

A company claims that the mean monthly residential electricity consumption in a certain region is more than

880 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 67 residential customers has a mean monthly consumption of

900 kWh. Assume the population standard deviation is

130 kWh. At α=0.05,

can you support the claim?

Identify H0 and Ha.

Find the critical value(s) and identify the rejection region(s).

Identify the rejection region(s)

Find the standardized test statistic

Decide whether to reject or fail to reject the null hypothesis.

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