A company claims that the mean monthly residential electricity consumption in a certain region is more than 890 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 61 residential customers has a mean monthly consumption of 920 kWh. Assume the population standard deviation is 127 kWh. At a = 0.01, can you support the claim? Complete parts (a) through (e). (a) Identify Ho and H₂. Choose the correct answer below. OA. Ho: H=890 (claim) H₂:μ*890 OC. Ho: >890 (claim) H₂:μ≤890 OE. Ho: 920 H₂:μ#920 (claim) OB. Ho: 5920 OD. Ho: >920 (claim) H₂HS920 Ha: > 920 (claim) OF. Ho: 5890 (Round to two decimal places as needed.) OA. The critical values are t OB. The critical value is Identify the rejection region(s). Select the correct choice below. At the 1% significance level, there electricity consumption in a certain region (b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in the answer box within your choice. Use technology. OA. The rejection region is z <2.33. OB. The rejection regions are z< -2.33 and z>2.33. OC. The rejection region is z>2.33. (c) Find the standardized test statistic. Use technology. The standardized test statistic is z = (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. H₂:μ> 890 (claim) OA. Fail to reject Ho because the standardized test statistic is not in the rejection region. OB. Reject H, because the standardized test statistic is not in the rejection region. OC. Reject H, because the standardized test statistic is in the rejection region. OD. Fail to reject H, because the standardized test statistic is in the rejection region. (e) Interpret the decision in the context of the original claim. enough evidence to kWh. the claim that the mean monthly residential
A company claims that the mean monthly residential electricity consumption in a certain region is more than 890 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 61 residential customers has a mean monthly consumption of 920 kWh. Assume the population standard deviation is 127 kWh. At a = 0.01, can you support the claim? Complete parts (a) through (e). (a) Identify Ho and H₂. Choose the correct answer below. OA. Ho: H=890 (claim) H₂:μ*890 OC. Ho: >890 (claim) H₂:μ≤890 OE. Ho: 920 H₂:μ#920 (claim) OB. Ho: 5920 OD. Ho: >920 (claim) H₂HS920 Ha: > 920 (claim) OF. Ho: 5890 (Round to two decimal places as needed.) OA. The critical values are t OB. The critical value is Identify the rejection region(s). Select the correct choice below. At the 1% significance level, there electricity consumption in a certain region (b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in the answer box within your choice. Use technology. OA. The rejection region is z <2.33. OB. The rejection regions are z< -2.33 and z>2.33. OC. The rejection region is z>2.33. (c) Find the standardized test statistic. Use technology. The standardized test statistic is z = (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. H₂:μ> 890 (claim) OA. Fail to reject Ho because the standardized test statistic is not in the rejection region. OB. Reject H, because the standardized test statistic is not in the rejection region. OC. Reject H, because the standardized test statistic is in the rejection region. OD. Fail to reject H, because the standardized test statistic is in the rejection region. (e) Interpret the decision in the context of the original claim. enough evidence to kWh. the claim that the mean monthly residential
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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