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 68 residential customers has a mean monthly consumption of 920 kWh. Assume the population standard deviation is 120 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. a- OA. Ho: >890 (claim) Ha: μ≤890 OC. Ho: μ≤920 Ha: μ> 920 (claim) O E. Ho: μ = 920 Ha: μ#920 (claim) O B. Ho: μ≤ 890 Ha: μ> 890 (claim) O D. Ho: μ=890 (claim) Ha: μ#890 OF. Ho: μ> 920 (claim) H₂:μ≤920

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
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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 68 residential customers has a
mean monthly consumption of 920 kWh. Assume the population standard deviation is 120 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.
a-
OA. Ho: >890 (claim)
Ha: μ≤890
OC. Ho: μ≤920
Ha: μ> 920 (claim)
O E. Ho: μ = 920
Ha: μ#920 (claim)
O B. Ho: μ≤ 890
Ha: μ> 890 (claim)
O D. Ho: μ=890 (claim)
Ha: μ#890
OF. Ho: μ> 920 (claim)
H₂:μ≤920
Transcribed Image Text: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 68 residential customers has a mean monthly consumption of 920 kWh. Assume the population standard deviation is 120 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. a- OA. Ho: >890 (claim) Ha: μ≤890 OC. Ho: μ≤920 Ha: μ> 920 (claim) O E. Ho: μ = 920 Ha: μ#920 (claim) O B. Ho: μ≤ 890 Ha: μ> 890 (claim) O D. Ho: μ=890 (claim) Ha: μ#890 OF. Ho: μ> 920 (claim) H₂:μ≤920
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Follow-up Question
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 68 residential customers has a
mean monthly consumption of 920 kWh. Assume the population standard deviation is 120 kWh. At a = 0.01, can you
support the claim? Complete parts (a) through (e).
OC. Ho: μ≤920
Ha: μ> 920 (claim)
O E. Ho: μ = 920
Ha: μ#920 (claim)
(Round to two decimal places as needed.)
O A. The critical value is
O D. Ho: μ=890 (claim)
Ha: μ#890
(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.
B. The critical values are +
OF. Ho: μ> 920 (claim)
Ha: μ≤920
Transcribed Image Text: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 68 residential customers has a mean monthly consumption of 920 kWh. Assume the population standard deviation is 120 kWh. At a = 0.01, can you support the claim? Complete parts (a) through (e). OC. Ho: μ≤920 Ha: μ> 920 (claim) O E. Ho: μ = 920 Ha: μ#920 (claim) (Round to two decimal places as needed.) O A. The critical value is O D. Ho: μ=890 (claim) Ha: μ#890 (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. B. The critical values are + OF. Ho: μ> 920 (claim) Ha: μ≤920
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