A company claims that the mean monthly residential electricity consumption in a

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 62 residential customers has a mean monthly consumption of 930 kWh. Assume the population standard deviation is 125 kWh. A a-0 05, can you support the daim? Complete parts (a) through (e) (a) Identify Ho and Ha Choose the correct answer below. A. Ho = 890 (claim) OB. Ho H> 890 (claim) Ha-#890 O D. Hop 930 (claim) H, us930 Ha > 930 (claim) E. Ho $890 Ha #930 (claim) a H>890 (claim) (b) Find the crtical value(s) and identily the rejection region(s), Select the correct choice below and il in the answer box within your choice Use technobgy Round to two decimal places as needed) on The critical values are O B. The critical values dentily the rejection region(s) Select the correct choice below Click to select your answerts)

Explanation / Answer

(a) Ans : Option E.

(b) B. The critical value is 1.64.   

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