An electricity conservation NGO has published figures on the number of kilowatt-hours (kWh) used annually by various home appliances. It is claimed that a vacuum cleaner uses an average of 47 kWh per year. If a random sample of 39 homes included in a planned study indicates that vacuum cleaners used an average of 41 kWh per year with a standard deviation of 12.9 kWh, does this suggest that the 0.05 level of significance that vacuum cleaners use, on average, less than 45 kWh annually? Use the p-value approach. An electricity conservation NGO has published figures on the numberoff kilowatt-hours (kWh) used annually by various home appliances. It is claimedthat a vacuum cleaner uses an average of 47 kWh per year. If a random sampleoff 39 homes included in a planned study indicates that vacuum cleaners usedan average of 41 kWh per year with a standard deviation of 12.9 kWh, does.this suggest that the 0.05 level of significance that vacuum cleaners use, onaverage, less than 45 kWh annually? Use the p-value approach.

Question

Accepted Answer

Step 1: Givenn=39, xˉ=41kWh per year, s=12.9kWhμ=47kWh per year Step 2: Set up the hypotheses.Null…