Pandemic electricity - According to data from the United States Department of Energy, the mean amount a residential customer in the US paid for electricity in the year 2019 was $1360. Because people spent so much more time in their homes during 2020 due to the pandemic, you wonder if the mean amount Michigan residential customers paid for electricity during 2020 i higher than the national value from 2019. You obtain a random sample of 47 Michigan residential customers and record the amount they paid for electricity for 2020. You calculate a mean of $1491 and a standard deviation of S629.37. Round all calculated values to 4 decimal places as appropriate 1. Which test should you use to answer your research question?
A. X^2 goodness of fit test
B. t test for sample mean
C. ztest of independence
D. Z test for one population proportion