Solve the Problem. -In One Region, the September Energy Consumption Levels for Single-Family

question 80

Multiple Choice

Solve the problem.
-In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. If 50 different homes are randomly selected, find the probability that their mean energy consumption level for September is greater than 1075 kWh.

• A)0.2090
• B)0.0438
• C)0.2910
• D)0.4562

---

Definitions:

Null Hypothesis

A hypothesis in statistical analysis stating that there is no effect or no difference, and it serves as the assumption to be tested.

Independent Samples

Two or more groups of data that are not related or influenced by the same variables.

Critical Value

The threshold value that the test statistic must exceed in order for the null hypothesis to be rejected in hypothesis testing.

F-Table

A table used in statistics that displays the critical values of the F-distribution, which is utilized in analysis of variance (ANOVA) and other tests that compare variances.