Question: Data is collected at the same time each day of voltage readings from a meter connected to the system and analysis of variance was used with the readings obtained on the three different types of day: sunny- cloudy and rainy . The TI-83/84 Plus calculator results are below.

a. Use a 0.05 significance level to test the claim that the mean voltage reading is the same for the three different types of day.

b. Is there significant evidence to support the claim of different population means?

c. We might expect that a solar system would provide more electrical energy on sunny days than on cloudy or rainy days. Can we conclude that sunny days result in greater amounts of electrical energy.

TI-83/84 Plus