Classify the hypothesis test as lower-tailed, upper-tailed, or two-sided. The manufacturer of a refrigerator system produces refrigerators that are supposed to maintain a true mean temperature, , of 48F, ideal for certain beverages. The owner of a beverage company does not agree with the refrigerator manufacturer, and will conduct a hypothesis test to determine whether the true mean temperature differs from this value.

Group of answer choices

Upper-tailed

Two-sided

Lower-tailed