The weight of a product is measured in pounds. A sample of 50 units is taken from a recent production. The sample yielded x¯¯¯ = 75 lb, and we know that σ2 = 100 lb. Calculate a 90 percent confidence interval for μ.

Did the universe cool off or get hotter as it expanded after the 'big bang"?

The and the gall bladder work together to produce, store, and use bile to digest a) liver; fats b) stomach; fats c) appendix; food. d) pancreas; sugars

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.