Of the 640 infants in the study, only 98 had a diagnosed peanut allergy at the beginning of the study. Explain why you think the researchers decided to split the infants into two groups before randomly assigning them to the conditions.

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?