7- Suppose the cutoff Z scores are +2.37. You could reject the null hypothesis if the sample's score gets transformed into a Z score of; A) -1.50 B) 2.10 C) -1.85 D) 3.58 8) A researcher is interested in a new kind of treat for dogs. This new treat is good for dental hygiene and is low cost and easily accessible. The researcher is interested in whether this new treat will help dogs maintain better dental hygiene than previous dental hygiene treats for dogs. What is the null hypothesis? A) The dogs will not like the new treat B) The new treat is better than the old dental hygiene products C) The new treat will not help dental hygiene D) The new treat will not help dogs maintain better dental hygiene than previous products