Braden wants to compare the types of ducks in two nearby ponds. he collected two samples using the following criteria. for sample 1, he counted the types of ducks on walden pond from 6 a. m. to 9 a. m. for sample 2, he counted the number of mallard ducks that were on brook’s pond from 12 p. m. to 3 p. m. what would improve braden’s plan? check all that apply.

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.