Tammy conducted a survey to find the favorite subject of the students at her school. she asked 25 students from her math class what their favorite subject is. tammy concludes that math is the favorite subject of the students at her school because 60% of the students in her class like math. use at least two sentences to explain why tammy's sample may not be valid. make sure to use facts to support your answer.

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.