For each of the following sinations, determine hether a one-or a two-diled en appropriate. Also, state the research and the null hypotheses.

You are interested in Finding oaf average nonsenot. concome of reidons..

You if liferent from the national average household According to the US. Com for 2017, the national average household incorne is $57,652.1

You believe that students in small liberal arts colleges attend more parties per noms. than students nationwide. It is known that nationally undergraduate students atom an average of 3.2 parties per month. The average number of parties per month wil be calculated from a random sample of students from small liberal arts colleges,

A sociologist believes that the average income of elderly women is lower than the average income of elderly men.

Is there a difference in the amount of study time on-campus and off-campus students devote to their schoolwork during an average week? You prepare a survey to determine the average number of study hours for each group of students.

Reading scores for a group of third graders enrolled in an accelerated reading program are predicted to be higher than the scores for nonenrolled third graders.

Stress (measured on an ordinal scale) is predicted be lower for adults who own dogs (or other pets) than for non-pet owners.