7. The following are null hypotheses except A. The average annual income of all the families of Barangay 512 is P36 000. B. There is no significant difference between the average life of Brand A light bulbs and that that of Brand B light bulbs. C. The proportion of Metro Manila college students who prefer the taste of the Gongcha is less than 2/3. D. The proportion of ABS CBN viewers who watch TV Patrol in IWant is the same as the proportion who watch TV Patrol in Facebook.

In March​ 2017, 9,195 men took trips with median duration of 300​ seconds, and​ 2,439 women took trips with median duration of 319​ seconds, on New York​ City's ride sharing​ program, Citibike.​ Overall, what was the median duration of all Citibike ride trips that​ month? A. 304 seconds   B. 315 seconds   C. 309.5 seconds   D. None of these.   E. Cannot be determined

For a study that has one independent variable with three levels and 4000 participants per level, what is the recommended maximum number of analyses (comparisons or contrasts) to plan? (hint: This is the same as the number of independent research questions that can be asked)   a. One, because this is the number of independent variables. b. Two, because this is one less than the number of groups. c. 11999, because this is one less than the number of participants. d. Any number...as long as the analysis is pre-registered there is nothing to worry about.

6. A social worker looks at data in her state regarding the relationship between being in foster care and having a criminal record by the age of 25. "Aging out' refers to when a youth turns 18 years old and is expected to move out of foster care and start their lives on their own. Fictional data fro 1350 youths is shown below. Answer the following questions in the space below, labeling each response a, b, or c. What percentage of youths overall were adopted before aging out, and had a criminal record?                           What percentage of youths were in foster care until they were aged out?                           True or False: If foster care status and having a crime record were independent of each other, and 55% overall had no crime record, you would expect 55% of those who aged out in foster care to have no crime record.       No crime record Crime record Total Foster care until ‘aged out’ 445 450 895 Adopted before aging out 300 155…