A research team is interested in the effect of the Parent Child Interaction Therapy (PCIT) in reducing children’s disruptive behaviors for children with disruptive behavior disorders (DBD). The research team recruited 12 families with child with DBD and interviewed the parents about the number of the disruptive behaviors the child has at home. After 3 weeks’ therapy, the research interviewed again about child’s disruptive behaviors. a)  What is the research question? b)  What is/are the variable(s)? Are they categorical or continual variable? c)  What statistical test can be used to answer the research question?

I have gotten this wrong twice and I don't know where I am going wrong. Please provide the detailed steps and formulas needed for me to complete this accurately. Thank you kindly.

A researcher is studying the relationship between sugar consumption and weight gain. Twelve volunteers were randomly assigned to one of two groups. The first group had five participants which were put on a diet low in sugar and the other group with the remaining seven participants received 10% of their calories from sugar. After 8 weeks, weight gain was recorded from each participant.  a) Explanatory variable:    (weight, 10% calories, Sugar consumption, weight gain) b) Response variable:    (weight gain, type of diet for severe participants, sugar consumption) c) Which of the following principles was not used in this study?                         A. Replication           B. Blinding                      C. Randomization                  D. Control d) This study is a(n)       (Survey, observational, experimental)     study. e) The ‘low sugar’ group can be thought of as a control group. The control group is being used in this experiment to avoid       (republication, confounding with…

A global research study found that the majority of​ today's working women would prefer a better​ work-life balance to an increased salary. One of the most important contributors to​ work-life balance identified by the survey was​ "flexibility," with 41​% of women saying that having a flexible work schedule is either very important or extremely important to their career success. Suppose you select a sample of 100 working women.  d.) If a sample of 400 is​ taken how does this change your answer to b?   The probability that in the sample between 37​% and 47​%say that having a flexible work schedule is either very important or extremely important to their career success is____.