Question

# Researchers hypothesize that a new oral contraceptive will produce weight gain. In a study, healthy females...

Researchers hypothesize that a new oral contraceptive will produce weight gain. In a study, healthy females were weighed (lb) at the beginning of a course of the new oral contraceptive. They were reweighed at 3 months. What can the researchers conclude with an α of 0.01? The data are below.

initial weight 3-month weight
140
117
137
130
140
158
147
145
141
140
150
119
144
141
144
163
146
145
151
144

a) What is the appropriate test statistic?
---Select--- na z-test ,One-Sample t-test, Independent-Samples t-test ,Related-Samples t-test

b)
Condition 1:
---Select--- beginning new oral contraceptive weight 3 months healthy females
Condition 2:
---Select--- beginning new oral contraceptive weight 3 months healthy females

c) Compute the appropriate test statistic(s) to make a decision about H0.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
critical value =  ; test statistic =
Decision:  ---Select--- Reject H0 Fail to reject H0

d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[  ,  ]

e) Compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
d =  ;   ---Select--- na trivial effect small effect medium effect large effect
r2 =  ;   ---Select--- na trivial effect small effect medium effect large effect

f) Make an interpretation based on the results.

A. There was a significant weight decreases in women using the new oral contraceptive.B. There was a significant weight increase in women using the new oral contraceptive. C.There was no significant weight change in women using the new oral contraceptive.