compare three interventions for preterm infants, with regard to
effects on the infants’ heart rates: Nonnutritive Sucking (NNS),
Nonnutritive Sucking plus Rocking (NNSR), and Rocking (R). Nine
infants are randomly assigned to six different orderings of the
three treatments. Heart rate, the dependent variable, is measured
after each treatment. The data are summarized in the following
table.
(Click herefor the data set in Google Sheets)
|
NNS |
NNSR |
R |
|
145 |
144 |
168 |
|
148 |
151 |
157 |
|
171 |
176 |
191 |
|
132 |
135 |
140 |
|
165 |
170 |
183 |
|
152 |
155 |
170 |
|
143 |
149 |
152 |
|
160 |
171 |
188 |
|
138 |
143 |
152 |
Using a 1% level of significance, test the claim that interventions
do not influence infant heart rates (i.e. mean heart rates are
equal for all three interventions).
Results:
p-value =_____ (round answer to nearest hundredth of a percent –
2.35%)
Conclusion:
We ____ sufficient evidence to support the claim that intervention
type does influence infant heart rate (p_____ 0.01). (Use “have†or
“lack†for the first blank and “<†or “>†for the second
blank.)
