Question

We wish to 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
148	151	157
175	180	202
145	144	168
171	176	191
165	170	183
143	149	152
152	155	170
132	135	140
150	148	161

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

Answer 1

Groups	Count	Sum	Average	Variance
NNS	9	1378	153.1111	203.8611
NNSR	9	1408	156.4444	236.7778
R	9	1524	169.3333	388.5

One Way ANOVA:

(Atleast one is not equal)

Significant value= 0.01

The test statistic:

P-value= 0.11308

The test statistic is not significant and fail to reject H0. There is sufficient evidence to support the claim that the claim that interventions do not influence infant heart rates.