Question
In: Statistics and Probability
) A researcher was interested in knowing if preterm infants with late metabolic acidosis and preterm...
) A researcher was interested in knowing if preterm infants with late metabolic acidosis and preterm infants without the condition differ with respect to urine levels of a certain chemical. Assume that the urine levels of two groups are normally distributed with same variations. The sample sizes, mean levels, and standard deviations for the two samples taken were as follows:
(a) Conduct an appropriate test, what should the researcher conclude on the significance level α = 0.05?
(b)Without further computation, does the 95% confidence interval contain zero for the mean difference of the two groups? Why or why not?
Sample size Mean Standard deviations
With condition : 38, 8.5 ,5.6
Without condition :38, 4.8, 4.6
Difference: 38 ,3.7 ,5.2
Solutions
orchestra answered 2 years agoRelated Solutions
We wish to compare three interventions for preterm infants, with regard to effects on the infants’...
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
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144
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