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# The content of the solution given to 3 day old infants was changed over cxonsecutive periods: (1) water, (2) water, (3)0.1 molar salt + water, (4)...

The content of the solution given to 3 day old infants was changed over cxonsecutive periods: (1) water, (2) water, (3)0.1 molar salt + water, (4) 0.1 molar salt + water, (5) water, (6) water, (7) 0.3 molar salt + water, (8) 0.3 molar salt + water, (9)water, (10) water. In addition, as a control, the response of the baby to the taste of sugar was also measured after the salt-taste protocol was completed. In an experiment, the sucking response was measured over five different periods with the following stimuli: (1) non nutritive sucking, that is a pure sucking response was elicited without using any external substance; (2) water; (3) 5% sucrose + water ; (4) 15% sucrose + water;(5) nonnutritive sucking.
Construct a variable measuring the response to salt. For example, one possibility is to compute the average MSB for trials 3 and 4- average MSB for trials 1 and 2 = average when the solution was 0.1 molar salt + water - average MSB when the solution was water. A similar index could be computed comparing trials 7 and 8 with trials 5 and 6. (MSB-mean number of sucks per burst of sucking).

6.56 Obtain descriptive statistics and graphic displays for these salt-tatste indices. Do the indices appear to be normally distributed? Why or why not ?Compute the sample mean for this index, and obtain 95 % Cls about the point estimate.

6.57 Construct indices measuring responsiveness to sugar tatse, and provide descriptive statistics and graphical displays for these indices. Do the indices appear normally distributed ? Why or why not ? Compute the sample mean and associated 95 % Cls for these indices.

6.58 We want to relate the indices to blood pressure level. Provide a scatter plot relating mean SBP and mean DBP, respectively, to each of the salt-taste and sugar-taste indices. Does there appear to be a relation between the indices and blood pressure level?

Sol: (6.56) the two indices are all symmetric about their means but have many
values located around the men to be considered normally distributed. This is most
likely due to there not being a...

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