# Biostatistics Problems

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I am not sure what to do and these are very hard. Please help me as I can use this as an tutorial. Attached is also the data information

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

6.57 Construct indices measuring responsiveness to sugar taste, 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% CIs 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?

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##### Solution Summary

The expert constructs the indices measuring responsiveness to sugar taste.

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

After organizing the data for salt taste indices, we could run "descriptive statistics" under "data analysis" in excel and obtain the following output:

Column1

Mean -2.7623

Standard Error 0.737648

Median -2.5

Mode 0

Standard Deviation 7.376478

Sample Variance 54.41243

Kurtosis 1.815535

Skewness 0.034726

Range 48

Minimum -22.75

Maximum 25.25

Sum -276.23

Count 100

For the data set, we could arrange them into 10 classes into the following ...

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