Question

There are two techniques for determining diastolic blood pressure: the standard method used by medical personnel and a digital method which uses an electronic device with a digital readout.  The diastolic blood pressure is measured using both methods for the same 45 patients.  Is there a significant difference in the mean diastolic blood pressure using the two methods?

(a) Is the data categorical or quantitative?

(b)   How many groups/samples of data were collected?  (For example,   if there is a sample for men and a sample for women,   that would be two groups or samples of data)

(c) If the data is  categorical, then how many possible answers are there? If the data is  quantitative, then can it be matched?  If so, for the same what?

(d)  How can I visualize the data (what is the appropriate way to graph the data)?
(e)   What type of test would you do?     (Choose from:  one proportion,  two proportions,  chi-square goodness of fit,  chi-square test for independence,  one mean,  paired means,  independent means,  ANOVA with independent samples,   ANOVA with blocked samples  )
(f)   Write the null and alternative hypotheses.  (Do not perform the test)

Answer 1

(A) The data is of quantitative in nature.

(B) two groups of data with 45 samples in each group are collected.

(C) For both cases two groups of data are sampled.

(D) The best way to visualize the data is multiple bar diagram, where it readily visualizes data for both method side by side.

(E) We use paired mean test as there are the same sampling units on which two repeated measures are taken.

(F) Null Hypothesis: There is no significant differences between the measurement of two methods

Alternative Hypothesis: There is significant difference between the two methods of blood pressure reading.