The following are the dosage of medicine and blood AZT concentration levels of 32 healthy adult males
Dosage
2.5
2.5
2.5
2.5
2.5
1.9
2.1
1.9
1.9
0.9
1.5
1.4
1.4
1.5
1.8
1.8
2.0
1.8
0.9
0.6
0.9
1.3
1.1
1.4
1.1
0.8
0.7
1.0
1.1
0.8
1.0
0.9
concentration
832
672
904
554
996
878
815
805
592
391
710
591
660
694
668
601
77l
757
213
394
391
430
440
352
337
181
174
470
426
170
360
320
1. Describe the above variables using both numerical and graphical methods.
2. Make a stem and leaf display for each variable and use it to describe the each variable’s distribution.
3. Use z-scores to determine if the minimum and maximum values of the variable AZT concentration are outliers.
4. Make a scatter plot of the two variables. Use the scatter plot to describe the form of the relationship (if any) between the two variables.
5. Predict the AZT concentration level of a healthy adult male who received a medicine dosage = 2.2. How accurate is your prediction ?
6. Find the correlation coefficient between the dosage of medicine and blood AZT concentration level.
7. Construct the 95 % confidence interval for the mean of blood AZT concentration level.
8. Is there enough evidence at the a = 0.5 significance level that the mean of blood ZT is greater than 450?