Formative questions week 4
1. Given: A randomized controlled trial involving 72 persons, who either are randomly
allocated to the diet condition or to the control condition. Examined is whether there is an
effect of diet (0 = no diet; 1 = diet) on having a high blood pressure (0=no; 1 = yes). The
following SPSS output is obtained:
Question:What percentage of all persons that were on the diet have a high blood pressure?
a) 14/36 x 100 %
b) 22/36 x 100 %
c) 14/42 x 100 %
d) 28/42 x 100 %
2. Given: See problem 1. The null hypothesis is that the probability of high blood pressure is
the same for the diet as for the non-diet group. Question: If the null hypothesis is true,
what is the expected number of persons that is on diet and has a high blood pressure?
a) 36/72 x 42/72
b) 36/42 x 72
c) 36/72 x 42/72 x 72
1. Given: A randomized controlled trial involving 72 persons, who either are randomly
allocated to the diet condition or to the control condition. Examined is whether there is an
effect of diet (0 = no diet; 1 = diet) on having a high blood pressure (0=no; 1 = yes). The
following SPSS output is obtained:
Question:What percentage of all persons that were on the diet have a high blood pressure?
a) 14/36 x 100 %
b) 22/36 x 100 %
c) 14/42 x 100 %
d) 28/42 x 100 %
2. Given: See problem 1. The null hypothesis is that the probability of high blood pressure is
the same for the diet as for the non-diet group. Question: If the null hypothesis is true,
what is the expected number of persons that is on diet and has a high blood pressure?
a) 36/72 x 42/72
b) 36/42 x 72
c) 36/72 x 42/72 x 72
