(Single Best Answer) Question 91: An investigator wants to study the association between maternal intake of iron supplements (Yes or No) and birth weights (in gms) of newborn babies. He collects relevant data from 100 pregnant women and their newborns. What statistical test of hypothesis would you advise for the investigator in this situation ?
A) Chi-square test B) Unpaired or independent test C) Analysis of variance D) Paired t-test Answer (Select an option above to get the answer):
(Single Best Answer) Question 92: A drug company is developing a new pregnancy-test kit for use on an outpatient basis. The company used the pregnancy test on 100 women who are known to be pregnant. Out of 100 women, 99 showed positive test. Upon using the same test on 100 non-pregnant women, 90 showed negative result. What is the sensitivity of the test ?
A) 90% B) 99% C) Average of 90 & 99 D) Cannot be calculated from the given data Answer (Select an option above to get the answer):
(Single Best Answer) Question 93: Residents of three villages with three different types of water supply were asked to participate in a study to identify cholera carriers. Because several cholera deaths had occurred in the recent past , virtually everyone present at the time submitted to the examination. The proportion of residents in each village who were carriers was computed and compared. This study is a ?
A) Cross-sectional study B) Case-control study C) Concurrent cohort study D) Non-concurrent Answer (Select an option above to get the answer):
(Single Best Answer) Question 94: A screening test is used in the same way in two similar populations; but the proportion of false positive results among those who test positive in the population A is lower than those who test positive in population B. What is the likely explanation ?
A) The specificity of the test is lower in population A B) The prevalence of the disease is lower in population A C) The prevalence of the disease is higher in population A D) The specificity of the test is higher in population A Answer (Select an option above to get the answer):
A) Population under 10 years and 60 and above B) Population under 15 years and 60 and above C) Population under 10 years and 65 and above D) Population under 15 years and 65 and above Answer (Select an option above to get the answer):
A) Diarrheal diseases B) Birth injuries C) Low birth weight D) Congenital anomalies Answer (Select an option above to get the answer):
(Single Best Answer) Question 97: Excessive intake (hypervitaminosis) of which of the following vitamin is associated with increased risk of congenital malformations ?
A) Vitamin A B) Biotin C) Folic acid D) Vitamin K Answer (Select an option above to get the answer):
A) (No. of accidental pregnancies X 1200) / (No. of patients observed X months of use) B) (No. of accidental pregnancies X 1200) / (No. of patients observed X 2400) C) (No. of patients observed X months of use) / (No. of accidental pregnancies ) D) (No. of patients observed X 2400) / (No. of accidental pregnancies X 2400 ) Answer (Select an option above to get the answer):
(Single Best Answer) Question 99: An investigator wants to study the association between maternal intake of iron supplements (Yes or No) and incidence of low birth weight (<2500 or >= 2500 gms). He collects relevant data from 100 pregnant women as to the status of usage of iron supplements and the status of low birth weight in their newborns. The appropriate statistical test of hypothesis advised in this situation is ?
A) Paired t-test B) Unpaired or independent t-test C) Analysis of variance D) Chi-Square test Answer (Select an option above to get the answer):