BIOSTATISTICS FINAL EXAM MULTIPLE CHOICE QUESTIONS WITTH CORRECT ANSWERS

BIOSTATISTICS FINAL EXAM MULTIPLE CHOICE QUESTIONS WITTH CORRECT ANSWERS A study was conducted in America to find out the proportion of blacks and white Americans in California. This variable chosen is .1 a. Nominal b. Ordinal c. Continuous d. Discreet numerical e. Dichoto mousKey: True: e The median of the following data, is: 1,2,4,6,8,10,11,13 .2 a. 6 b.8 c.7 d.10 e. 9 Key: True: c A household survey of 10 families was conducted by students of 4th year MBBS. In the collected data, the ages of heads of families .3 were: 32, 34, 35, 36, 36, 42, 44, 46, 48, and 52. The mean age of heads of families is a. 36 b. 38.5 c. 40 d. 40.5 e. 42 Key: True: d A nutritional research team followed serum levels of vitamin B12 in 120 children for three years to determine the association .4 :between cyanocobalamin deficiency and the subsequent risk of developing Megaloblastic anemia. The results were as follows VITAMIN B12 LEVELS Mean 260 pg/mL Median 226 pg/mL Mode 194 pg/mL :From the data, it can be concluded that this distribution is a. Normal b. Negatively c. Positively skewed d. Bimodal e. Multim odalKey: True: c Serum cholesterol levels for two groups of Americans were recorded in 1989. The mean cholesterol levels of the two groups were .5 :compared. To determine whether the measurements were significantly different or not, the most appropriate statistical test would be a. Chi-square test b. Correlation analysis(c. F lOMoARcPSD| test (ANOVA d. Student’s t test e. Regression analysisKey: True: d :In a descriptive study the mean is 220 and the standard error is 10, the 95 confidence limits would be .6 a. 210 to 230 b. 215 to 225 c. 200 to 240 d. 220 to 230 e. 205 to 235Key: True: c :For a survey, a village is divided into 5 lanes, each lane is sampled randomly. It is an example of .7 a. Simple random sampling b. Standard random sampling c. Systematic random sampling d. Cluster random sampling e. Quasi random samplingKey: True: d :The birth weights in a hospital are to be presented in a graph. This is best done by a .8 lOMoARcPSD| a. Bar diagram b. Pie chart c. Histogram d. Pictogram e. Frequency chartKey: True: c An analysis of the race of patients who visit an emergency room reveals that 40% are white, 25% are black, 20% are Native .9 American, and 15% are Asian. These data would best be depicted graphically with a a. Venn diagram b. Cumulative frequency graph c. Normal curve d. Histogram e. Pie chart Key: True: e If six families were surveyed and the numbers of children per family were found to be 2, 3, 4, 4, 5, 6, fine the mean number of .10 children per family a. 2 b. 3.5 c. 4 d. 6 e. 4.5 Key: True: c If, in one of the groups of premature infants, the maximum value for hexosaminidase A was substituted with a much higher value. .11 :The value which is unlikely to be affected by this higher value isaVariance a. Range a. Standard deviation b. Median c. Mean Key: True: d