1.A confidence interval is defined as ______________

a.An interval that has a 95% probability of containing the population parameter

b.A lower and upper confidence limit associated with a specific level of confidence

c.A point estimate plus or minus a specific level of confidence

d.An interval used to infer something about unknown sample statistic value

2.The correlation coefficient is used to determine __________.

a. A specific value of the y-variable given a specific value of the x-variable

b. The strength of the relationship between the x and y variables

c. A specific value of the y-variable given a specific value of the z-variable

d. A specific value of the x-variable given a specific value of the y-variable

3.Variables of which the values can be expressed numerically are called________.

a. continuous variables

b. quantitative variables

c. absolute variables

d. absolute variables

4.A formula or rule used for estimation the parameter is called ______

a. estimate

b. estimator

c. estimation

d. interval estimate

5.The branch of biostatistics that deals with testing of hypothesis, making prediction using data collected is called as________.

a. health care

b. inferential biostatistics

c. descriptive biostatistics

d. comparative biostatistics

6.Below is the definition of populationEXCEPT

a. collection of persons living in Florida who test positive for hepatitis C.

b. collection of deer that carry the tick responsible for Lyme disease.

c. set of person (objects) having a commonobservablecharacteristics.

d. type of media use in animal cell culture.

7.According to percentiles, median to be measured must lie in________.

a. 80^th

b. 40^th

c. 50^th

d. 100^th

8.You use regression method to analyze the relationship between the initial blood pressure of a patient (x) and the change in the blood pressure after treatment with a new drug (y). If you find a very strong positive association between these variables then________.

a. none of these are correct; this is a case of regression fallacy

b. there is an evidence that the higher the patients initial blood pressure, the bigger the impact of the new drug

c. there is an evidence that the higher the patients initial bloodpressure, the smaller the impact of the new drug

d. there is an evidence for an association of some kindbetween thepatients initial blood pressure and the impact of the new drug on the patients blood pressure

9.Any population which we want to study is referred as________.

a. target population

b. standard population

c. final population

d. target population

10.Types of estimation are ____________

a. Type I and type II

b. Point estimation and interval estimation

c. Biased and unbiased

d. One sided and two sided