Exam Name the one alternative that best completes the statement or answers the q

Question

Exam Name the one alternative that best completes the statement or answers the question. MULTIPLE CHOICE Choose Provide an appropriate response. 1) The United States can be divided into four geographical regions: Northeast, South, Midwest, 1 consists of 9 states; the South region consists of 16 states; the Midwest consists of 12 states; and the West consists of 13 states. If a administered to the governors states in each of the four regions, how many states from the South should be selected? Ro to the nearest whole state. survey is to be of 10 of the states and we want equal representation for the und A) 4 2) 2) What will help insure that the effect of a treatment is not due to some characteristic of a single experimental unit? C) blocking D) replication A) blinding B) randomizing 3) 3)Grade points are assigned as follows: A =4,B-3,Cz2,D-1, and F-0. Grades are weighted according to credit hours. If a student receives an A in a four-credit class, a D in a two-credit class, a B in a three-credit class and a C in a three-credit class, what is the student's grade point average? A) 1.75 B) 2.75 C) 3.00 D) 2.50 4) An experiment in which the experimental unit (or subject) does not know which treatment he 4) or she is receiving is called a A) randomized block design C) double-blind experiment B) single-blind experiment D) matched-pairs design 5) A drug company wanted to test a new depression medication. The researchers found 400 5) adults aged 25-35 and randomly assigned them to two groups. The first group received the new drug while the second received a placebo. After one month of treatment, the percentage of each group whose depression symptoms decreased was recorded and compared. What type of experimental design is this? A) randomized block design C) matched-pairs design B) single-blind design D) completely randomized design Identify the data set's level of measurement. 6) marriage status (married, single, or divorced) of the faculty at the University of Colorado A) ordinal B) interval C) nominal D) ratio 6)

Explanation / Answer

1.

Answer = (states in south zone/Total states)*10

= 16/(9+16+12+13) *10

= 3.2 rounding off to 3

Thus option D

2.

Option B

Randomizing helps to ensure diversity and treatment is not due to single experimental unit characteristic

3

Count A = 4

Count B = 3

Count C = 3

Count D = 2

Value A= 4

Value B = 3

Value C = 2

Value D = 1

Thus, avg value = Sum(Value*count)/sum(count)

= (4*4+3*3+2*3+1*2)/(4+3+3+2)

= 33/12

= 2.75

Option B

4.

Option B

Single blind experiment is the one in which subject in not aware of the evaluation but researcher is aware of it

5.

Option C

This type of experiment where subject are exposed to two different cases and evaluated later is called matched pair design

6.

Marital status is Married, unmarried or divorced

It does not contain any interval

It does not represent any ratio

Its order is also not important hence not ordinal

Only classification is needed

Thus, nominal

Option C

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