Classify the following as population or sample:

(a) All the senators of the United States presently in office

(b) 1500 people selected to find out the soft drink preference in Chicago For the following questions, would you collect information using a sample or a population?

(a) A survey to rank the famous television shows in United States

(b) A research project to find how many heart attack patients are admitted on January 1 to a famous hospital

(c) A study to find the quality of matchsticks in a bundle of 100 matchboxes

(d) An evaluation of the creativity of the director of three films

From the data in the Statistical Abstract of United States represented below with details, choose the kind of scale that can be used to measure them.

There were 200 males and 150 females who were enrolled for the doctoral program at the local college university in 2008.

a) Nominal

b) Interval

c) Ordinal

d) Ratio

AVX Stereo Equipment, Inc., recently began a "no-hassles" return policy. A sample of 600 customers who recently returned items showed 380 thought the policy was fair, 180 thought it took too long to complete the transaction, and the rest had no opinion. On the basis of this information, make an inference about customer reaction to the new policy. (Round your answers to 1 decimal place.)

Customer reactionPercent

Fair.............................%

Too long.......................%

No opinion....................%

The above data suggests that majority of the customers

a) Believe the policy is fair

b) Believe it took to long to complete

c) Had no opinion