The number of hours needed by sixth grade students to complete a ...

[ETearle]

The number of hours needed by sixth grade students to complete a research project was recorded with the following results.
 
  Hours Number of students (f)
   4 22
   5 16
   6 16
   7 13
   8 14
   9 8
  10+ 5
 
  A student is selected at random. The events A and B are defined as follows.
 
  A = the event the student took between 6 and
   9 hours inclusive
  B = the event the student took at most 7 hours
 
  Determine the number of outcomes that comprise the event (A or B).
  A) 118 B) 29 C) 51 D) 89

Question 2

Several watch-dog consumer groups have criticized the fast food industry for serving food with excessive fat content. One watch-dog announced that it will randomly select one fast food chain per week.
 
  The watch-dog will then decide, as a group, to purchase one item off the menu that has been advertised the most on television and in the newspapers. The watch-dog will then have that heavily-advertised, just-purchased item professionally sampled for fat content. Weekly results will be posted on the watch-dog's website. For this scenario, what best describes the watch-dog's sampling activities each week?
  A) Multistage sampling B) Stratified sampling
  C) Systematic sampling D) Cluster sampling

[voltaire123]

Answer to Question 1

D

Answer to Question 2

A

[ETearle]

TYSM

[AngeliqueG]

Gracias!