Question 14 ldentify the sampling technique used to obtain a sample. Of all the

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Question 14 ldentify the sampling technique used to obtain a sample. Of all the fishermen on a lake, the game warden chooses to check the fishing license only of the first person that returns to the boat dock. O Cluster sampling O Systematic sampling Stratified sampling Question 15 ldentify the sampling technique used to obtain a sample. A game warden chooses to check for fishing licenses in every 5th boat he encounters on his patrol. O Cluster sampling O Systematic sampling Stratified sampling O Random sampling Question 16 Eighty-five percent of all knife accidents involve kitchen knives. Thus, kitchen knives are not as safe as other types of knives. O Always true O Always false O None of the above Question 17 Four out of five people have at least one sinus infection during their lives. Thus, in a family of five, exactly four family members are guaranteed to have a sinus infection.( Always true O Always false O Misinterpretation of statistics O None of the above Question 18 What best describes the number that is found by adding the lower and upper class limits and dividing the sum by 2. It is also called the class mark. O modal class O midpoint of a class Question 19 Which best describes a class with the greatest frequency? O modal class O class mark O mode

Explanation / Answer

14-C

Convenience sampling
as the game warden choses to check the perso.s license who is 1st of ALL the members.
Neither a group is chosen nor sampling is done for many fishermans.
Its the sole decision of a person to check only of 1 person. (This denotes the convenience of the game warden)

15-B

Because the game warden follows a PERIODICITY OR SYSTEMATIC APPROACH of choosing the samples out of the population i.e. EVERY 5th boat.

16-A

According to the problem, majority of the harm is caused due to kitchen knives. So the answer is supportive.

17-C

1st sentence says atleast 1.
2nd sentence says exactly 4
Irrelevant and non supportive 2nd statement to 1st staatement. cuz no one can be sure that its an exact number.
So, its a clear misinterpretation of statistics.

18-C

Defintion of mid point of a class interval

Class Mark or Mid Point:

The class marks or mid point is the mean of lower and upper class limits or boundaries. So it divides the class into two equal parts. It is obtained by dividing the sum of lower and upper class limit or class boundaries of a class by 2.

For Example: The class mark or mid point of the class 60 – 69 is 60+69/2 = 64.5

19-B

definition of modal class

MODAL CLASS - A class interval with highesst frequency

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