[RaanaTii]

13. ...... statistics is based on probability theory.
a. Deive
b. Differential
c. Inferential
d. Answer A & C

في سؤال في الكتاب زي هاذا ومكتوب بس ال Inferential

14. The number of minutes needed for a student to reach KAU from his home is
... variable.
a. ordinal
b. nominal
c. continuous.
d. discrete.

هذا حاسني = ( بس مادام الجالونات خلوها دسكريت حتى هذا يصير دسكريت عشان نمبر اوف = / ما ادري = /

15. Students' registration numbers (Identification numbers) are example of ... data
a. ordinal
b. nominal
c. continuous.
d. discrete.

نومينال = / سألت فيها الأستاذه وقالت لي نومينال واحس ممكن تجي اوردينال والله اعلم =/ حتى كانت مستعجله =( قالت لي بس انو عشان ماتسوي تفرقه بين الطلاب ماني عارفه كيف = / بس انا عاجبتني اوردينال كيفهم عاد =|

17. An auto analyst is conducting a satisfaction survey, sampling from a list of 10,000
new car buyers. The list includes 2,500 Ford buyers, 2,500 GM buyers, 2,500 Honda
buyers, and 2,500 Toyota buyers. The analyst selects a sample of 400 car buyers, by
randomly sampling 100 buyers from each brand. Is this an example of a simple random
sample?
a. Yes, because each buyer in the sample had an equal chance of being sampled.
b. Yes, because car buyers of every brand were equally represented in the sample.
c. No, because every possible 400-buyer sample did not have an equal chance of being
chosen.
d. No, because the population consisted of purchasers of four different brands of car.

D لانه تقسمت ماتصير راندوم stratified


19. In the cluster sampling technique …
a. the researcher divided the population into samples and selected groups from the
samples.
b. the researcher divided the population into groups and selected samples from the
groups.
c. the researcher divided the population into samples and selected elements from the
samples.
d. the researcher divided the population into samples.

a =/ لانه لازم قروب كامل ياخذ اذا اخذ سامبل من قروب يصير stratified


26. Researchers want to test new treatments (A, B) on a sample of 30 patients suffering
from flue. They chose 15 of them randomly to take treatment A while the other 15 took
treatment B. Then after three days a doctor will check on them and find out how the
treatments affect the patients. The type of study is …
a. observational.
b. experimental.
c. quasi-experimental.
d. convenient.

وليه ماتصير C =(


29. Probability is used as a basis for a statistlcs study

كمان Inferential statistic

بس هذا اللي شفته p=
انت احكي لي كيف حليت فهمني كيف وصلت للحل D= ومرسي ياسوكر 3>