ساعدوني حل أسئلة الأحصاء الباب الاول

[feras99]

السلام عليكم


ياشباب وبنات تكفى ابا حل اسئلة الاحصاء الباب الاول


تر بكرا لازم اسلمها امانه عليكم ساعدوني

وانا مني فاهم شي مرررررره

الاسئله كالتالي :



6- Identify each study as being either observational or experimental.

a. Subjects were randomly assigned to two groups and one group was given an herb and the other group a placebo. After 6 months, the numbers of respiratory
tract infections each group had were compared.

b. A researcher stood at a busy intersection to see if the color of the automobile that a person drives is related to running red lights.

c. A researcher finds that people who are more hostile have higher total cholesterol levels than those who are less hostile.

d. Subjects are randomly assigned to four groups. Each group is placed on one of four special diets—a low-fat diet, a high-fish diet, a combination of low-fat diet and high-fish diet, and a regular diet. After 6 months, the blood pressures of the groups are compared to see if diet has any effect on blood pressure


7- Determine whether each statement is true or false. If the statement is false, explain why.



a. Probability is used as a basis for inferential statistics.


b. The height of President Lincoln is an example of a variable



c. The highest level of measurement is the interval level.




d. When the population of college professors is divided into groups according to their rank (instructor, assistant professor, etc.) and then several are selected from each group to make up a sample, the sample is called a cluster sample



e. The variable age is an example of a qualitative variable.





f. The weight of pumpkins is considered to be a continuous variable



8. The number of absences per year that a worker has is an example of what type of data?
a. Nominal
b. Qualitative
c. Discrete
d. Continuous


9. A researcher divided subjects into two groups according to gender and then selected members from each group for her sample. What sampling method was the researcher using?
a. Cluster
b. Random
c. Systematic
d. Stratified


12. A variable that interferes with other variables in the study is called
a. A confounding variable.
b. An explanatory variable.
c. An outcome variable.
d. An interfering variable

Use the best answer to complete these statements.


17. Two major branches of statistics are and .


18. The group of all subjects under study is called a(n)

[feras99]

يا شباب تكفى اللي حل يفك لي الازمه

[feras99]

ياشباب ابا الحل قبل ما انااام

[د/ روميو]

المشاركة الأصلية كتبت بواسطة feras99 ياشباب ابا الحل قبل ما انااام

أخوي ،،،
أنت اي شعبة ،،،؟؟؟
الساعة 1 تبدى المحاضرة ،،،
الدكتور/ حسن صلاح
؟؟؟

[feras99]

الدكتور معرفه هو مصري

تبدا الساعه 8 الصبح لم 8:50

الماده احصاء 110

تكفى لو تعرف شي فيدنا

[د/ روميو]

المشاركة الأصلية كتبت بواسطة feras99 الدكتور معرفه هو مصري تبدا الساعه 8 الصبح لم 8:50 الماده احصاء 110 تكفى لو تعرف شي فيدنا

والله هي موجودة في مكتبة في السليمانية محلولة ،،،
بس مش متذكر أسم المكتبة ،،،
لاكن هي بجانب ،،، مطعم التميمي ،،،
حق السمك وحق المشويات عرفته ،،،
بجانبة مباشرة ،،
طبعا موجودة محلولة كامل الهوم ورك ،،،
تحياتي ،،،

[كومة مشآعر]

6- Identify each study as being either observational or experimental.

a. Subjects were randomly assigned to two groups and one group was given an herb and the other group a placebo. After 6 months, the numbers of respiratory
tract infections each group had were compared.

experimental

b. A researcher stood at a busy intersection to see if the color of the automobile that a person drives is related to running red lights.

observational


c. A researcher finds that people who are more hostile have higher total cholesterol levels than those who are less hostile.

observational

d. Subjects are randomly assigned to four groups. Each group is placed on one of four special diets—a low-fat diet, a high-fish diet, a combination of low-fat diet and high-fish diet, and a regular diet. After 6 months, the blood pressures of the groups are compared to see if diet has any effect on blood pressure

experimental

7- Determine whether each statement is true or false. If the statement is false, explain why.



a. Probability is used as a basis for inferential statistics.

True

b. The height of President Lincoln is an example of a variable

false

c. The highest level of measurement is the interval level.

false

nominal level


d. When the population of college professors is divided into groups according to their rank (instructor, assistant professor, etc.) and then several are selected from each group to make up a sample, the sample is called a cluster sample

false

called stratified

e. The variable age is an example of a qualitative variable.

false

Quantitative variables



f. The weight of pumpkins is considered to be a continuous variable

True

8. The number of absences per year that a worker has is an example of what type of data?
a. Nominal
b. Qualitative
c. Discrete
d. Continuous


9. A researcher divided subjects into two groups according to gender and then selected members from each group for her sample. What sampling method was the researcher using?
a. Cluster
b. Random
c. Systematic
d. Stratified


12. A variable that interferes with other variables in the study is called
a. A confounding variable.
b. An explanatory variable.
c. An outcome variable.
d. An interfering variable

Use the best answer to complete these statements.


17. Two major branches of statistics are Deive
and inferential.


18. The group of all subjects under study is called a sample(n)

وسووري مآ حطيت في السؤآل الصح والخطأ السبب لأني مو كآتبهـ الأسبآب عندي ..

وأتمنى إني أفدتكـ .. دعوآتكـ / كومة مششآعر

[مــــلاكـ]

experimental/a
b/observational
c/observational
d/experimental
*
a/T
b/F
c/F
d/F
e/F
f/T
*
c
d
a
هاذا اللي حليته مع الاستاذة لاتسألني كيف لاني مأعرف بس حليته معاها وماني فاهمة شيء......

[feras99]

كومة مشاعر

اللهم اجعلها في ميزان حسناتها

الله يغفر عنك خطايك ويبدلك عنها حسنات

اللهم فرج عنها همومها ا كما فرجت عني هما


الف شكر لك اختي الغاليه

واشكرك اخي الغالي دكتور روميو

[feras99]

الله يجزاك خير اختي ملاك

والله يجزي الجميع خير