تكفون عندي أسئلة وبي شرح حلها .... جابولي عليها.. وعند طلب ...

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أولاُ هذه الأسئلة حقة النهائي الترم الأول نزلتها من هذا الموقع بس أنا ابي طريق الحل تكفووووووووووو ن للمسائل

عندي طلب ثاني مهم أبغا ملخص الباب الرابع كامل حق أشرف بركات او اي واحد بس يكون فيه the multiplication rules






1429-1430

A

Final Exam

STAT 110
King Abdul Aziz University
Faculty of Sciences
Statistics Department
Name No ID: Section:
You have 40 questions in 9 pages. You have 90 minutes to solve the exam. Please mark all
your answers on the answer sheet provided to you. You can use your question paper to solve
problems but only answer sheets will be graded. You have to submit both questions paper and
answer sheet. Be sure that the answer model matches the question model. Good luck
Choose the best answer from the following questions:

1. How many different ways can four people: Andy, Betty, Cindy, and Doug, sit in a
row at the cinema if Andy and Betty must sit together?
A) 18
B) 6
C) 12
D) 24

2. A measure defined as the difference between the third
quartile and the first quartile
and is used to identify outliers is called a(n)
A) decile
B) interquartile range
C) z-score
D) percentile

3. On a Pareto chart, the frequency should be represented on the
A) X-axis
B) regression
C) Y-axis
D) none of the above

6. How many outcomes are there in the sample space if a coin is tossed once and a die

is rolled?
A) 10
B) 4
C) 12
D) 36

7. 3 statistics professors and 7 chemistry professors are available to be advisors to a
student organization. The student organization needs two of the professors to be
advisors, what is the probability that both professors are chemistry professors?
A) 0.111
B) 0.233
C) 0.100
D) 0.467

8. The graph that represents the cumulative frequencies for the classes in a frequency
distribution is called a(n)
A) ogive
B) time series
C) histogram
D) bar chart

9. The …….is the sum of the frequencies accumulated to the upper boundary of a class
in the distribution.
A) frequency polygons
B) cumulative frequency
C) relative frequency
D) percent

10. A characteristic (measure) obtained by using all the data values from a specific
population is called a
A) factorial
B) statistic
C) parameter
D) none of the above

11. Which of the following properties does not apply to a theoretical normal
distribution?
A) the mean, median, and mode are equal
B) the normal distribution is bimodal
C) the normal distribution is bell-shaped
D) the curve never touches the x-axis
Page 2

12. The number of beds in 8 hospitals in Jeddah is 230, 410, 540, X, 620, 1200, 1250
and 1300, where X is unknown value. If the median is 600, then the value of X is
A) 580
B) 420
C) 850
D) 620

13. What type of sampling is being used if KAU students are divided into different
groups according to their colleges and a sample is chosen from each college to be
surveyed?
A) stratified
B) cluster
C) random
D) systematic

A supermarket employs cashiers, managers, and cleaner. The distribution of employees
according to marital status is shown here. (Use the following table to answer questions 14, 15,
16)
Cashier manager cleaner Total
Married 8 12 3 23
Not married 5 15 2 22
Total 13 27 5 45
14. The employee is a cashier given that he is married
A)
11/4
B)
23/5

C)
23/8

D)
23/5

15. Find the probability that the employee is a manager or
married
A)
45/27
B)
45/38
C)
9/10
D)
5/3

16. The employee is not married
A)

45/ 13
B)
45/22
C)
45/20
D)
5/3
18. Urn 1 contains 5 red balls and 3 black balls. Urn 2 contains 3 red balls and 1 black
ball. Urn 3 contains 4 red balls and 2 black balls. If an urn is selected at random and
a ball is drawn. Find the probability it will be red?
A)
2
3
B)
49
72
C)
23
72
D)
49
24
If a coin is tossed 4 times, find the following (answer questions 19, 20 and 21)
19. The variance of the number of heads that will be obtained.
A) 4
B) 0.25
C) 2
D) 1
20. The probability of getting 4 heads.
A)
1
8
B)
1
4
C)
1
2
D)
1
16
21. The probability of getting 2 head..
A)
1
9
B)
1
8
C)
3
4
D)
3
8
Page 5
22. The average repair cost of a microwave oven is 55$, with a standard deviation of 8$.
the costs are normally distributed. If 12 ovens are repaired, find the probability that
the mean of the repair bills will be greater than 60$.
A) 0.0707
B) 0.015
C) 0.1236
D) 0.3707
23. The average height of a certain age group of people is 53 inches and the standard
deviation is 4 inches. If the variable is normally distributed, find the probability that
a selected individual's will be less than 57 inches.
A) 1
B) 0.3413
C) 0.8413
D) 0.1587
24. What z value corresponds to 17% of the data between the mean and the z value?
A) 2.1
B) 0.52
C) 0.125
D) 0.44
25. State the null and alternative hypotheses for the following conjecture (claim): The
average age of college students is 21.7
A) H0 :μ = 21.7,H1 :μ < 21.7(claim)
B) 0 1 H :μ ≠ 21.7,H :μ = 21.7(claim)
C) 0 1 H :μ > 21.7(claim),H :μ < 21.7
D) 0 1 H :μ = 21.7(claim),H :μ ≠ 21.7
26. Find the area under the standard normal distribution curve between the values z =
1.72 and z = 1.98
A) 0.4761
B) 0.4573
C) 0.0188
D) 0.9334
Page 6

27. Use the following graph to answer the question
5.00 10.00 15.00 20.00 25.00 30.00
The distribution shape is:
A) negatively skewed
B) symmetrical
C) can not determine
D) positively skewed

28. Rejecting the null hypothesis, 0 H , when it is true is called a
A) standard error
B) type I error
C) type II error
D) none of the above

29. A survey claims that the average cost of a hotel room in a city is $69. To test the
claim, a researcher selects a sample of 40 hotel rooms and finds that the average cost
is $67.56. The standard deviation of the population is $3.86. At α =0.05, do we
reject Ho and why?
A) Yes, because the critical value is 1.96
B) No, because the critical value is 1.96
C) Yes, because test value falls in the critical region
D) No, because the test value doesn't fall in the critical region
30. If a researcher wants to determine if there is a linear relationship between the number
of hours a person goes without sleep and the number of mistakes he makes on a
simple test. The following data is recorded.
n

=10,Σx = 46,Σy = 60,Σxy = 303andΣx 2 = 238

The equation of the regression line is

A) y ′ =1.3+1.02x
B)

y ′ =1.02 −1.3x

C)

y ′ =1.02 +1.3x

D)

y ′ =1.3−1.02x

Page 7

31. When there is a weak linear relationship between two variables, r will be close to
A) }1
B) -1
C) 0
D) 1
32. Find the area under the standard normal distribution curve to the left of the value z =
-1.73
A) 0.4582
B) 0.5280
C) 0.0418
D) 0.9582
33. A student takes a 7 question multiple choice quiz with 4 choices for each question. If
the student guesses at random on each question, what is the probability that the
student gets exactly 3 questions correct?
A) 0.346
B) 0.043
C) 0.173
D) 0.130
34. If 3% of calculators are defective, find the standard deviation of the defectives in
300 calculators?
A) 2.95
B) 0.79
C) 8.73
D) 9
35. The intercept of the regression line y ′ = −2x + 5
A) 3
B) 5
C) 7
D) -2
36. In the standard normal distribution, P (Z ≤ 0) is equal to
A) 1
B) 0.5
C) 0
D) -0.5
Page 8
37. An instructor gives a 100 point examination in which the grades are normally
distributed. The mean is 60 and the standard deviation is 10. If there are 5% A+ . find
the lowest possible score to get A+?
A) 96
B) 76.5
C) 43.5
D) 61.3
38. To test the hypothesis Ho :μ ≤ 24;H1 :μ > 24 at α = 0.05 If the test value = 2.10, Pvalue
=0.0179, then the decision is
A) reject 1 H
B) reject

o H

C) can not make a decision

D) do not reject o H
39. If the regression line is given by

y ′ = 5 + 3x ,then the correlation coefficient (r) is

A) zero

B) positive
C) negative
D) none of the above
40. Regression line is used to make prediction for the …….. variable.
A) dependent
B) explanatory
C) independent
D) none of the above
Page 9
Answer Key
1. C
2. B
3. C
4. D
5. C
6. C
7. D
8. A
9. B
10. C
11. B
12. A
13. A
14. C
15. B
16. B
17. A
18. B
19. D
20. D
21. D
22. B
23. C
24. D
25. D
26. C
27. D
28. B
29. C
30. A
31. C
32. C
33. C
34. A
35. B
36. B
37. B
38. B
39. B
40. A

Page 10
بعدين لو عندي صورة وأبي أنزلها في موضوع بالله كيف عشان الأسئلة عندي كصورة بس ماعرفة أنزلها

تكفون راح أتعبكم معايه

[υикиσωи]

<< اممم الاخوان التانيين فيهم الخير ان شالله يحلولك هيا ...

بسس ازا بدك سؤال معين من عنوني ..


بالنسبة كيف ندرج صورة ..
يا اما ترفع صورة من اي موقع رفع ملفات ...و تاخد اللنك وتحطو مباشرة



او ازا بدك تنزلها مرفقات هناا ... روح للوضع المتطور .... انزل تحت شوية ..عند الخيارات الاضافية ..تلاقي ( ارفاق ملفات )
اضغط عليه
تفتحلك صفحة صغيرة جديدة ..حط اللي تبغاه ...
واضغط ( رفع ) ...
وخلاص ..

=)

[مَـزٍآج ..}..]

مرهـ صعبـه أإحل اربعيـن سؤال

انت ذاكـر وبعدين حدد الاسئله الي ما فهمتها ..

[بيو كيميائية ^_^]

مره كثير أحل أربعين سؤال
ماراح أحل اربعين سؤال إلا في الإمتحان

أنت حدد الأسئلة اللي ماتعرفها أفضل
كذا يضيع وقت الواحد

بالتوفيق

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طيب أوكه تكفون حلولي هذه الأسئلة ..........

1. How many different ways can four people: Andy, Betty, Cindy, and Doug, sit in a
row at the cinema if Andy and Betty must sit together?
A) 18
B) 6
C) 12
D) 246

. How many outcomes are there in the sample space if a coin is tossed once and a die

is rolled?
A) 10
B) 4
C) 12
D) 36


. The average repair cost of a microwave oven is 55$, with a standard deviation of 8$.
the costs are normally distributed. If 12 ovens are repaired, find the probability that
the mean of the repair bills will be greater than 60$.
A) 0.0707
B) 0.015
C) 0.1236
D) 0.3707

[بيو كيميائية ^_^]

أول واحد
1*3*2*2=12
ثاني واحد
2^1*6^1=12 لأن قطعة النقود رميناها مرة وحدة وهي فيها وجهين فيصير 2 أس 1 وزهرة النرد برضو مرة وحدة وفيها سته أوجه فيصير 6أس 1
الثالث طويل حله وملانه أكتب

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السوال الأول من فين جبتي الأرقام ......