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Số lượng câu hỏi 7
Số lượng câu trả lời 6
Điểm GP 0
Điểm SP 3

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ponyo

Chủ đề:

Chương III : Thống kê

Câu hỏi:

A) THỐNG KÊ

Câu 1) Theo dõi điểm kiểm tra miệng môn Toán của học sinh lớp 7A tại một trường THCS sau một năm học, người ta lập được bảng sau: Điểm số 0 2 5 6 7 8 9 10 Tần số 1 5 2 6 9 10 4 3 N=40

a) Dấu hiệu điều tra là gì ? Tìm mốt của dấu hiệu ?

b) Tính điểm trung bình kiểm tra miệng của học sinh lớp 7A.

c) Nhận xét về kết quả kiểm tra miệng môn Toán của các bạn lớp 7A.

Câu 2) Điểm kiểm tra học kì II môn Toán của lớp 7C được thống kê như sau: Điểm 1 2 3 4 5 6 7 8 9 10

Tần số 1 1 2 3 9 8 7 5 2 2 N = 40

a) Biểu diễn bằng biểu đồ đoạn thẳng (trục tung biểu diễn tần số; trục hoành biểu diễn điểm số)

b) Tìm số trung bình cộng.

Câu 3): Điểm kiểm tra toán học kỳ I của học sinh lớp 7A được ghi lại như sau: 10 9 7 8 9 1 4 9 1 5 10 6 4 8 5 3 5 6 8 10 3 7 10 6 6 2 4 5 8 10 3 5 5 9 10 8 9 5 8 5

a) Dấu hiệu cần tìm ở đây là gì ?

b) Lập bảng tần số và tính số trung bình cộng.

c) Tìm mốt của dấu hiệu.

Câu 4). Điều tra về tuổi nghề (tính bằng năm) của 20 công nhân trong một phân xưởng sản xuất ta có bảng số liệu sau 3 5 5 3 5 6 6 5 4 6 5 6 3 6 4 5 6 5 6 5 a. Dấu hiệu ở đây là gì? b. Lập bảng tần số và tính số trung bình cộng của bảng số liệu trên. Câu 5). Điểm kiểm tra toán học kì II của lớp 7B được thống kê như sau: Điểm 4 5 6 7 8 9 10 Tần số 1 4 15 14 10 5 1

a) Dựng biểu đồ đoạn thẳng (trục hoành biểu diễn điểm số; trục tung biểu diễn tần số).

b) Tính số trung bình cộng

help me

ponyo
ponyo
ponyo

Chủ đề:

Luyện tập tổng hợp

Câu hỏi:

Rewrite these sentence:

1.“ I will help my teacher” Mr. Hong said
…………………………………………………............................…….....
2.“ Do you give Lan this book, Nam?’Quan said
................................................................................... ...................................
3.“ Where do you see your sister, Hoa” Miss Lien said
........................................................................... .................................
4..“Why don’t you do your homework , Minh? said Kien.
........................................................................................ ..............................................
5.“I often do my homework in the afternoon” Hue said.
...................................................................................... ...............................................
6.”Do you meet your brother in this place, Nam?” Long said.
........................................................................................................
7.“I play tennis after doing my housework with my sister in our house.” Minh said
.................................................................................... .................................................
8.“Tom, do you change this computer from your company?”
……………………………………………………….............
9.“ Why don’t you go to our English club with your friends , Hoa?” My said.
....................................................................................... ..............................................
10.“ Mr. Loan, Where is your house?” Tim said.
................................................................................... ...............................................
11.“Pha, I don’t know What your father’s name is.” He said.
....................................................................................... .........................................
12“ Hy, please do your homework before going to class tomorrow.” Nam said
......................................................................................... ...............................
13.Who must do these tests very carefully.
By...........................................................................................................?
14.Where does your father work, Hung?” She said
…………………………………………………………............................………
15.“ Where does your father work, Hung?” She said
………………………………………………........................................................
16.“Do you look after your brother carefully, Lien?” Tim said
…………………………………………........................................................
17.“Who will repair your house tomorrow.” said Mr. Nga
…………………………………………........................................................

Câu trả lời:

tu câu chose nek

I. Choose the word or phrase that best completes each sentence (10 pts)


1. He took his seat quietly_____ their conversation.
A. in order that not to disturb

B. so as to disturb
C. so as not to disturb

D. in order not disturb
2. The ________noise startled the woman.
A. frightened
B. frighten
C. frightening
D. fright
3. His shoes are very dirty. They need________ .
A. cleaning
B. cleaner
C. to clean
D. clean
4. His pronunciation causes me a lot of________ .
A. difficulties
B. difficult
C. difficulty
D. difficultly
5. _____ time you put your toys away.
A. It’s the
B. There’s
C. It’s
D. There is a
6. I caught ________of a lion lying under the tree, and my heart jumped.
A. view sai là cái chắc :-j
B. scene
C. look
D. sight
7. The students are used to ________in the school library.
A. work
B. working
C. worked
D. being worked
8. I’d rather ________until Jill comes back. Let’s go home.
A. not to wait
B. not wait
C. have not waited
D. I didn’t wait
9. We tried a lot of hotels, but ________of them had any free rooms.
A. neither
B. none
C. no
D. not
10. You want to address an envelope to a whole family. You write:_____ .
A. Mr. and Mrs. Wilson and family
B. Family Wilson
C. Family Mr. & Mrs. Wilson
D. Wilson’s family


Question II: Each of the following sentences has an error marked A, B, C or D. Identify it. (10p)


1. I suggested that you taking his advice to treat your cough.



2. The pollution of the sea can be the result of careless or dumping of waste.

3. The bridge was hitting by a large ship during a sudden storm last week.


4. If you took more exercise, you might feel healthily.


5. A daily newspaper was published in Germany in 1650, didn’t it?


6. I think it is necessary to students to wear uniforms when they are at school.

7. Though being ill,Mr. Ba went to the meeting last Monday.


8. There was never any secret among my sister and me when we were growing up.


9. It was very nice of you inviting me to your party.


10. I looked all over the house for her, but I couldn’t find her nowhere. bừa=))


Question III. Choose the word whose main stress is placed differently from the others. (5 pts)


1. A. understand
B. engineer
C. benefit
D. Japanese


2. A. television@-)
B. decoration
C. introduction
D. expectation


3. A. achievement:-SS

B. pesticide
C. minimize
D. dynamite


4. A. medicine
B. decide
C. distance
D. patient


5. A. design
B. exist
C. install
D. ethnicb-(

Question IV: Provide the correct form of the words in brackets. (10 pts)
1. The __________flights_____ are scheduled to take off at 15:00 and 15:30. (FLY)
2. It was the most ______educational_______________ visit to Hue Citadels. (EDUCATE)
3. There were 50 _______competitors______________in the talent contest. (COMPETE)
4. Sorry about the mistake, I ____misunderstood________the instructions you gave me. (UNDERSTAND)
5. His _______behavior_______________has not improved much. (BEHAVE)
6. She has an _____impressive____________command of the language. (IMPRESS)
7. It was extremely __careless______of you to leave your library books on the bus. (CARE)
8. She always listens _____attentionally:-SS_______________to what she is told. (ATTENTION)
9. This knife is __________useless______________ . It can’t cut anything. (USE)
10. There is no easy _____________solution________________to the problem. (SOLVE)

Fill in each gap with one suitable word to complete the following passage. (10 pts)


About twenty percent of the world’s present energy already (1)___comes_____ from the sun in one form or another. Special devices have already been made to (2)_put:-SS____ on the roofs of houses and flats to (3)__catch____ the sun’s ray and thus heat water.
Thousands (4)_____of___ these devices are now being used to provide (5)__:)|:)|______ in houses throughout the United States while more (6)__than____ a million solar water-heating units (7)_have_____already been built in houses in Japan. Other purposes for which solar energy is at present being used include the removal of salt (8)_from____ seawater and sewage disposal. For most people (9)__in____ developing countries, the need is not for air- conditioners or central heating but for cheap ways of (10)__cooking___ food, drying crops and lighting houses.