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HomeLớp 7Toán lớp 7 - Sách kết nối tri thứcThu thập số liệu thống kê. Bảng tần số.Bài tập trung bình
{"common":{"save":0,"post_id":"1376","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"911","post_id":"1376","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho ba c\u00e2u","temp":"fill_the_blank","correct":[[["40"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"Trong \u0111\u1ee3t \u1ee7ng h\u1ed9 \u0111\u1ed3ng b\u00e0o b\u1ecb l\u0169 l\u1ee5t \u1edf mi\u1ec1n Trung, $40$ b\u1ea1n l\u1edbp $7A$ \u0111\u00e3 quy\u00ean g\u00f3p ti\u1ec1n. B\u1ea1n l\u1edbp tr\u01b0\u1edfng \u0111\u00e3 ghi l\u1ea1i s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c c\u1ee7a m\u1ed7i b\u1ea1n trong b\u1ea3ng sau (\u0111\u01a1n v\u1ecb ngh\u00ecn \u0111\u1ed3ng): <br\/><table><tr><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>5<\/th><th>3<\/th><th>2<\/th><th>8<\/th><th>2<\/th><th>5<\/th><\/tr><tr><td>10<\/td><td>2<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>10<\/td><td>5<\/td><td>3<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>6<\/td><td>7<\/td><td>7<\/td><td>4<\/td><td>5<\/td><td>5<\/td><td>10<\/td><td>4<\/td><td>2<\/td><td>9<\/td><\/tr><tr><td>5<\/td><td>5<\/td><td>6<\/td><td>5<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>3<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> S\u1ed1 \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra l\u00e0 _input_","explain":"<span class='basic_left'> S\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea tr\u00ean $40$ b\u1ea1n h\u1ecdc sinh l\u1edbp $7A$ n\u00ean s\u1ed1 \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra l\u00e0 $40$. <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $40$.<\/span><\/span>"}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:53"},{"id":"912","post_id":"1376","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho ba c\u00e2u","temp":"fill_the_blank","correct":[[["11"],["6"],["3"],["9"],["2"],["2"],["1"],["1"],["5"]]],"list":[{"point":5,"width":50,"content":"","type_input":"","ques":"Trong \u0111\u1ee3t \u1ee7ng h\u1ed9 \u0111\u1ed3ng b\u00e0o b\u1ecb l\u0169 l\u1ee5t \u1edf mi\u1ec1n Trung, $40$ b\u1ea1n l\u1edbp $7A$ \u0111\u00e3 quy\u00ean g\u00f3p ti\u1ec1n. B\u1ea1n l\u1edbp tr\u01b0\u1edfng \u0111\u00e3 ghi l\u1ea1i s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c c\u1ee7a m\u1ed7i b\u1ea1n trong b\u1ea3ng sau (\u0111\u01a1n v\u1ecb ngh\u00ecn \u0111\u1ed3ng): <br\/><table><tr><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>5<\/th><th>3<\/th><th>2<\/th><th>8<\/th><th>2<\/th><th>5<\/th><\/tr><tr><td>10<\/td><td>2<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>10<\/td><td>5<\/td><td>3<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>6<\/td><td>7<\/td><td>7<\/td><td>4<\/td><td>5<\/td><td>5<\/td><td>10<\/td><td>4<\/td><td>2<\/td><td>9<\/td><\/tr><tr><td>5<\/td><td>5<\/td><td>6<\/td><td>5<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>3<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> \u0110i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng trong b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>$N=40$<\/td><\/tr><\/table>","hint":"T\u1ea7n s\u1ed1 c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 s\u1ed1 l\u1ea7n xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb trong d\u00e3y gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u.","explain":"<span class='basic_left'> Ta c\u00f3 b\u1ea3ng 't\u1ea7n s\u1ed1' d\u1ef1a theo b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u nh\u01b0 sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>11<\/td><td>6<\/td><td>3<\/td><td>9<\/td><td>2<\/td><td>2<\/td><td>1<\/td><td>1<\/td><td>5<\/td><td>$N=40$<\/td><\/tr><\/table> <br\/><span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: $11;6;3;9;2;2;1;1;5$<\/span> <\/span>"}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:53"},{"id":"913","post_id":"1376","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho ba c\u00e2u","temp":"fill_the_blank","correct":[[["27,5","27.5"],["15"],["7,5","7.5"],["22,5","22.5"],["5"],["5"],["2,5","2.5"],["2,5","2.5"],["12,5","12.5"]]],"list":[{"point":5,"width":50,"content":"","type_input":"","ques":"Trong \u0111\u1ee3t \u1ee7ng h\u1ed9 \u0111\u1ed3ng b\u00e0o b\u1ecb l\u0169 l\u1ee5t \u1edf mi\u1ec1n Trung, $40$ b\u1ea1n l\u1edbp $7A$ \u0111\u00e3 quy\u00ean g\u00f3p ti\u1ec1n. B\u1ea1n l\u1edbp tr\u01b0\u1edfng \u0111\u00e3 ghi l\u1ea1i s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c c\u1ee7a m\u1ed7i b\u1ea1n trong b\u1ea3ng sau (\u0111\u01a1n v\u1ecb ngh\u00ecn \u0111\u1ed3ng): <br\/><table><tr><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>5<\/th><th>3<\/th><th>2<\/th><th>8<\/th><th>2<\/th><th>5<\/th><\/tr><tr><td>10<\/td><td>2<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>10<\/td><td>5<\/td><td>3<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>6<\/td><td>7<\/td><td>7<\/td><td>4<\/td><td>5<\/td><td>5<\/td><td>10<\/td><td>4<\/td><td>2<\/td><td>9<\/td><\/tr><tr><td>5<\/td><td>5<\/td><td>6<\/td><td>5<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>3<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 3: <\/b> \u0110i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng th\u1ec3 hi\u1ec7n t\u1ea7n su\u1ea5t t\u01b0\u01a1ng \u1ee9ng c\u1ee7a t\u1eebng gi\u00e1 tr\u1ecb (t\u00ednh theo ph\u1ea7n tr\u0103m) trong b\u1ea3ng sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>11<\/td><td>6<\/td><td>3<\/td><td>9<\/td><td>2<\/td><td>2<\/td><td>1<\/td><td>1<\/td><td>5<\/td><td>$N=40$<\/td><\/tr><tr><td>T\u1ea7n su\u1ea5t $(f)$<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>100%<\/td><\/tr><\/table>","hint":"T\u1ea7n su\u1ea5t c\u1ee7a gi\u00e1 tr\u1ecb l\u00e0 t\u1ec9 s\u1ed1 c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb v\u00e0 s\u1ed1 t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea.","explain":"<span class='basic_left'> T\u1ea7n su\u1ea5t t\u01b0\u01a1ng \u1ee9ng c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong b\u1ea3ng sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>11<\/td><td>6<\/td><td>3<\/td><td>9<\/td><td>2<\/td><td>2<\/td><td>1<\/td><td>1<\/td><td>5<\/td><td>$N=40$<\/td><\/tr><tr><td>T\u1ea7n su\u1ea5t $(f)$<\/td><td>27,5%<\/td><td>15%<\/td><td>7,5%<\/td><td>22,5%<\/td><td>5%<\/td><td>5%<\/td><td>2,5%<\/td><td>2,5%<\/td><td>12,5%<\/td><td>100%<\/td><\/tr><\/table> <br\/><span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: $27,5;\\,15;\\, 7,5;\\,22,5;\\,5;\\,5;\\,2,5;\\,2,5;\\,12,5$<\/span> <br\/> <b> L\u01b0u \u00fd: <\/b> <i>T\u1ea7n su\u1ea5t $f$ c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $f=\\dfrac{n}{N}$ trong \u0111\u00f3 $N$ l\u00e0 s\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb, $n$ l\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb. <br\/> - Ng\u01b0\u1eddi ta th\u01b0\u1eddng bi\u1ec3u di\u1ec5n t\u1ea7n su\u1ea5t d\u01b0\u1edbi d\u1ea1ng t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m. <\/i><\/span>"}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:53"}]}