Test analysis: (1) What's the score? 、 、 ? ] frequency in three groups, calculate the total number of people and then draw a conclusion according to the definition of stratified sampling;

(2) Among the people selected from (1), there are students with grades and students with grades of 1. Then, among the people selected from (1), all cases of taking 1 person are listed as 10, and events are recorded, including

(1) According to the frequency distribution table, * * * is occupied.

There are people with good grades, so the number of people with good grades is.

(2) Among the students selected from (1), there are two students whose grades are, and they are, praised and trampled. What is your evaluation of this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem is not solved, please describe your problem in detail and provide free professional consultation through Baidu Legal Pro. Other similar questions 2022-11-1The results of a math exam are as follows:? 2020- 12-30 The frequency distribution of the scores of 40 students in a class in a math exam is as follows: 1220 14-03-08. All the 200 students in a school scored more than 75 and less than 150 in a math exam. The frequency distribution of scores is as follows: from 75 to 90, there are12016-03-14. The frequency distribution of the final grades (grades are integers) of 60 students in a class is as follows. Please answer the following questions according to the information provided in the form: 420 16- 12-. The histogram of frequency distribution is as follows: (1) According to the frequency of 320 16-09- 18, the scores of 100 students in a math exam in senior three of a school are analyzed and grouped according to their scores. The obtained frequency distribution table is as follows: 2016-11-27. A school selects 60 students from the final exam of senior one, and the frequency distribution histogram of their grades (all integers) is shown as follows: (1) Estimate 20 15-0 1-26. The frequency distribution histogram of their scores (all integers) is shown in the figure, which is estimated to be recommended to you: F.context('cmsRight') is especially recommended. [{ ' URL ':'/d 0 1373 f 082025 AAF 5 1 1aa 256 e 9 edab 64034 f 1a 07？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId':'A24KA00562 '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 17 19980856；