A sampling distribution problem?A random sample of size 81 i

英语翻译
The sampling error for this study is plus or minus1.5 percent for questions asked of everyone in the sample and plus or minus 2.5 percent for information collected only form those who have had prior Internet access.

英语翻译
Probally he dad come down in the world and this sampling was all
that was left him from the time when he could afford to come and select his favorite pudding.
另一句:I do not believe I have the pleasure of knowing you.

AP统计学中的两个公式问题
在Princeton的书中有一个Sampling Distribution of a Sample Proportion和Sampling Distribution of a Sample Mean,他们的方差公式是不一样的.这两个有什么区别吗?为什么他们的方差公式不一样.

what`s the difference between cluster sampling and multi-stage sampling?

下列英语并列句的省略!
句子：“f(t) at some sampling instants is in a steady state and f(t) at other sampling instants is in a varying state.”
省略为：“f(t) at some sampling instants is in a steady state and at other ones in a varying state.”是否正确?

the definition of random sampling
需要英文解释

外贸英语,合同上的翻译,关于SAMPLING的.向大家求教
SAMPLING: 取样

These operations shall be carried out at the discharging port at Buyer’s cost in sampling lots of approximately 25 (twenty five ) MT, as per usual practice, according to ton bag No , Lot No and Container No for sampling , by SGS. Weight AND Quality testing taken here shall govern as final. Assays shall be exchanged for determination of final quality.
Lot No. 在这里,应该是批次呢,还是堆次?
这一段我不是太理解,为什么取样要取25吨.具体检测时候25吨不是检疯掉?

英语翻译
Probably he had come down in the world and this sampling was all that was left him from the time when he could afford to come and select his favorite pudding.
我不太看得懂,特别是后面部分,from the time when .是从他有能力去买选择布丁的以后 还是 时候啊
这是 大学英语精读 第一册 第七课 THE SAMPLER 的一段 left 是留给的意思

英语翻译
Sampling and sample preparation shall be in accordance with the requirements of EN ISO 14284 and EN ISO 377.In addition,the stipulations in 7.3.2.2 apply for the mechanical tests.

英语翻译
8.3.Sniff test
To develop a sampling method for off-flavored beef samples,10 g slices of the knuckle were sliced off on the fabrication line in a packing plant,cooked immediately in a room with air purifiers and smelled and/or tasted to determine if the sample was off-flavored.Samples that were thought to be off-flavored by this test were taken to the meat laboratory at the University of Nebraska and reevaluated by the panelists that had performed the evaluation at the plant.Contingency tables revealed the panelists were in close agreement,but there were few samples with the liver flavor (Jenschke,Hamling,et al.,2006).Further work is needed to confirm the usefulness of this method to study liver-like off-flavors.
8.4.Feedlots and pre-harvest conditions
A total of 328 knuckles,which came from five different feedlots,were tested by the two panelists.Utilizing smelling and tasting,feedlot A had 5.0% off-flavored samples (1 of20),feedlot B had 9.4% (5 of 53),feedlot C had 6.7% (10of 148),feedlot D had 12.5% (9 of 72) and feedlot E had 14.3% (5 of 35) (Jenschke,Hamling,et al.,2006).No relationships between any of the pre-harvest traits or liver scores and the prevalence of off-flavors existed.There were also no trends in muscles having liver-like flavor and medical treatment or feed additives received (data not shown).Since distribution of off-flavors varied among feedlots,future research should investigate pre-harvest factors that might lead to off-flavor development.

1“ at the sampling rate of 50MSample/s ”
这句话的意思是说采样速率是每秒50Mhz么?还是说每秒采50M的样本?

6.He was busy sampling the delicious puddings,only breaking ___ occasionally.
11 Deep into the night,the bus pulled into Howard Johnson’s,and everybody got off ____ Vingo.He sat there still.
a.except b.except for c.beside d.besides
12 Vingo smiled and ___ a swig from the wine bottle.
a.made b.picked c.brought d.took
13 He thanked the girl for the wine and ___ again into his silence.
a.relaid b.retreated c.relocated d.replaced
14 Vingo went in Howard Johnson’s,and the girl insisted that he ____ them.
a.joined b.was to join c.join d.joining
15 Tom wrote his wife again when he was sure the parole was coming _____.
a.up b.through c.off d.out
16 If she had asked him to ___ her son,he would not have been able to refuse.
a.take place b.take the place of c.in place d.in place of
17 The woman began to sob when Homer was sitting there.He really wanted to get ___ and run.
a.off b.out d.down d.up
18 The movement of the door was as if,____ she was,she had nothing in the world to fear.
a.whoever b.whatever c.whichever d.however
19 ____ a messenger,she had thought of opening the door to someone she had known a long time.
a.In stead b.In stead of c.Instead d.Instead of
20 After sitting there for a while,the boy got ___ his feet and said good bye to her.
a.up b.on c.to d.down

英文翻译：
The sampling error is the difference between a sample statistic and its corresponding population parameter.
2：The sampling distribution of the sample mean is a probability distribution of all possible sample means of a given sample size.

英语翻译
Inspection sampling plan complies with MS – 105 E single sampling plans based on AQL Level II (1 for
Major and 4 for minor).
这是一验货条款,请问怎么翻译.

Specifies the average sampling rate in kilobits per second for the specified duration.
不要词霸直接翻译

the inspection is usually made using random sampling.为什么用use的ing形式

英语翻译
谁能帮我翻译下!奖励可以增加
Sampling sites were situated along a gradient of pollution going from the smelter to the North-East.All sites were covered by Scotch pine (Pinus silvestris L.).Samples were collected from three locations that were situated at intervals of approx.1,2 and 6 km from the smelter (further referred to as soils A,B,and C).The locations have a similar soil structure:sandy with approximately 2.5% of clay (Koopmans et al.,1993).Samples were taken from the upper 10 cm of the soil mineral layer (litter was removed).On either location four replicate plots were sampled.From each replicate 15 soil cores,4 cm in diameter and 10 cm depth were taken and then mixed and sieved (0.5 cm mesh).
Preparation of samples
After sieving,field moist soil from each plot was divided into subsamples of approx.250 g and each of them was placed in a 300 ml plastic jar.The samples were divided into four sets,each containing four samples.One set was treated with lead nitrate(1000 mg Pb kg)1 dw),the second was treated with sodium chloride (6.67 g NaCl kg)1 dw),the third was heated for 18 h at 50 C and the fourth one served as a non-stressed control.After treatment samples were kept in darkness at a temperature of 20 C until measurement.From each jar samples for respiration,bacterial growth rate measurement and chemical analyses were taken.
Respiration
Twenty four hours before each measurement 200 g of soil from each jar was placed into ±600 ml glass bottles and dry lucerne meal (alfalfa (Medicago sativa)) was added and mixed thoroughly.Lucerne was added in amounts corresponding to 3.2 g C kg)1 soil,which was sufficient to induce respiration and offset nutrient limitation.Without substrate addition the respiration is usually too low to measure significant differences within 24 h.Carbon dioxide production was measured with a GC apparatus (Carlo ERBA Instruments).For the first measurement samples were prepared as described above directly after application of stress and termination of disturbance.
Measurement was performed as follows:5 g of soil was shaken with 40 ml of milliQ-water in plastic tubes,then centrifuged and filtered through glass wool.Supernatants (1.5 ml) were decanted into eppendorf tubes.Samples were incubated for 2 h at 20 C with 3.75 ll radioactively labelled thymidine (methyl[3H thymidine,925 GBq mmol)1,Amersham,U.K) diluted1:3 with milliQ-water.Incorporation,washing of excess tracer,and measurement of radioactivity incorporated by actively growing bacterial cells are described in detail by Ba˚ a˚ th et al.(2001).Radioactivity was measured using a Beckman liquid scintillation spectrometer.Because a well established conversion factor is lacking for this method,the results are expressed in DPM units(decays per minute).DPM values are proportional to the amount of cells produced during 2 h of incubation.