adhesive. noun. a substance used for making things stick together.

Adhesives are used to stick things together. Many adhesives we use every day are made in factories. Others occur in nature and have important uses for plants and animals.

Some examples of things that stick together include clothes after they were in the dryer because a charge builds up on the objects, causing them to attract to each other. Things that don’t stick together may include two neutral objects, like two pieces of neutral paper.

An element is a pure substance that cannot be separated into simpler substances by chemical or physical means.

: to bear reciprocal or mutual relations : correspond If two things correlate, a change in one thing results in a similar or opposite change in the other thing.

4 things you need to survive: FOOD, SHELTER, WATER, LAND.

Things That Go Together Quiz

Pair means two similar things, often used together, or two persons or animals. An example of a pair is two sneakers, one for the left foot and one for the right foot. An example of a pair is two people who are going to get married. Two playing cards of the same denomination.

A couple of related words are threesome and triad, both of which mean a group of three. In general, threesome is used for people and triad, for inanimate objects.

usage: When modified by a number, the plural of pair is more commonly pairs, esp. The unmarked plural pair is used mainly in reference to inanimate objects or nonhumans: four pair (or pairs) of loafers; two pair (or pairs) of oxen.

Ask your child, “Can you tell me which body parts come in twos?” He might list feet, hands, eyes and ears. You can explain, “If you have two things that look the same, they make a pair. So, you have a pair of eyes, ears, hands and feet. Things that go with those body parts also come in pairs.

countable noun. A pair of things are two things of the same size and shape that are used together or are both part of something, for example, shoes, earrings, or parts of the body.

1 : two things that match or are meant to be used together a pair of gloves a pair of draft horses. 2 : a thing having two similar parts that are connected a pair of scissors. 3 : two people who are connected in some way or do something together Those two are quite a pair.

No, “a pair (or set) of twins” isn’t redundant, it’s just emphasizing their twin-ness. They are also separate people, obviously. You can use a singular verb only when the people are acting as a unit (“the couple wants/want to get married as soon as possible”).

2 pairs sentences. 2 pairs sentences begin with 2 pairs of related adjectives: Exhausted and worried, cold and hungry, they did not know how much further they had to go.. adjective.

to make a pair of (two persons or things) by matching, joining, mating, etc.

For example, humans have 23 pairs of chromosomes–22 pairs of numbered chromosomes called autosomes, 1 through 22, and one pair of sex chromosomes, X and Y. Each parent contributes one chromosome of each pair to an offspring.

Two together. Often with something in common. Example: {12,7} is a pair of numbers.

A matched pairs design is a special case of a randomized block design. It can be used when the experiment has only two treatment conditions; and subjects can be grouped into pairs, based on some blocking variable. Then, within each pair, subjects are randomly assigned to different treatments.

matched pairs means you are dividing your sample into blocks of size 2. So in your example they are taking that list and blocking by the top 2 purchasers, then the next 2, and so on. That helps mitigate the random chance of more of the top purchasers in one treatment group.

By itself, a randomized block design does not control for the placebo effect. To control for the placebo effect, the experimenter must include a placebo in one of the treatment levels. In a matched pairs design, experimental units within each pair are assigned to different treatment levels.

Differences between the group means can no longer be explained by differences in age or gender of the participants. The primary advantage of the matched pairs design is to use experimental control to reduce one or more sources of error variability. One limitation of this design can be the availability of participants.

A matched-pairs t-test is used to test whether there is a significant mean difference between two sets of paired data. Define a new variable d, based on the difference between paired values from two data sets. …

Two-sample t-test is used when the data of two samples are statistically independent, while the paired t-test is used when data is in the form of matched pairs. However, if we have n matched pairs, the actual sample size is n (pairs) although we may have data from 2n different subjects.

A completely randomized design is probably the simplest experimental design, in terms of data analysis and convenience. In this design, the experimenter randomly assigned subjects to one of two treatment conditions. They received a placebo or they received a cold vaccine.

ADVERTISEMENTS: In case of CRD randomization is done treatment-wise. In RBD randomization is done replication or block-wise. In case of LSD, randomization is done with help of reduced latin square and then rows, columns and treatments are reshuffled with the help of random numbers.

Appropriate use of completely randomized designs 1. Under conditions where the experimental material is homogeneous, i.e., laboratory, or growth chamber experiments. 2. Where a fraction of the experimental units is likely to be destroyed or fail to respond.