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Samples are often used as all possible data could be impractically large to procure.
For instance, if I wanted to find out the average weight of frogs in a lake, I could drain the entire lake, use a chemical spray to immobilise all frogs, and then weigh each one individually, but that would be a mammoth task. Fencing off a section of the lake and taking a sample would be considerably cheaper, less time consuming, and more practical, and would only give us a slightly less accurate result.
Another issue is that people often are unwilling/unable to respond to a survey. If we tried to get the shopping habits of everyone going into a shop, many will be in a hurry or just plain not want to be surveyed. For this reason, the results will end up being incomplete anyway, so the person may as well set clear qualities she wants a sample to have.
Samples are often used as all possible data could be impractically large to procure.
For instance, if I wanted to find out the average weight of frogs in a lake, I could drain the entire lake, use a chemical spray to immobilise all frogs, and then weigh each one individually, but that would be a mammoth task. Fencing off a section of the lake and taking a sample would be considerably cheaper, less time consuming, and more practical, and would only give us a slightly less accurate result.
Another issue is that people often are unwilling/unable to respond to a survey. If we tried to get the shopping habits of everyone going into a shop, many will be in a hurry or just plain not want to be surveyed. For this reason, the results will end up being incomplete anyway, so the person may as well set clear qualities she wants a sample to have.
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What are the syllables for desirable?
There are four syllables in the word desirable. The syllables of the word are de-si-ra-ble.
Why do polls have different outcomes?
Because they are based on samples and outcomes vary between different samples.
How do you calculate the error of a median for a non-parametric distribution?
You would need to take repeated samples, find their median and then calculate the standard error of these values.
What do samples in a t test in a data set do?
All that the samples do is enable the observer to make measurements of some characteristic.
How many different simple random samples of 7 are possible from a pool of 25?
There are 25C7 different samples of seven from a pool of 25.25C7 = 25!/(7!(25-7)!) = 480 700 different samples of 7
How to take samples to Mexico?
Samples of what?
Why do people often work with samples in statistics?
to save money
What is the most socially desirable category in 1 and 4 letters?
In 1 letter, "A" (as in A grades) is often seen as socially desirable. In 4 letters, "Love" is typically considered a socially desirable category.
When do you not take a blood sample?
Samples must be take before milking
How can one get free samples mailed to their home?
Company websites often offer free samples and coupons as a reward for registration. these are often mailed to the home but can also come in the form of a redeemable voucher.
How often should water samples be taken?
Water samples should typically be taken on a regular basis, such as monthly or quarterly, depending on the specific water source and any regulatory requirements. It's also important to take additional samples after significant events like heavy rainfall or system maintenance to monitor changes in water quality.
Do volcanologists work inside or outside?
Volcanologists work both inside and outside. They study rocks in laboratories and they often visit active volcanoes to take measurements and samples.
Before George Gallup which characteristic did polling samples often have?
biased
What kind of samples are offered by Clinique?
Clinique offers small samples of facial lotion, lipstick, lipgloss, eyeshadow, and mascara. They will often send small free samples in the mail and include samples as gifts with purchases, packed in a small cosmetic bag.
Where do you take the swimming pool samples from?
the aquatic centre
Which price analysis techique is normally considered to be the least desirable comparison base?
Using historical prices as the only basis for comparison is often considered the least desirable technique as it does not take into account current market conditions, factors, and trends that could affect the price.
Why did Napoleon Bonaparte live?
Because it is often considered to be more desirable than the alternative.
