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What conditions are required for a valid large sample test for p?
Wiki User
∙ 11y ago
N>=30
N at-least greater then 30
Wiki User
∙ 11y ago
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Which conditions may be met for a scientifically valid sample?
at random to represent the population
The constant rate used as a gauge in calculating the valid sample size?
statistics
What are the advantages and disadvantages of random sampling?
The main advantage is that the sample is representative of the population and the mean of the sample is an unbiased estimate of the population mean. Also, characteristics of other statistics based on the sample are well understood. However, sometimes it may not be possible to gather valid information from a sampling unit and then the sample is no longer random. This can be either because the sampling unit cannot be located or has been compromised by external factors. This can be particularly serious if the "missing" units share a common characteristic. Also, simple random samples may not include any units representing characteristics that are rare in the population - but important in the context of the experiment.
What is a valid prediction range?
The valid prediction range is the range of the "predictor."
What kind of validity does the strategy of random sampling increase?
Random Sampling increases the reliability and validity of your research findings. To begin with, Reliability: By randomly picking research participants, the likelihood that they are from different backgrounds/ have different experiences etc. is higher and hence, they are said to be more representative of the population of interest. EG: RQ: Do females have higher IQ? A case of random sampling will pick females who are housewives/ CEOs/ Indian/ 18yrs old/ Divorced etc. the list goes on. While a case of non-random sampling (such as picking participants at a bus stop) may only result in a sample of females who are 20 - 35 years old, working professionals. Validity: As reliability and validity are related, for the research findings to be reliable and generalizable to the population of interest, it first has to be a valid sample. Hence, from the above example, EG1 provides a valid sample, while EG2 is invalid.
What conditions are required to form a valid large-sample confidence interval for you?
1) What conditions are required to form a valid large-sample confidence interval for µ?
Which conditions may be met for a scientifically valid sample?
at random to represent the population
When the sample size is large valid confidence intervals can be established for the population mean irrespective of the shape of the underlying distribution?
Yes, but that begs the question: how large should the sample size be?
Is a biased sample always valid?
a biased sample is valid determin
Why is obtaining a representative sample important?
Many statistical statements for a population which are based on a sample are not valid if the sample is not representative.
Why is it important to have a representative sample when doing surveys?
Because without representative sample, your results will not be valid.
How long is a group and hold blood sample valid for?
30 min
What do you need to travel to Aruba?
To travel to Aruba, a valid passport and valid return ticket are required. Also a valid visa sticker is required for tourists from certain countries. If the tourist is arriving in Aruba from a designated yellow fever country, then a valid vaccination certificate is required. Sometimes proof of valid reservations at tourist accommodations and proof of sufficient funds to cover the duration of the stay are required.
Which sample size out of a population of 1000 is most likely to lead to a valid conclusion?
Providing of course that a sample is representative of the population from which it is drawn, the bigger it is the more likely it will be to lead to a valid conclusion. Therefore, the best sample size when there are no restrictions, as in this case, would be one of 1000.
What IP address 10.11.12.13 is a valid address?
The IP address, '10.11.12.13' is not a valid address. This IP address is just a sample that is used.
The constant rate used as a gauge in calculating the valid sample size?
statistics
Is a biased sample valid?
No because in statistics a biased collection of data is invalid.
