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# Your mother is a very prominent vocal coach. What does she think about your musical career?

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In Education

# What is a sample selected in a such a way that each member of the population has an equal probability of being included?

Answer This is called a random sample.

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In Statistics

# True or False A sampling distribution is a probability distribution for a statistic?

The statement is true that a sampling distribution is a probability distribution for a statistic.

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In Education

# What is the key feature of probability sampling?

The key feature is that each sample of the given size has the same probability of being selected as the sample. Equivalently, each unit in the population has the same probabil…ity of being included in the sample. (MORE)

In Security

# The Base Rate Fallacy Complicates Intrusion Detection

Intrusion detection systems may be of little practical use if they are not designed and implemented taking into account the underlying mathematics of false alarms. Here we pro…vide an explanation of this phenomenon. To be of practical use, an intrusion detection system should detect a substantial percentage of intrusions while (MORE)

In Courses

# Topics Commonly Covered in College Statistics Courses

A course in statistics is a requirement in a variety of college majors, such as business, mathematics, education and computer sciences. An introductory statistics college cour…se touches upon several topics related to collecting, organizing, interpreting and presenting information. A college courses in statistics requires the knowledge and application of its (MORE)

In Statistics

# Data that can be Extracted From the Bell Curve

The bell curve is arguably one of the most important curves in the field of statistics. Simply by glancing at this curve, one can tell a great deal about how a certain data se…t has been arranged. More complex information can also be derived from the basic data that is (MORE)

In Management

# STRESS is Double Trouble for those with Diabetes

For those with diabetes, stress is especially problematic as it can elevate blood sugar for long periods of time. This article explains the heavy impact stress has on those wi…th diabetes and gives examples of what can be done to help decrease the impact on blood sugar. (MORE)

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In Probability

# What is the sample space for choosing a letter from the word probability?

11 * * * * *No, on two counts.The sample space is the possible outcomes of the experiment, not the NUMBER of possible outcomes. And, as far as this experiment is concerned, th…ere is no way to distinguish between the two occurrences of b and i. So there are, in fact, only 9 possible outcomes. Two of these outcomes have a higher probability but that is a different matter.The sample space is {p, r , o , b, a, i, l, t, y} a set of cardinality 9. (MORE)

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In Education

# What are the advantages and disadvantages of non probability sampling?

Advantages and disadvantages of probability sampling: Advantages: Since it is done at random, the whole process is unbiased. This is good to use in smaller populations, of co…urse it doesn't 100% protect from bias (depending on the question). But this option is a quicker way of achieving information. Disadvantages: As i said before, depending on your question it cannot prevent from bias. Also, if you are sampling information from a large population this will take too much time and patience. There is also no guarantee that what these people say, represents what another group of people believe. Non-probability sampling: Advantages: This is more accurate because you are targeting a specific group, therefore your answers will be similar to what the rest of the population (of this group) will answer. Disadvantages: This is more biased, because the individuals chosen are not at random. They also might not represent what another population thinks (MORE)

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In Education

# Concept of Probability sampling and chi square test?

A probability sampling method is any method of sampling that utilizes some form of random selection. See: http://www.socialresearchmethods.net/kb/sampprob.php … The simple random sample is an assumption when the chi-square distribution is used as the sampling distribution of the calculated variance (s^2). The second assumption is that the particular variable is normally distributed. It may not be in the sample, but it is assumed that the variable is normally distributed in the population. For a very good discussion of the chi-square test, see: http://en.wikipedia.org/wiki/Pearson%27s_chi-square_test (MORE)