This lesson will show how the value of the standard deviation or σ gives the spread of a normal distribution.Recall...

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You can use the central limit theorem when sampling from a population that is not normally distributed.Most of the time...

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Before explaining what an unbiased estimator is, let us explain what an estimator is. An estimator is a value or...

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What can we conclude when sampling from a normally distributed population?In other words, what can we conclude about samples drawn...

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The standard deviation of the sampling distribution of x̄ is is [latexpage] \[ \sigma_{\overline{x}} = \frac{\sigma }{\sqrt{n} } \] where...

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Review the lesson about Midrange of a data set carefully before taking this quiz. When answering questions, keep in mind...

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Review the lesson about mode of a data set carefully before taking this quiz. When answering questions, keep in mind...

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Review the lesson about median of a set of data carefully before taking this quiz. When answering questions, keep in...

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Review the lesson about mean from a frequency table carefully before taking this quiz. When answering questions, keep in mind...

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Review the lesson about Arithmetic mean carefully before taking this quiz. When answering questions, keep in mind that there may...

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Review the lesson about Types of variables carefully before taking this quiz. When answering questions, keep in mind that there...

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Review the lesson about Variable, element, data set, and observation carefully before taking this quiz.

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Review the lesson about Common sampling methods carefully before taking this quiz.

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Review the lesson about representative sample carefully before taking this quiz.

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Review the lesson about what is a survey carefully before taking this quiz.

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Review the lesson about population versus sample carefully before taking this quiz.

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Review the lesson about types of statistics carefully before taking this quiz.

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Review the lesson about what is statistics carefully before taking this quiz

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Just like quartiles, percentiles and percentile rank are among the measures of position. Percentiles divide a ranked data (ordered set...

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Quartiles and interquartile range are among the measures of position. Just like the name indicates, quartiles divide a ranked data...

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Here we show some examples of binomial experiments. But before we do so, what is a binomial experiment? When an...

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Find here some normal distribution word problems or some applications of the normal distribution. Example #1 Suppose the current annual...

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Finding the z-scores for a specified area is the reverse procedure of finding the area under the normal curve. You...

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Standardizing a normal distribution is to convert a normal distribution to the standard normal distribution. In real-world applications, a continuous...

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Learn how to calculate the area under the standard normal curve. This is an important skill, so study the following...

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Here is the standard normal distribution table. The entries give the areas under the standard normal curve from 0 to...

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The standard normal distribution (SND) is a special case of the normal distribution. When a normally distributed variable has a...

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The normal probability distribution, also called normal curve, is a special type of bell-shaped curve like the one you see...

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The continuous probability distribution is a table that shows the frequency and relative frequency of a continuous random variable. Recall...

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The mean of the sampling distribution of x̄ (also called mean of x̄) is the mean of all possible sample means....

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This lesson will show the difference between sampling and nonsampling errors. Using a sample in order to get information about...

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As stated in the previous lesson, the population mean is always constant. However, different samples of the same size drawn...

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The population distribution is the probability distribution using all elements of a population. Suppose there are 5 students in a...

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The Poisson probability distribution is named after the French mathematician Simeon D. Poisson. Suppose there is a power outage in...

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Here is a list of the types of averages used in statistics also called or measures of central tendency. We...

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Summation notation is used to denote the sum of values. Suppose you have a sample consisting of the ages of...

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Suppose we are selecting a few items from a large number of distinct items and you are trying to find...

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We define the factorial of a number as the multiplication of all integers from that number to 1. We use...

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The standard deviation of a discrete random variable is denoted by σ and the formula to use to compute it...

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