Dec 13th Pack Day Assignment
Flashcard
•
Mathematics
•
11th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a z-score?
Back
A z-score indicates how many standard deviations an element is from the mean. It is calculated using the formula: z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.
2.
FLASHCARD QUESTION
Front
How do you calculate the z-score for a given value?
Back
To calculate the z-score, subtract the mean from the value and then divide by the standard deviation: z = (X - μ) / σ.
3.
FLASHCARD QUESTION
Front
What is the mean of a sampling distribution?
Back
The mean of a sampling distribution is equal to the mean of the population from which the samples are drawn.
4.
FLASHCARD QUESTION
Front
What does the standard deviation of a sampling distribution represent?
Back
The standard deviation of a sampling distribution, also known as the standard error, measures the dispersion of sample means around the population mean.
5.
FLASHCARD QUESTION
Front
What is the Central Limit Theorem?
Back
The Central Limit Theorem states that the distribution of sample means approaches a normal distribution as the sample size increases, regardless of the population's distribution.
6.
FLASHCARD QUESTION
Front
What is the formula for the standard error of the mean?
Back
The standard error of the mean (SEM) is calculated as SEM = σ / √n, where σ is the population standard deviation and n is the sample size.
7.
FLASHCARD QUESTION
Front
What does phat represent in statistics?
Back
Phat (p̂) represents the sample proportion, which is the number of successes in a sample divided by the total number of observations in that sample.
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