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A data set consists of 145 observations that range from 56 to 490 What size class interval?
Wiki User
∙ 10y ago
The naive answer to the question is 30. That assumes that the observations are more or less uniformly distributed across the range and, if that is the case, you should get around 5 observations per class.
It also assumes that your interest in the observations is uniform: you are as interested in values near 60 as you are in values near 480. If you were only really interested in values above 450, you could class all of 56 to 449 in one big class and split the rest into smaller classes.
It is also important to see if the distribution is uniform. If it is skewed in either direction, it would make more sense to have smaller classes where the observations were more dense and wider classes where they were sparse.
Wiki User
∙ 10y ago
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What does inquartile range mean in math?
It has no meaning. In statistics, if you have a set of observations, the lower quartile (Q1) is the value such that a quarter of the [number of] observations are smaller and three quarters are larger. The upper quartile, Q3, is defined similarly as the value such that a quarter of the observations are larger. The interquartile range, is the distance between these two: IQR = Q3 - Q1.
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By definition a quarter of the observations are below the lower quartile and a quarter are above the upper quartile. In all, therefore, half the observations lie outside the interquartile range. Many of these will be more than the inter-quartile range (IQR) away from the median (or mean) and they cannot all be outliers. So you take a larger multiple (1.5 times) of the interquartile range as the boudary for outliers.
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How did Galileo observations support the idea of the heliocentric system?
Galileo's observations with his telescope supported the concept of heliocentricism. He noted that the satellites of Jupiter and Venus, based on their range of phases, did not match geocentricism supported by Ptolemy. He noted that based on these findings, that the Heliocentric theory was correct.
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What is high modality?
it is a strong word that is used in expositions and arguments if data is in the form of frequency distribution then the modal range is the interval containing the highest frequency of observations
How do you find out the modal range?
if data is in the form of frequency distribution then the modal range is the interval containing the highest frequency of observations
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A theory unites and explains a broad range of observations.
How would you know if the hypothesis is supported?
exact science consists in: -observation -hypothesis -experiment -conlusion when this conslusion is valuable for a great range of observations, and several experiments prove this, it is generally accepted.
How do you get a interval in math?
an interval is a range, mostly used in bar graphs.(e.g.8-34)
What unites and and explains a broad of observations?
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When do you use uniform distribution?
When, over a given range, the probability that a variable in question lies within a particulat interval is equal to the size of that interval as a proportion of the range.
When tones are separated by the interval called an?
pitch range
What unites and explains a range of observation?
A theory unites and explains a range of observations.
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Range tells you the interval in which the f(x) values are found.
How do you find range of a negative number?
The range of a negative number is the infinite interval, x < 0.
