Compare Data Sets Using Centre And Spread
Gbogbo ọrọ náà
To compare two groups fairly, one number is rarely enough. You need a measure of the center (where the data sits) and a measure of the spread (how varied it is). Only together do they tell the full story.
In this lesson you will compare data sets using a measure of center (mean or median) and a measure of spread (range or interquartile range), drawing clear conclusions about how two groups differ.
Ebumnobi
- Compare two data sets using measures of center (median, mean) and spread, and the shape of the distribution.
Nkuzi Olu
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Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
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Akwụkwọ Ọmụmụ
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Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Compare Data Sets Using Centre And Spread. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- To compare two data sets fairly you should use: A. only an average B. only the range C. a measure of center and a measure of spread D. only the mode Answer: C
- Class A scores 5,5,5,5,5 and Class B scores 1,3,5,7,9. The means are: A. different B. both 5 C. both 3 D. both 9 Answer: B
- The range of Class B (1,3,5,7,9) is: A. 0 B. 5 C. 8 D. 9 Answer: C
- Two data sets with the same mean but different spreads are: A. identical B. equally consistent C. different in how varied they are D. impossible Answer: C
- A smaller spread means the data is: A. larger on average B. more consistent C. less reliable D. higher Answer: B
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Measures of the Spread of the Data
An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard devia
"Introductory Statistics: Measures of the Spread of the Data" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/introductory-statistics/pages/2-7-measures-of-the-spread-of-the-data. Access for free at https://openstax.org/books/introductory-statistics/pages/1-introduction
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Akụkụ akwụkwọ
Skewness and the Mean, Median, and Mode
Consider the following data set. 4; 5; 6; 6; 6; 7; 7; 7; 7; 7; 7; 8; 8; 8; 9; 10 This data set can be represented by following histogram. Each interval has width one, and each value is located in the middle of an interval. The histogram displays a symmetrical distribution of data. A distribution is
"Introductory Statistics: Skewness and the Mean, Median, and Mode" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/introductory-statistics/pages/2-6-skewness-and-the-mean-median-and-mode. Access for free at https://openstax.org/books/introductory-statistics/pages/1-introduction
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Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Compare Data Sets Using Centre And Spread? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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