Green Bridge Learning Resource Nchekwa Maka 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.

Ayẹwo Ẹkọ

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