Green Bridge Learning Resource Nchekwa Maka Histograms With Frequency Density

Gbogbo ọrọ náà

A histogram looks like a bar chart, but when the class widths are unequal a fair picture needs the bars' areas, not their heights, to show the frequencies. The height then becomes the frequency density.

In this lesson you will draw and interpret histograms with unequal class intervals using frequency density.

Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Histograms With Frequency Density. 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.

On a histogram with unequal widths, the bar height represents: A. frequency B. frequency density C. class width D. the mean Answer: B
Frequency density equals: A. frequency x width B. frequency / class width C. width / frequency D. frequency + width Answer: B
A class of width 20 has frequency 30. Its frequency density is: A. 0.67 B. 1.5 C. 10 D. 600 Answer: B
On a histogram the frequency is given by the bar's: A. height B. width C. area D. colour Answer: C
A bar has height 2 over a width 10. The frequency is: A. 5 B. 12 C. 20 D. 0.2 Answer: C