WHAT IS HISTOGRAM?

A histogram is an accurate representation of the distribution of numerical data. It is an estimate of the probability distribution of a continuous variable. It differs from a bar graph, in the sense that a bar graph relates two variables, but a histogram relates only one. 
To construct a histogram, the first step is to "bin" (Data interval) the range of values that is, divide the entire range of values into a series of intervals and then count how many values fall into each interval. The bins are usually specified as consecutive, non-overlapping intervals of a variable. The bins (intervals) must be adjacent, and are often (but are not required to be) of equal size

 OR

A histogram is a display of statistical information that uses rectangles to show the frequency of data items in successive numerical intervals of equal size. In the most common form of histogram, the independent variable is plotted along the horizontal axis and the dependent variable is plotted along the vertical axis. The data appears as colored or shaded rectangles of variable area.

    

Ni namna ya kuwakilisha data kitakwimu. Data hizi zinakuwa zimewekwa katika makundi yanayo fuatana bila kuruka hata kundi moja. KWA MFANO HIZI hapa chini  NI DATA

	25,22 36,38,36,38 46,45,48,46 55,55,52,58,55 68,67,61,72 and 91 zikipangwa katika makundi yanofuatana zitakuwa hivi 20-30   kuna data 2 ambazo zipo kundi hili           30-40 kuna data 4 ambazo zipo kundi hili             40-50   kuna data 4 ambazo zipo kundi hili          50-60  kuna data 5 ambazo zipo kundi hili         60-70  kuna data 3 ambazo zipo kundi hili          70-80   kuna data 1 ambazo zipo kundi hili        80-90 kuna data 0 ambazo zipo kundi hili             90-100 kuna data 1 ambazo zipo kundi hili   na kama utajumlisha idadi ya data kwa kila kundi basi utapa jumla sawa na data ulizo nazo.  = 2+4+4+5+3+1+0+1

jumla ni 20, na haya makundi yanafuatana bila kuacha hata namba moja na yana tofauti zinazofanana(maandishi mekundu mwanzo mwa page.)

BAADAYE GRAPH ITACHORWA IKIZINGATIA KUNDI NA IDADI YA DATA ZILIZO ANGUKIA KUNDI HILO. HORIZONTAL AXIS DATA INTERVAL-BIN VERTICAL AXIS IDADI YA HIZO NAMBA