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A high contrast image and a dark image will have what kind of histogram respectively, when the histogram, h(rk) = nk, rk the kth gray level and nk total pixels with gray level rk, is plotted nk versus rk? The histogram that are concentrated on the dark side of gray scale. The histogram whose component are biased toward high side of gray scale. The histogram that is narrow and centered toward the middle of gray scale. The histogram that covers wide range of gray scale and the distribution of pixel is approximately uniform.
Consider the following statements in respect of histogram: 1. The histogram is a suitable representation of a frequency distribution of a continuous variable. 2. The area included under the whole histogram is the total frequency. Which of the above statements is/are correct?
Annotation of plots in any plotting system involves adding points, lines, or text to the plot, in addition to customizing axis labels or adding titles. Different plotting systems have different sets of functions for annotating plots in this way. Which of the following functions can be used to annotate the panels in a multi-panel lattice plot?
Consider the following statements in respect of a histogram: 1. The total area of the rectangles in a histogram is equal to the total area bounded by the corresponding frequency polygon and the x-axis. 2. When class intervals are unequal in a frequency distribution, the area of the rectangle is proportional to the frequency. Which of the above statements is/are correct?
Histogram equalization or Histogram linearization is represented by of the following equation:
A study was made for the number of persons of different age group visited in a library in week which is shown in the histogram. Study the histogram and answer the question given below. The ratio of the number of persons in the age groups 15 - 20 years and 20 - 25 years together, to the number of persons in the age groups 30 - 35 years and 35 - 40 year together, is: 
The histogram given below presents the frequency distribution of average runs scored by 50 selected players from a district in local cricket tournament. Study the histogram and answer the question that follows.   How many players scored 30.5 runs or less?
The given histogram shows the daily wages ( in Rs.) of workers in a factory. study the histogram and answer the question that follows. The number of workers with daily wages less than Rs. 180 is what percentage of the number of workers with daily wages more than Rs. 190? Express your answer correct to one decimal place.
Below is the histogram of number of people in the age range from 1 – 25 years. How many people are represented by the given histogram?
Below is the histogram of number of hours spent by students on mobile phones. How many students are represented in the given histogram?