Statistics

Important Questions

Q) BINGO is game of chance. The host has 75 balls numbered 1 through 75. Each player has a BINGO card with some numbers written on…

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Q) The following table gives the distribution of the life time of 400 neon lamps. Find the median lifetime of a lamp. Ans: Let’s re-organize…

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Q) Find the mode of the following frequency distribution: Ans: Since the modal class is the class with the highest frequency. In the given question,…

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Q) For what value of x, is the median of the following frequency distribution 34.5 ? Ans: Let’s re-organize the data in the frequency table…

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Q) Following is the daily expenditure on lunch by 30 employees of a company: Find the mean daily expenditure of the employees. Ans:  Let’s re-arrange the…

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Q) In a hospital the ages of diabetic patients were recorded as follows. Find the median age. Ans: Let’s re-organize the data in the frequency…

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Q) The following table gives the heights (in cm) of a group of 55 students in a class. Compute the modal height and interpret the…

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Q) For the following distribution, calculate mean using all suitable methods: Ans: 1. Direct Method To calculate Mean value of the distribution, Let’s re-arrange the data with…

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Q) Find the mean of the following frequency distribution: Ans: To calculate Mean value of the distribution, Let’s re-arrange the data with midpoint of each class, frequency,…

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Q) Find the mean of the following distribution: Ans: To calculate Mean value of the distribution, Let’s re-arrange the data with midpoint of each class, frequency, and…

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Q) The median of the following data is 50. Find the values of ‘p” and ‘q’, if the sum of all frequencies is 90. Also…

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Q) The length of 40 leaves of a plant are measured correct to nearest millimetre, and the data obtained is represented in the following table: Find…

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Q) The monthly expenditure on milk in 200 families of a Housing Society is given below: Find the value of x and also, find the…

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Q) The mode of the following frequency distribution is 55. Find the missing frequencies ‘a’ and ‘b’. Ans: Since we know that, the modal class is…

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Q) A student noted the number of cars passing through a spot on a road for 100 periods each of 3 minutes and summarised it…

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Q) India meteorological department observes seasonal and annual rainfall every year in different sub-divisions of our country. It helps them to compare and analyse the…

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