JEE Main Questions
Find the mean deviation about the mean for the data : Income 0-100 100-200 200-300 300-400 400-500 500-600 600-700 700-800per dayNumber 4 8 9 10 7 5 4 3of persons
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The following data gives the information on the observed lifetimes (in hours) of 225 electrical components:
Calculate the media from the following frequency distribution:
Find the mean and variance for the data
The distance (in km) of 40 engineers from their residence to their place of work were found as follows:5197123109141012722017892518361111515133212157171571216186312312
A survey reading the heights (in cm) of 50 girls of a class was conducted and the following data was obtained:
Compute the mean of the following data :
If the S.D. of a set of observations is 8 and if each observation is
divided by -2, the S.D. of the new set of observations will be
(a) -4 (b) -8 (c) 8 (d) 4
The following frequency distribution gives the monthly consumption of electricity of 68 consumers of a locality. Find the median, mean and mode of the data and compare them.