statistics

Front

Mean of 20 observations is 17. If in the observations, observation 40 is replaced by 12, find the new mean.

Back

15.6

Front

Mean of 36 observations is 12. One observation 47 was misread as 74. Find the correct mean.

Back

11.25

Front

Mean of first 10 natural numbers

Back

5.5

Front

Write the class mark of an interval 90 – 120.

Back

105

Front

There are 50 numbers. Each number is subtracted from 53 and the mean of the numbers so obtained is found to be – 3.5. Find the mean of the given numbers.

Back

56.5

Front

If the median of data (arranged in ascending order) 31, 33, 35, x, x+10, 48, 48, 50 is 40, then find value of x.

Back

35

Front

Find the adjusted frequency for the class 25-45 in a histogram.

Back

2

Front

Find the mean of the following distribution Options: 20, 19, 28, 45

Back

19

Front

Scores of an English test out of 100 of 20 students: 75, 69, 88, 55, 95, 88, 73, 64, 75, 98, 88, 95, 90, 95, 88, 44, 59, 67, 88, 99. Find the median.

Back

88

Front

Find the probability that a student obtained less than 20% in the mathematics test. Options: 7/90, 20/90, 15/90, 1/90.

Back

7/90