Answer to Question #31374 in Statistics and Probability for Camilla

Question

In a frequency distribution based on classes 0-10, 10-20, 20-30, 30-40, 40-50,....., two observations, 18, 92 were wrong while the respective correct ones were 31 and 69. if the mean of the classified data was 64 (wrong values included), determine the correct mean if
(i) the wrong values were removed and replaced with the correct ones.
(ii) the wrong values were replaced with the correct ones. Take n
Σfi= 80
i=1