A set of data follows normal distribution with a mean of 100 and a standard deviation of 10 .

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A set of data follows normal distribution with a mean of 100and a standard deviation of 10 . Which of the followings istrueApproximately 99 7% of the data lies within 80 and 120Approximately 95% of the data lies within 80 and 120Approximately 68 % of the data lies within 100 and 110Approximately 99 7% of the data lies within 90 and 120QUESTION 10Which of the following statements is correct ( choose onlyone )The normal distribution follows a curve that can be plottedif the mean and the variance are givenGiven a normally distributed variable , 2/ 3 of theobservations have a value lying between the mean minusone standard deviation to the mean plus one standarddeviationThe sum of two normally distributed independent variablesalso follows a normal distributionAll of the above