Which statement is true of normally distributed data ? ? a. approximately 68% of the data falls within 2 standard deviations (+-2) of the mean b. approximately 68% of the data falls within 1 standard deviation (+-1) of the mean c. approximately 75% of the data falls within 2 standard deviations (+-2) of the mean d. approximately 75% of the data falls within 1 standard deviation (+-1) of the mean

The correct option is b. approximately 68% of the data falls within 1 standard deviation (+-1) of the mean

Explanation:

According to the empirical rule of normal distribution:

1. Approximately 68% of the data falls within 1 standard deviation of the mean

2. Approximately 95% of the data falls within 2 standard deviations of the mean

3. Approximately 99.7% of the data falls within 3 standard deviations of the mean.

Therefore, among the given options, only option b adheres to the empirical rule of the normal distribution. Therefore, the option b is correct

45

step-by-step explanation:

cut 138 centimeters off

step-by-step explanation:

250-112 = 138