Can you explain how to get the answer?

1 ). identify the 2 - score percent yile. for a standard normal curve, identify the 2-score that correspond to the 20th percentile . options a ) - 0. 84 B ) 0. 5393 ( ) - 2.05 D ) 0. 4027 D ) 0. 0228 2). Identify the score Corresponding to the indicated percentile The length of human prugnancies ( with no complications) from conceptions to birth varies according to a normal distribution mean 260 days and standard deviation only 104 . of Prognancy lenght are less than what value? a) 247 days B ) 259 days ( ) 250 clays D ) 273 days E ) 261 clays C Identify the clata value Corresponding to the indicated percentile. The amount of sleep an adults get per day is normally distributed with a neean of 7 hours and a standard deviation of I.S hours. Five percent of adults sleep more than how many hours per days. A 9 hours B) 8. 5 hors ( ) 95 hours D ) 10 hours