Can you please help me understand how to calculate the italicized part of the answer?

Answer:

P = 0.4, n = 50,1000,2000,4000,8000

mean p^ = p = 0.4

standard deviation p^ =

Sq. rt 0.4 ∗ 0.6 /

50 et al

= 0.069282,

*0.015492, 0.010954, 0.00774597, 0.0054772*---> i don't get how to arrive at these numbers

p ≥ 0.42

Z ≥0.42 − 0.40. /069282 et al

Z ≥ 0.29, 1.29, 1.83, 2.58, 3.65

1 − 0.6141, 0 .9015, 0.9664, 0.9951, approx. 1

0.3859, 0.0985, 0.0336, 0.0049, off the chart, practically 0