Solution:
p = 0.25
q = 1 - p = 0.75
x = 127
n = 480
psample = x/n = 127/480 = 0.2645
test statistic, z = (psample - p) / sqrt(pq/n) = (0.2645 - 0.25) / sqrt(0.25×0.75/480) = 0.733
Y=4 or -4
Explanation: trust me bro
Answer:
Isolate the variable by dividing each side by factors that don't contain the variable.
Inequality Form:
x < 9
Interval Notation:
(-∞
,9)