7th grade math 2 If 40 is decreased by 80%, what is the new amount?
2 answers:
You might be interested in
Answer:
correct option is D.0.0019
Step-by-step explanation:
given data
journal reports p = 34%
random sample n = 225
yielded = 97
solution
we get here first Sample proportion that is
Sample proportion p1 = ...............1
Sample proportion p1 = 0.4311
and here Null hypothesis is
H0 = p ≤ 0.34 ........................2
and
for Alternate hypothesis is
Ha = p > 0.34 ..........................3
so we get here z statistics that is express as
z = ....................4
put here value and we get
solve it we get
z = 2.88468
so here p-value for a test will be
P (z > 2.88468)
P = 1 - P (z < 2.88468)
P = 0.001957
so correct option is D.0.0019