In formulating hypotheses for a statistical test of significance, the null hypothesis is often
a) a statement of “no effect” or “no difference.
b) the probability of observing the data you actually obtained.
c) a statement that the data are all
d) 0. 0.05.

A) A statement of “no effect” or “no difference.

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540