Question

Which of the following probabilities is equal to approximately 0.2957?

Answer 1

0.2957 > 0.25
and
0.2957 < 1.25

so answer is C.
P(0.25<= z <= 1.25)

Answer 2

Answer with explanation:

Option A

.→ P(-1.25 ≤ Z ≤ 0.25)

P(Z= -1.25)= 0.10565

P(Z=0.25)=0.59871

So Area between , P(-1.25≤ Z ≤ 0.25)= 0.59871 - 0.10565

= 0.49306≠ 0.2957

Option B

→ P(-1.25 ≤ Z ≤ 0.75)

P(Z= -1.25)= 0.10565

P(Z=0.75)=0.77337

So Area between , P(-1.25 ≤ Z ≤ 0.75)= 0.77337 - 0.10565

= 0.66772≠ 0.2957

Option C

→ P(0.25 ≤ Z ≤ 1.25)

P(Z= 0.25)= 0.59871

P(Z=1.25)=0.89435

So Area between , P(0.25 ≤ Z ≤ 1.25)= 0.89435 - 0.59871

= 0.29564= 0.2957

Option D

→ P(0.75 ≤ Z ≤ 1.25)

P(Z= 1.25)= 0.89435

P(Z=0.75)=0.77337

So Area between , P(0.75 ≤ Z ≤ 1.25)= 0.89435 - 0.77337

= 0.12098

= 0.49306≠ 0.2957

Option C: P(0.25 ≤ Z ≤ 1.25)=0.2957