Connect x e What Are The Correct Answer x Connect ce secure https://newconnect.m

Question

Connect x e What Are The Correct Answer x Connect ce secure https://newconnect.mheducation.com.flow/connect.html Chapter 7 Seved Help Save & Exit Submit Check my work 2 A normal population has a mean of 18 and a standard deviation of 4. a. Compute the z value associated with 23. (Round your answer to 2 decimal places.) points eBook Hint Print References b. What proportion of the population is between 18 and 23? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.) c. What proportion of the population is less than 15? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.) Graw Hill

Explanation / Answer

SOLUTIONA:

mean=18

sd=4

X=23

Z=x-mean/sd

=23-18/4

=5/4

=1.25

SOlutionb:

P(18<X<23)

=P(18-18/4<Z<23-18/4)

=P(0<Z<5/4)

=P(0<Z<1.25)

=P(Z<1.25)-P(Z<0)

=0.8944-0.5

=0.3944

ANSWER:0.3944

Solutionc:

P(x<15)

=P(z<15-18/4)

=P(z<-0.75)

=1-P(Z<0.75)

=1-0.7734
=0.2266

ANSWER:0.226

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.