Question
Answer question 1 & 2 asap please

Question 1 Let Z be a standard normal random variable. Calculate the following probabilities using the calculator provided. R
Question 2 Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of 100 minutes and
0 0
Add a comment Improve this question Transcribed image text
Answer #1

1. P(z>-1.46)=0.5-P(0<z<-1.46)=0.5-(-0.4279)=0.9279

phpWnwrFA.png

P(z\leq 0.63)=0.5+P(0<z<0.63)=0.5+0.2357=0.7357

.

P(-0.84<z<2.10)=P(0<z<2.10)-P(0<z<-0.84)=0.4821-(-0.2995)=0.7816

C

2. Here we need to find P(x<109)

As distribution is normal we can convert x to z

P(x<109)=P(z<\frac{109-100}{20})=P(z<0.45)=0.5+P(0<z<0.45)=0.5+0.1736=0.6736

.

So is the answer

Add a comment
Know the answer?
Add Answer to:
Answer question 1 & 2 asap please Question 1 Let Z be a standard normal random...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT