TutorMe homepage

SIGN IN

Start Free Trial

Venkat N.

Tutor withl 6 yrs Experience and working in IT in analytics

Tutor Satisfaction Guarantee

Trigonometry

TutorMe

Question:

The average house price in Lincoln Park based on the random sample of 64 homes is $525,000. Your friend at the Chicago City Office tells you that the standard deviation of the house prices based on all houses in Lincoln Park is $80,000. Determine the 90% confidence interval

Venkat N.

Answer:

mean=525000 n=64 sd=80,000 z crit for 1.645 90% confidence interval. for population mean is sample mean-zcrit(population sd/sqrt(n),sample mean+zcrit(population sd/sqrt(n) 525000-1.645(80000/sqrt(64),525000+1.645(80000/sqrt(64) 508550,541450 508550<\displaystyle \mu<541450 lower limit=508550 upper limit=541450

Basic Math

TutorMe

Question:

How many different letter arrangements can be made from the letters Michigan?

Venkat N.

Answer:

MICHIGAN=7 letter word we have 2 I's No of different letter arrangements=7!/2! =7*6*5*4*3*2/2*1 =7*6*5*4*3 =2520 2520 ways of arrangement.

Statistics

TutorMe

Question:

A researcher randomly (no bias) selects 121 trees in the forest to measure the diameter of the trunk. If you know that the sample mean is 15 inches, and the standard deviation for the entire forest is 33 inches, what is the probability distribution of the sample mean. (Hint: Use Central Limit Theorem, which says that sample mean has a normal distribution with the mean same as population and standard deviation of population standard deviation divided by square root of the sample size

Venkat N.

Answer:

n=samplesize=`121 n>30 sample follows normal distruibution according to central limit theorem probability distribution is normal distribution sample mean=pop mean=15 standard error=samplesd/sqrt(n) =33/sqrt(121) =33/11 =3 standard error of sample mean=

Send a message explaining your

needs and Venkat will reply soon.

needs and Venkat will reply soon.

Contact Venkat

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.

Made in California

© 2019 TutorMe.com, Inc.