Saturday
April 19, 2014

Homework Help: Stats

Posted by CM on Sunday, September 27, 2009 at 8:51pm.

Suppose that you find out that 20% of all babies say their first word by the time they are 13 months old, and that 90% of all babies say their first word by the time they are 22 months old. Assume that the age at which a baby says its first word is normally distributed. Find the mean age at which a baby says its first word, and the standard deviation.

I don't know how to standardize this without either one (the mean or standard deviation) if that is even what I have to do?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math help! - Mr. Science has a pair of hamsters. The hamsters have 2 babies. ...
Math - Mr. Science has a pair of hamsters. The hamsters have 2 babies. Those ...
Statistics - Suppose that the weight of male babies less than 2 months old is ...
Stats. - An obstetrician maintains that preterm babies (gestation less than 37 ...
Statistics - Suppose that the weight of male babies less than 2 months old is ...
statistics - In a random sample of 50 babies 4 to 7 month old the average number...
statistics - In a random sample of 50 babies 4 to 7 month old the average number...
Math - A toy manufacturer is introducing two new dolls, My First Baby and My ...
Biology - What is the scientific procedure for making designer babies? What ...
social studies - Which one of the following babies is at greatest risk for SIDS...

Search
Members