Wednesday
April 16, 2014

Homework Help: statistics

Posted by Cam on Monday, April 15, 2013 at 10:41am.

A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2. Assume that the variable is normally distributed.

1. Identify the population mean.

2. Identify the population standard deviation.

3. Suppose a random sample of 15 people over 55 is selected. What is the probability that the sample mean is above 9?

4. Suppose a random sample of 100 people over 55 is selected. What is the probability that the sample mean will be below 7?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Statistics - 1. A study of 40 people found that they could do on the average15 ...
statistics - A study of peach trees found that the average number of peaches per...
math - A quasi-scientific study was done to find some link to autism. In the ...
the fallacies of generalizing PLEASE HELP! - A quasi-scientific study was done ...
Statistics - A recent study stated that if a person chewed gum the average ...
Statistics - An economist found that a random sample of 42 high school teachers ...
statistics - A study of 35 professors showed that the average time they spent ...
Statistics - 1. A study of 40 people found that they could do on the average15 ...
Statistics - A study found that 8-to 12-year olds spend an average of $18.50 per...
statistic - 2. A sociologist conducted a study of divorce patterns in a ...

Search
Members