Question

The mean percent of childhood asthma prevalence in 43 cities is

2.13​%.

A random sample of

332

of these cities is selected. What is the probability that the mean childhood asthma prevalence for the sample is greater than

2.6​%?

Interpret this probability. Assume that

sigmaσequals=1.22​%.

The probability is

​(Round to four decimal places as​ needed.)

Answer 1

Given

n= 32

Now,

= 1 - 0.9854 ( from Z- table )

= 0.0146

Therefore, the probability is 0.0146

For your data when n = 332

= 1 - 1 ( using excel , = NORMDIST(7.0195,0,1,TRUE)

   = 1 )

= 0

Therefore, the probability is 0