Statistics, Sample Average: what is the probability that the sample average is at most 11 min?

One Response to “Statistics, Sample Average: what is the probability that the sample average is at most 11 min?”

1. M says:

   November 9, 2010 at 2:58 pm

   ANSWER: 69.146% of all applicants will complete application in 11 minutes.

   NORMAL DISTRIBUTION, STANDARDIZED VARIABLE z, PROBABILITY “LOOK-UP”

   z = (x – μ)/σ STANDARDIZED VARIABLE FOR NORMAL
   x = INDEPENDENT VARIABLE [9]
   μ = POPULATION MEAN [9]
   σ = POPULATION STANDARD DEVIATION [4]

   z = (11- 9)/4 = 0.5

   NORMAL DISTRIBUTION (cumulative), PROBABILITY “LOOK-UP”
   z P( Z <= z )
   0.5 0.69146 (69.146%)

Leave a Reply

Click here to cancel reply.

Name (required)

Mail (will not be published) (required)

Website

CAPTCHA Code *

Notify me of followup comments via e-mail