= Test: Test 2

Test Test2 Question 5 of 10 The length 01 human pregnanoes is approximately normal wm mean p = 266 days and standard devtafron o = 16 days, What is the probabilTty tial a random sample of 21 pregnanoes has a mean gestaton penod of 261 days or less? The probability that the mean 01 a random sample of 21 pregnanoes ts Vess than 261 days ts approxjmatety (Round to lour deornal places as needed )