The mean per capita income is 20,908 dollars per annum with a standard deviation of 407 dollars per annum. What is the probability that the sample mean would be less than 20948 dollars if a sample of 55 persons is randomly selected? Round your answer to four decimal places.

0.7673

Step-by-step explanation:

in this question, we are asked to calculate a probability.

firstly. we start by calculating the z score, then onwards, we check the normal distribution table.

please check attachment for full and complete answer

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

this is false ^.^ lol