Question 872776
mean=120, standard deviation= 9.75, IF this is the Population SD...
N = 1000 , s = .975 for the 1000 group.
For 5 chosen at random
P(130 < xbar < 136)
P( t < 16/(.975/&#8730;5) - P(t < 10/(.975/&#8730;5) 
Use DF = 4,  t0 find p-value from chart or calculator