Answer these 12 questions to get a special brats doll
200+2000
2+4
1+1
2222+222
500+5000
20000000000+20202020
2020/5
13x50
45+45
10+10
999+999
20000/300
Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.