Answer:
1/16
Step-by-step explanation:
Answer:
Step-by-step explanation:
Since population std deviation is not known, we use t critical value for testing of hypothesis.
a) 90% conf level when n =28
df = 27, t critical = 1.706
b) 95% 28
df =27 and t critical = 2.052
c) 90% and 15
df =14 and t critical = 1.761
d) 95% and n =15
df =14: t critical = 2.145
9a-ab+5b
9(2)-(2)(7)+5(7)
18-14+35
39
I took a picture of the work instead ^^
