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
Subtract 510 from 375 because you need to find how many more points that he needs to get
Answer:
Step-by-step explanation:
10x(3xy)
10*3*x*x*y
30x²y
Answer:
14
Step-by-step explanation:
94 - 10 = 84
84 / 6 = 14