
so
(this is wrong because
)
12 is first one 7 is 2nd one 9 is the last one
Answer:
well you didn't show problem 11 but here is a pretty photo of Port orford Oregon
Answer: 2.093
Step-by-step explanation:
As per give , we have
Sample size : n= 20
Degree of freedom : df= n-1=19
Significance level : 
Since , the sample size is small (n<30) so we use t-test.
For confidence interval , we find two-tailed test value.
Using students's t-critical value table,
Critical t-value : 
Thus, the critical value for the 95% confidence interval = 2.093