Answer:
The 90% confidence interval is (-1.987, -1.320).
Step-by-step explanation:
The data provided is:
Sleep without Sleep using
the drug the drug d=without-with
2.5 4.3 -1.8
2.7 4.2 -1.5
3.8 5.0 -1.2
3.8 6.2 -2.4
1.8 2.5 -0.7
4.7 7.1 -2.4
4.8 7.1 -2.3
2.7 3.3 -0.6
1.8 3.5 -1.7
2.2 4.3 -2.1
3.6 4.3 -0.7
5.3 7.0 -1.7
5.2 7.6 -2.4
Compute the sample mean and sample standard deviation:
The degrees of freedom of the test is:
df = n - 1 = 13 - 1 = 12
Compute the critical value of <em>t</em> for 90% confidence level and 12 degrees of freedom as follows:
Compute the 90% confidence interval as follows:
Thus, the 90% confidence interval is (-1.987, -1.320).
The answer is the first one because when adding fractions you add the numerator and then decimal.
Answer:
56.52in
Step-by-step explanation:
Answer:
The answer is B f(x)=x^2-6x+8
5(n+6)=48
5n+30=48
5n=18
n=18/5