Answer:
15 <u><</u> x <u><</u> 18? I don't know. Is that what you're looking for?
Step-by-step explanation:
Answer:
The 95% confidence interval for the mean score is:
∈ 
Step-by-step explanation:
We want to estimate the population mean, that is, the average score of all the subjects.
An estimator for the population mean μ is 
Since the sample size is
then we use the statistic
with
degrees of freedom
The confidence interval for the mean is:

Where
is the average score of the sample
is the standard deviation of the sample
is the sample size
for a confidence level of 95% and 26 degrees of freedom
Then confidence interval is


∈ 
It takes Emily 6 minutes to wash the car. This means he washes 16
1
6
of the car per minute.Larissa therefore washes 18
1
8
of the car per minute. Working together, they both wash 16+18
1
6
+
1
8
of the car, or 724
7
24
of the car each minute. This means that it takes 247
24
7
minutes to wash the entire car — or 3 minutes, 25.714285... seconds total.
Find the attachment photo for complete solution
For A, the scares depend on the hours studying, there is a positive relationship between the two.